The Cleveland Tigers were the first Cleveland team franchise in what became the National Football League (NFL). The Tigers played in the " Ohio League " before joining the American Professional Football Association (later renamed the National Football League in 1922) during the 1920 and 1921 seasons.
111-488: The Rock Island Independents were a professional American football team, based in Rock Island, Illinois , from 1907 to 1926. The Independents were a founding National Football League franchise. They hosted what has been retrospectively designated the first National Football League game on September 26, 1920, at Douglas Park . The Independents were founded in 1907 by Demetrius Clements as an independent football club. Hence,
222-403: A halftime period, and the first and third quarters are followed by a short break. Before the game starts, the referee and each team's captain meet at midfield for a coin toss . The visiting team can call either "heads" or "tails"; the winner of the toss chooses whether to receive or kick off the ball or which goal they wish to defend. They can defer their choice until the second half. Unless
333-670: A traveling team . The AFL folded after the season and the Independents were rejected in their attempt to rejoin the NFL. They played as a semi-pro team in 1927, and then went out of business. From their inception until their last season, the Independents played at Douglas Park in Rock Island, Illinois, from 1907 to 1925. In 1926, in what became their final year of existence, the Independents moved to Browning Field in neighboring Moline, Illinois . Both locations are still in use today. Douglas Park
444-401: A 10-yard-long chain between them, are used to measure for a first down. The chain crew stays on the sidelines during the game, but if requested by the officials they will briefly bring the chains on to the field to measure. A typical chain crew will have at least three people—two members of the chain crew will hold either of the two sticks, while a third will hold the down marker. The down marker,
555-525: A PAT attempt or successful field goal, the scoring team must kick the ball off to the other team. A safety is scored when the ball carrier is tackled in the carrier's own end zone. Safeties are worth two points, which are awarded to the defense. In addition, the team that conceded the safety must kick the ball to the scoring team via a free kick . Football games are played on a rectangular field that measures 120 yards (110 m) long and 53 + 1 ⁄ 3 yards (48.8 m) wide. Lines marked along
666-453: A field goal instead. A group of officials, the chain crew, keeps track of both the downs and the distance measurements. On television, a yellow line is electronically superimposed on the field to show the first down line to the viewing audience. There are two categories of kicks in football: scrimmage kicks, which can be executed by the offensive team on any down from behind or on the line of scrimmage, and free kicks. The free kicks are
777-775: A football star at Notre Dame from 1914 to 1916, and with the Massillon Tigers. Cofall helped re-organize the Cleveland team in 1919 and, along with O'Donnell attended the September 1920 meeting in Canton, Ohio that founded the American Professional Football Association, which became the NFL the following year. For the first half of the 1920 season, Cofall was the Tigers' player-coach; he was also elected vice-president of
888-457: A group of Princeton players realized that, as the snap was uncontested, they could now hold the ball indefinitely to prevent their opponent from scoring. In 1881, in a game between Yale and Princeton, both teams used this strategy to maintain their undefeated records. Each team held the ball, gaining no ground, for an entire half, resulting in a 0–0 tie. This "block game" proved extremely unpopular with both teams' spectators and fans. A rule change
999-533: A large stick with a dial on it, is flipped after each play to indicate the current down and is typically moved to the approximate spot of the ball. The chain crew system has been used for over 100 years and is considered an accurate measure of distance, rarely subject to criticism from either side. Football is a full-contact sport, and injuries are relatively common. Most injuries occur during training sessions, particularly ones that involve contact between players. To try to prevent injuries, players are required to wear
1110-408: A long circumference of 28 to 28 + 1 ⁄ 2 inches (71 to 72 cm), and a short circumference of 21 to 21 + 1 ⁄ 4 inches (53 to 54 cm). In college and high school play the ball has a long axis of 10 + 7 ⁄ 8 to 11 + 7 ⁄ 16 inches (27.6 to 29.1 cm), a long circumference of 27 + 3 ⁄ 4 to 28 + 1 ⁄ 2 inches (70 to 72 cm), and
1221-420: A minimum of 10 feet (3.0 m) on high school fields. Goal posts are padded at the base, and orange ribbons are normally placed at the tip of each upright as indicators of wind strength and direction. The football itself is a prolate spheroid leather ball, similar to the balls used in rugby or Australian rules football . To contain the compressed air within it, a pig's bladder was commonly used before
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#17328454575261332-496: A modified scoring system. These schools formed the Intercollegiate Football Association , although Yale did not join until 1879. Yale player Walter Camp , now regarded as the "Father of American Football", secured rule changes in 1880 that reduced the size of each team from 15 to 11 players and instituted the snap to replace the chaotic and inconsistent scrum . While the game between Rutgers and Princeton
1443-428: A pass hits the ground without a player having caught it. A forward pass can be legally attempted only if the passer is behind the line of scrimmage; only one forward pass can be attempted per down. As in rugby, players can also pass the ball backwards at any point during a play. In the NFL, a down also ends immediately if the runner's helmet comes off. The offense is given a series of four plays, known as downs . If
1554-583: A player being paid to participate in a game of American football , although many athletic clubs in the 1880s offered indirect benefits, such as helping players attain employment, giving out trophies or watches that players could pawn for money, or paying double in expense money. Despite these extra benefits, the game had a strict sense of amateurism at the time, and direct payment to players was frowned upon, if not prohibited outright. Over time, professional play became increasingly common, and with it came rising salaries and unpredictable player movement, as well as
1665-427: A quarter ends, play continues until the down is completed. If certain fouls are committed during play while time has expired, the quarter may be extended through an untimed down . Games last longer than their defined length due to play stoppages—the average NFL game lasts slightly over three hours. Time in a football game is measured by the game clock. An operator is responsible for starting, stopping and operating
1776-494: A round ball. An 1875 Harvard–Yale game played under rugby-style rules was observed by two Princeton athletes who were impressed by it. They introduced the sport to Princeton, a feat the Professional Football Researchers Association compared to "selling refrigerators to Eskimos ". Princeton, Harvard, Yale, and Columbia then agreed to intercollegiate play using a form of rugby union rules with
1887-436: A secondary signal. Women can serve as officials; Sarah Thomas became the NFL's first female official in 2015. The seven officials (of a standard seven-man crew; lower levels of play up to the college level use fewer officials) on the field are each tasked with a different set of responsibilities: Another set of officials, the chain crew , are responsible for moving the chains. The chains, consisting of two large sticks with
1998-403: A separate sport from rugby, and the resulting five-yard lines added to the field to measure distances made it resemble a gridiron in appearance. Other major rule changes included a reduction of the field size to 110 by 53 + 1 ⁄ 3 yards (100.6 m × 48.8 m) and the adoption of a scoring system that awarded four points for a touchdown, two for a safety and a goal following
2109-560: A set of equipment. At a minimum players must wear a football helmet and a set of shoulder pads , but individual leagues may require additional padding such as thigh pads and guards, knee pads, chest protectors, and mouthguards . Most injuries occur in the lower extremities, particularly in the knee, but a significant number also affect the upper extremities. The most common types of injuries are strains , sprains , bruises , fractures , dislocations , and concussions . Cleveland Tigers (NFL) The Cleveland Indians football team
2220-410: A short circumference of 20 + 3 ⁄ 4 to 21 + 1 ⁄ 4 inches (53 to 54 cm). Football games last for a total of 60 minutes in professional and college play and are divided into two halves of 30 minutes and four quarters of 15 minutes. High school football games are 48 minutes in length with two halves of 24 minutes and four quarters of 12 minutes. The two halves are separated by
2331-416: A touchdown , and five for a goal from the field . Additionally, tackling below the waist was legalized, and a static line of scrimmage was instituted. Despite these new rules, football remained a violent sport. Dangerous mass-formations like the flying wedge resulted in serious injuries and deaths. A 1905 peak of 19 fatalities nationwide resulted in a threat by President Theodore Roosevelt to abolish
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#17328454575262442-539: A year, but when he could not post the $ 1,000 annual guarantee the NFL required, his franchise was canceled. Guyon and Thorpe went off to LaRue, Ohio to form the Oorang Indians . A new Indians franchise was later purchased by Samuel Deutsch who operated the team in 1923. He then relocated the Canton Bulldogs to Cleveland in 1924 and merged them with his Indians team. A third, unrelated Indians team also played in
2553-460: Is a sport in which two competing teams vie for control of a ball, which can be kicked through a set of goalposts or run into the opponent's goal area to score points. What is considered to be the first American football game was played on November 6, 1869 , between Rutgers and Princeton , two college teams. They consisted of 25 players per team and used a round ball that could not be picked up or carried. It could, however, be kicked or batted with
2664-425: Is called on the offense. There are two main ways the offense can advance the ball: running and passing . In a typical play, the center passes the ball backwards and between their legs to the quarterback in a process known as the snap . The quarterback then either hands the ball off to a running back, throws the ball, or runs with it. The play ends when the player with the ball is tackled or goes out-of-bounds or
2775-437: Is caught or recovered behind the line of scrimmage. If it is touched or recovered by the kicking team beyond this line, it becomes dead at the spot where it was touched. The kicking team is prohibited from interfering with the receiver's opportunity to catch the ball. The receiving team has the option of signaling for a fair catch , which prohibits the defense from blocking into or tackling the receiver. The play ends as soon as
2886-563: Is commonly considered the first American football game, several years prior in 1862, the Oneida Football Club formed as the oldest known football club in the United States. The team consisted of graduates of Boston's elite preparatory schools and played from 1862 to 1865. The introduction of the snap resulted in an unexpected consequence. Before the snap, the strategy had been to punt if a scrum resulted in bad field position. However,
2997-403: Is known as a two-point conversion . In general, the extra point is almost always successful, while the two-point conversion is a much riskier play with a higher probability of failure; accordingly, extra point attempts are far more common than two-point conversion attempts. A field goal (FG), worth three points, is scored when the ball is place kicked or drop kicked through the uprights and over
3108-623: Is likely that Canton's player/coach Jim Thorpe and owner Ralph Hay felt that Flanigan could not deliver on his $ 5,000 guarantee. However, the Independents still had defeated the Columbus Panhandles 49–0 and the Indians 17–0 that season. In 1919, the season prior to the establishment of the National Football League , they claimed to be "Champions of the USA". The invitation to Canton led to
3219-548: Is located at 16th Street and 23rd Avenue in Moline, Illinois. The Independents shared the stadium with the minor league baseball Moline Plowboys . Today, Browning Field is home to Moline High School sports teams and the adjacent Wharton Field House is the former home of the National Basketball Association 's Tri-Cities Blackhawks , today's Atlanta Hawks . A second, unrelated, "Rock Island Independents" played at
3330-474: Is located at the corner of 18th Avenue and 9th Street in Rock Island, Illinois. Douglas Park was also the home of the minor league baseball Rock Island Islanders during the Independents era. Today, the site has baseball field and a playground. The Quad City 76ers Semi Pro Baseball Club has called Douglas Park home since 1986. Rock Island Post 200 also plays some home games at Douglas Park. Douglas Park also hosts annual "rivalry" games. The Rockton Showdown features
3441-407: Is responsible for all kicking plays. The special teams unit of the team in control of the ball tries to execute field goal (FG) attempts, punts , and kickoffs , while the opposing team's unit will aim to block or return them. Three positions are specific to the field goal and PAT (point-after-touchdown) unit: the placekicker (K or PK), holder (H), and long snapper (LS). The long snapper's job
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3552-421: Is to block members of the defensive line from tackling the ball carrier on running plays or sacking the quarterback on passing plays. The leader of the offensive line is the center, who is responsible for snapping the ball to the quarterback, blocking, and for making sure that the other linemen do their jobs during the play. On either side of the center are the guards (G), while tackles (T) line up outside
3663-437: Is to snap the football to the holder, who will catch and position it for the placekicker. There is not usually a holder on kickoffs, because the ball is kicked off a tee; however, a holder may be used in certain situations, such as if wind is preventing the ball from remaining upright on the tee. The player on the receiving team who catches the ball is known as the kickoff returner (KR). The positions specific to punt plays are
3774-720: The American Football League (AFL) after Pyle was denied ownership of an NFL franchise in New York City . In what proved to be a fatal move, after the 1925 season Johnson moved the team to the American Football League. Johnson felt that the American Football League, which featured Red Grange , would out-perform the NFL. The Independents then signed Elmer Layden , one of the Four Horsemen of Notre Dame for 1926. Founding American Football League teams for 1926 were
3885-532: The Boston Bulldogs , Brooklyn Horsemen , Chicago Bulls , Cleveland Panthers , Los Angeles Wildcats , Newark Bears , New York Yankees , Philadelphia Quakers and the Rock Island Independents. Rock Island left the NFL to join the new league. The Independents also moved from Douglas Park in Rock Island to Browning Field in neighboring Moline, Illinois for the 1926 season. The Independents were
3996-756: The Bowl Championship Series (BCS) in 1997. The BCS arrangement proved to be controversial , and was replaced in 2014 by the College Football Playoff (CFP). A football game is played between two teams of 11 players each. Playing with more on the field is punishable by a penalty. Teams may substitute any number of their players between downs; this "platoon" system replaced the original system, which featured limited substitution rules, and has resulted in teams utilizing specialized offensive, defensive and special teams units. The number of players allowed on an active roster varies by league;
4107-661: The Dayton Triangles and the Columbus Panhandles in Dayton, Ohio . The Independents posted 4–2–1 records in the league's first year. They had the same record the next two seasons, with five of their six losses in three years coming to George Halas and the Decatur Staleys/Chicago Staleys/Chicago Bears . On June 24, 1922, the APFA changed its name to the National Football League (NFL). On October 16, 1921,
4218-506: The Northwest Football League in 1936. †= Never played in the league American football American football , referred to simply as football in the United States and Canada and also known as gridiron football , is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense , the team with possession of the oval-shaped football , attempts to advance down
4329-473: The Super Bowl , ranks among the most-watched club sporting events globally. In 2022, the league had an annual revenue of around $ 18.6 billion, making it the most valuable sports league in the world. Other professional and amateur leagues exist worldwide, but the sport does not have the international popularity of other American sports like baseball or basketball ; the sport maintains a growing following in
4440-412: The center (C), are allowed to line up in or cross the neutral zone until the ball is snapped. Interior offensive linemen are not allowed to move until the snap of the ball. The main backfield positions are the quarterback (QB), halfback/tailback (HB/TB), and fullback (FB). The quarterback is the leader of the offense. Either the quarterback or a coach calls the plays. Quarterbacks typically inform
4551-409: The commissioner . NCAA and NFHS teams are "strongly advised" to number their offensive players according to a league-suggested numbering scheme. Although the sport is played almost exclusively by men, women are eligible to play in high school, college, and professional football. No woman has ever played in the NFL, but women have played in high school and college football games. In 2018, 1,100 of
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4662-494: The drive . Points are scored primarily by advancing the ball into the opposing team's end zone for a touchdown or kicking the ball through the opponent's goalposts for a field goal . The team with the most points at the end of the game wins. American football evolved in the United States, originating from the sports of soccer and rugby . The first American football game was played on November 6, 1869 , between two college teams, Rutgers and Princeton , using rules based on
4773-411: The kickoff , which starts the first and third quarters and overtime and follows a try attempt or a successful field goal; the safety kick follows a safety. On a kickoff, the ball is placed at the 35-yard line of the kicking team in professional and college play and at the 40-yard line in high school play. The ball may be drop kicked or place kicked. If a place kick is chosen, the ball can be placed on
4884-407: The neutral zone was created along the width of the football before the snap. Scoring was also adjusted: points awarded for field goals were reduced to three in 1909 and points for touchdowns were raised to six in 1912. Also in 1912, the field was shortened to 100 yards (91 m) long, two 10-yard-long (9.1 m) end zones were created, and teams were given four downs instead of three to advance
4995-407: The punter (P), long snapper, upback , and gunner . The long snapper snaps the football directly to the punter, who then drops and kicks it before it hits the ground. Gunners line up split outside the line and race down the field, aiming to tackle the punt returner (PR)—the player who catches the punt. Upbacks line up a short distance behind the line of scrimmage, providing additional protection to
5106-432: The 1910 team went undefeated and were not scored on in five games. Many of the players from the 1910 team reunited in 1912 and, under Coach John Roche, the Independents won eight games without giving up a score. Walter Flanigan was the owner of the Independents 1915 to 1923. Dale Johnson then owned the team from 1924 until it folded, along with the rest of the American Football League in 1926. Walter Flanigan had joined
5217-413: The 1966 season. Once the merger was completed, it was no longer a championship game between two leagues and reverted to the NFL championship game, which came to be known as the Super Bowl . College football maintained a tradition of postseason bowl games . Each bowl game was associated with a particular conference and earning a spot in a bowl game was the reward for winning a conference. This arrangement
5328-552: The 225,000 players in Pop Warner Little Scholars youth football were girls, and around 11% of the 5.5 million Americans who report playing tackle football are female according to the Sports and Fitness Industry Association. The role of the offensive unit is to advance the football down the field with the ultimate goal of scoring a touchdown . The offensive team must line up in a legal formation before they can snap
5439-565: The Independents as a backup end in 1912. For the following two seasons, he served as the team's assistant manager, under then-manager Jack Roche. In 1915, Flanigan became the owner of the team and later promoted the Independents by scheduling two home games in 1917 against the Minneapolis Marines . This contest helped the Independents gain legitimacy. Rock Island lost to the Marines by a score of 7–3 in front of over 6,400 fans at Douglas Park in
5550-475: The Independents battled back from a 7–0 deficit against the Chicago Cardinals to lead 14–7 in the second quarter. The comeback was sparked by two touchdowns , scored by player-coach Frank Coughlin . Flanigan then ordered the team's tackle , Ed Healey relieve Coughlin. Once Coughlin was safely on his way toward the sideline, Healey delivered a message to Jimmy Conzelman from Flanigan, it read: "Coughlin
5661-624: The Independents being invited to the September 17, 1920 historic meeting on the formation of the National Football League. The National Football League was formed over the course of two meetings in 1920. On August 20, 1920, an initial meeting was held by representatives of the Akron Pros , Canton Bulldogs , Cleveland Tigers , and Dayton Triangles . The meeting was held at the Jordan and Hupmobile auto showroom in Canton, Ohio and resulted in
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#17328454575265772-549: The Independents defeated the Muncie Flyers 45–0 at Douglas Park in the first full week of APFA league play. 3,100 fans were in attendance as Arnie Wyman, former Minnesota great, made his debut for the Islanders, scoring three touchdowns. This might have been the first NFL game ever played between two NFL teams, however, NFL historical records don't indicate the kickoff time for this game or the other APFA game played that day between
5883-447: The Independents hosted the first official game featuring a team from the APFA. Thus, the Independents' Douglas Park became the site of the first ever National Football League contest. Just nine days after the league had formed, on September 26, 1920, the Independents defeated the St. Paul Ideals 48–0 in the first contest involving a member team of the APFA. A week later, on October 3, 1920,
5994-487: The Independents in 1924 and the team went 5–2–2 in league play. After the 1925 season , Thorpe formed a team composed primarily of his teammates from the Rock Island Independents, that would play several games throughout Florida . In a 1926 New Year's Day football exhibition, Thorpe's " Tampa Cardinals " played against the Chicago Bears led by Red Grange . The game itself was billed as a clash of old vs. new, with Grange,
6105-448: The Independents to Dale Johnson , a local businessman. Johnson hired Vince McCarthy , the Independents' back-up quarterback as the new general manager . With Rock Island High School alumni and Olympian Sol Butler joining the squad, Rock Island went 2–3–3 in 1923, and rebounded to post winning seasons in 1924 and 1925 . Jim Thorpe , considered "the World's Greatest Athlete", joined
6216-493: The Independents. One of the first professional football teams, the Independents were founded in 1907 by Demetrius Clements as an independent football club. The independent team had no athletic club affiliation, no social club ties and no corporate company backing or sponsorship. As a result, the team was named the "Independents." The Independents played in Douglas Park (1907–1925) and Browning Field (1926). After its founding,
6327-508: The NFL had established itself as America's premier professional football league. The dominant form of football at the time was played at the collegiate level . The upstart NFL received a boost to its legitimacy in 1925, however, when an NFL team, the Pottsville Maroons , defeated a team of Notre Dame all-stars in an exhibition game . A greater emphasis on the passing game helped professional football to distinguish itself further from
6438-564: The NFL has a 53-man roster, while NCAA Division I allows teams to have 63 scholarship players in the FCS and 85 scholarship players in the FBS, respectively. Individual players in a football game must be designated with a uniform number between 1 and 99, though some teams may "retire" certain numbers , making them unavailable to players. NFL teams are required to number their players by a league-approved numbering system, and any exceptions must be approved by
6549-607: The Tigers returned with two future Hall of Famers , Joe Guyon and player-coach Jim Thorpe. The team won its first two games. However, during the team's second game, Thorpe injured his ribs and was lost for the season. The Tigers then narrowly lost the next four games. When Thorpe returned to action in a postseason game against the New York Brickley Giants in December, the Tigers were again victorious. Early in 1922, O'Donnell received league permission to suspend operations for
6660-460: The advent of artificial rubber inside the leather outer shell to sustain crushing forces . At all levels of play, the football is inflated to 12 + 1 ⁄ 2 to 13 + 1 ⁄ 2 psi (86 to 93 kPa), or just under one atmosphere, and weighs 14 to 15 ounces (400 to 430 g); beyond that, the exact dimensions vary slightly. In professional play the ball has a long axis of 11 to 11 + 1 ⁄ 4 inches (28 to 29 cm),
6771-550: The ball 10 yards (9.1 m). The roughing the passer penalty was implemented in 1914, and eligible players were first allowed to catch the ball anywhere on the field in 1918. On November 12, 1892, Pudge Heffelfinger was paid $ 500 (equivalent to $ 16,956 in 2023) to play a game for the Allegheny Athletic Association against the Pittsburgh Athletic Club . This is the first recorded instance of
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#17328454575266882-435: The ball is caught, and the ball may not be advanced. Officials are responsible for enforcing game rules and monitoring the clock. All officials carry a whistle and wear black-and-white striped shirts and black hats except for the referee, whose hat is white. Each carries a weighted yellow flag that is thrown to the ground to signal that a foul has been called. An official who spots multiple fouls will throw their hat as
6993-430: The ball. An offensive formation is considered illegal if there are more than four players in the backfield or fewer than five players numbered 50–79 on the offensive line. Players can line up temporarily in a position whose eligibility is different from what their number permits as long as they report the change immediately to the referee, who then informs the defensive team of the change. Neither team's players, except
7104-586: The baseball teams from Alleman and Rock Island High Schools. The Battle for the Douglas Cup features Rock Island and Moline High Schools. And, the Veterans Cup Classic features the American Legion teams from Rock Island and Moline. Douglas Park hosts an annual tribute football game to the Independents, played in retro uniforms and using early football rules. Browning Field, the Independents' home in 1926,
7215-573: The college game during the late 1930s. Football, in general, became increasingly popular following the 1958 NFL Championship game between the Baltimore Colts and the New York Giants , still referred to as the "Greatest Game Ever Played". The game, a 23–17 overtime victory by the Colts, was seen by millions of television viewers and had a major influence on the popularity of the sport. This, along with
7326-594: The conference, as they favored a rugby-style game that allowed running with the ball. After playing McGill University using both American (known as "the Boston game ") for the first game and Canadian (rugby) rules for the second one, the Harvard players preferred the Canadian style of having only 11 men on the field, running the ball without having to be chased by an opponent, the forward pass, tackling, and using an oblong instead of
7437-541: The conservative NFL to expand to Dallas and Minnesota in an attempt to destroy the new league. Meanwhile, the AFL introduced many new features to professional football in the United States: official time was kept on a scoreboard clock rather than on a watch in the referee's pocket, as the NFL did; optional two-point conversions by pass or run after touchdowns; names on the jerseys of players; and several others, including expansion of
7548-413: The crossbars of the defense's goalposts. In practice, almost all field goal attempts are done via place kick. While drop kicks were common in the early days of the sport, the shape of modern footballs makes it difficult to reliably drop kick the ball. The last successful scoring play by drop kick in the NFL was accomplished in 2006; prior to that, the last successful drop kick had been made in 1941. After
7659-399: The defense is to prevent the offense from scoring by tackling the ball carrier or by forcing turnovers . Turnovers include interceptions (a defender catching a forward pass intended for the offense) and forced fumbles (taking possession of the ball from the ball-carrier). The defensive line (DL) consists of defensive ends (DE) and defensive tackles (DT). Defensive ends line up on
7770-430: The defensive backfield. They are divided into two types: middle linebackers (MLB) and outside linebackers (OLB). Linebackers tend to serve as the defensive leaders and call the defensive plays, given their vantage point of the offensive backfield. Their roles include defending the run, pressuring the quarterback, and tackling backs, wide receivers, and tight ends in the passing game. The defensive backfield , often called
7881-472: The ends and sides of the field are known as the end lines and sidelines . Goal lines are marked 10 yards (9.1 m) inward from each end line. Weighted pylons are placed the sidelines on the inside corner of the intersections with the goal lines and end lines. White markings on the field identify the distance from the end zone. Inbound lines, or hash marks , are short parallel lines that mark off 1-yard (0.91 m) increments. Yard lines , which can run
7992-404: The ends of the line, while defensive tackles line up inside, between the defensive ends. The primary responsibilities of defensive ends and defensive tackles are to stop running plays on the outside and inside, respectively, to pressure the quarterback on passing plays, and to occupy the line so that the linebackers can break through. Linebackers line up behind the defensive line but in front of
8103-499: The feet, hands, head, or sides, with the objective being to advance it into the opponent's goal. Rutgers won the game 6–4. Collegiate play continued for several years with games played using the rules of the host school. Representatives of Yale, Columbia , Princeton and Rutgers met on October 19, 1873, to create a standard set of rules for use by all schools. Teams were set at 20 players each, and fields of 400 by 250 feet (122 m × 76 m) were specified. Harvard abstained from
8214-412: The field by running with the ball or throwing it , while the defense , the team without possession of the ball, aims to stop the offense's advance and to take control of the ball for themselves. The offense must advance the ball at least ten yards in four downs or plays; if they fail, they turn over the football to the defense, but if they succeed, they are given a new set of four downs to continue
8325-556: The first game on November 4. The two teams played again on November 18 and Rock Island lost again, 33–7, in the second game in front of 4,500 fans. However, World War I and the military draft put a temporary halt to Flanigan's plans of expanding the team into new markets. In 1919, Flanigan hired Rube Ursella of the Minneapolis Marines to serve as a player-coach . Ursella brought several other Minneapolis players with him. These new players would help improve play and help secure
8436-712: The first meeting, plus the Decatur Staleys , Chicago Cardinals , Massillon Tigers , Hammond Pros , Muncie Flyers , Rock Island Independents and Rochester Jeffersons . The minutes of this meeting are in Pro Football Hall of Fame archives. The league was renamed to the American Professional Football Association (APFA), and the number of teams was expanded, with league play to begin in 1920. The newly formed league elected Jim Thorpe as its first President and consisted of 14 teams. The Buffalo All-Americans , Chicago Tigers , Columbus Panhandles , and Detroit Heralds joined
8547-535: The formation of the American Professional Football Conference (APFC). A second and considerably larger meeting was held on September 17, 1920. The meeting was again at Canton owner Ralph Hay 's Hupmobile dealership in Canton and Independents owner Walter Flanigan was present to represent the Independents. Representatives of eleven teams were present at the second meeting: the four teams from
8658-511: The game are professional and college football , with the other major levels being high-school and youth football. As of 2022 , nearly 1.04 million high-school athletes play the sport in the U.S., with another 81,000 college athletes in the NCAA and the NAIA . The National Football League (NFL) has the highest average attendance of any professional sports league in the world . Its championship game,
8769-419: The game clock based on the direction of the appropriate official . A separate play clock is used to show the amount of time within which the offense must initiate a play. The play clock is set to 25 seconds after certain administrative stoppages in play and to 40 seconds when play is proceeding without such stoppages. If the offense fails to start a play before the play clock reads "00", a delay of game foul
8880-618: The game unless major changes were made. In response, 62 colleges and universities met in New York City to discuss rule changes on December 28, 1905. These proceedings resulted in the formation of the Intercollegiate Athletic Association of the United States, later renamed the National Collegiate Athletic Association (NCAA). The legal forward pass was introduced in 1906, although its effect
8991-443: The ground or a tee; a holder may be used in either case. On a safety kick, the kicking team kicks the ball from their own 20-yard line. They can punt, drop kick or place kick the ball, but a tee may not be used in professional play. Any member of the receiving team may catch or advance the ball. The ball may be recovered by the kicking team once it has gone at least ten yards and has touched the ground or has been touched by any member of
9102-434: The guards. The principal receivers are the wide receivers (WR) and the tight ends (TE). Wide receivers line up on or near the line of scrimmage, split outside the line. The main goal of the wide receiver is to catch passes thrown by the quarterback, but they may also function as decoys or as blockers during running plays. Tight ends line up outside the tackles and function both as receivers and as blockers. The role of
9213-454: The illegal payment of college players who were still in school. The National Football League (NFL), a group of professional teams that was originally established in 1920 as the American Professional Football Association, aimed to solve these problems. This new league's stated goals included an end to bidding wars over players, prevention of the use of college players, and abolition of the practice of paying players to leave another team. By 1922,
9324-448: The innovations introduced by the new American Football League (AFL) in the early 1960s, helped football to become the most popular sport in the United States by the mid-1960s. The rival AFL arose in 1960 and challenged the NFL's dominance. The AFL began in relative obscurity but eventually thrived, with an initial television contract with the ABC television network. The AFL's existence forced
9435-682: The league during the year. The Massillon Tigers from Massillon, Ohio was also at the September 17 meeting, but did not field a team in 1920. After the formation of the league, Flanigan was named to the committee that created the league's constitution. Today, only two of these franchises, the Decatur Staleys (now the Chicago Bears ) and the Chicago Cardinals (now the Arizona Cardinals ), remain as NFL franchises. On September 26, 1920 ,
9546-530: The new league. In their first season, the Cleveland Tigers scored only 2 touchdowns and lost 3 games by 7–0 scores, compiling a record of 1–4–2. For the 1921 season, the name of the team was changed to the Indians, partly because it was a stock name in Cleveland (a baseball team had also used the name since 1915) but more because three Native Americans were signed away from the Canton Bulldogs . In 1921
9657-429: The offense advances ten or more yards in the four downs, they are awarded a new set of four downs. If they fail to advance ten yards, possession of the football is turned over to the defense. In most situations, if the offense reaches their fourth down they will punt the ball to the other team, which forces them to begin their drive from farther down the field; if they are in field goal range , they might attempt to score
9768-409: The only NFL team to make the jump to the rival league. The AFL did not pay as much as the NFL did a year prior and Independents players left the team for bigger salaries with other NFL teams. As a result, the Independents ended their season with a 2–6–1 record. Coached by Johnny Armstrong , the Independents played their first three games at Browning Field and then played the rest of their 1926 games as
9879-445: The plane of the two end lines. The crossbar of these posts is 10 feet (3.0 m) above the ground, with vertical uprights at the end of the crossbar 18 feet 6 inches (5.64 m) apart for professional and collegiate play, and 23 feet 4 inches (7.11 m) apart for high school play. The uprights extend vertically 35 feet (11 m) on professional fields, a minimum of 10 yards (9.1 m) on college fields, and
9990-448: The point(s)-after-touchdown (PAT) or conversion, which is a single scoring opportunity. This is generally attempted from the two- or three-yard line, depending on the level of play. If the PAT is scored by a place kick or drop kick through the goal posts, it is worth one point, typically called the extra point. If the PAT is scored by what would normally be a touchdown, it is worth two points; this
10101-473: The punter. In football, the winner is the team that has scored more points at the end of the game. There are multiple ways to score in a football game. The touchdown (TD), worth six points, is the most valuable scoring play in American football. A touchdown is scored when a live ball is advanced into, caught, or recovered in the opposing team's end zone. The scoring team then attempts a try, more commonly known as
10212-401: The receiving team. The three types of scrimmage kicks are place kicks, drop kicks, and punts. Only place kicks and drop kicks can score points. The place kick is the standard method used to score points, because the pointy shape of the football makes it difficult to reliably drop kick. Once the ball has been kicked from a scrimmage kick, it can be advanced by the kicking team only if it
10323-411: The rest of North America, Europe, Brazil, and Japan. In the United States, American football is referred to as "football". The term "football" was officially established in the rulebook for the 1876 college football season , when the sport first shifted from soccer-style rules to rugby-style rules. Although it could easily have been called "rugby" at this point, Harvard, one of the primary proponents of
10434-631: The rest of the offense of the play in the huddle before the team lines up. The quarterback lines up behind the center to take the snap and then hands the ball off, throws it, or runs with it. The primary role of the halfback, also known as the running back or tailback, is to carry the ball on running plays. Halfbacks may also serve as receivers. Fullbacks tend to be larger than halfbacks and function primarily as blockers, but they are sometimes used as runners in short-yardage or goal-line situations. They are seldom used as receivers. The offensive line (OL) consists of several players whose primary function
10545-676: The rising star, taking on Thorpe, the aging legend. During the game Grange rushed for a 70-yard touchdown as the Bears notched a 17–3 victory at Plant Field in Tampa, Florida . The Independents' overall NFL record was 26–14–9, with five winning seasons in six years. After finishing fourth in 1920, their best overall finish in the National Football League standings was fifth, which they accomplished three times: in 1921 and 1922 under Jimmy Conzelman , and in 1924 under Johnny Armstrong . In 1926, football star Red Grange and his agent, C. C. Pyle , formed
10656-499: The role of minority players, actively recruited by the league in contrast to the NFL. The AFL also signed several star college players who had also been drafted by NFL teams. Competition for players heated up in 1965, when the AFL New York Jets signed rookie Joe Namath to a then-record $ 437,000 contract (equivalent to $ 4.23 million in 2023). A five-year, $ 40 million NBC television contract followed, which helped to sustain
10767-515: The rugby-style game, compromised and did not request the name of the sport be changed to "rugby". The terms " gridiron " or "American football" are favored in English-speaking countries where other types of football are popular, such as the United Kingdom, Ireland, New Zealand, and Australia. American football evolved from the sports of rugby and soccer . Rugby, like American football,
10878-451: The rules of soccer at the time. A set of rule changes drawn up from 1880 onward by Walter Camp , the "Father of American Football", established the snap , the line of scrimmage , eleven-player teams, and the concept of downs. Later rule changes legalized the forward pass , created the neutral zone , and specified the size and shape of the football. The sport is closely related to Canadian football , which evolved in parallel with and at
10989-435: The same time as the American game, although its rules were developed independently from those of Camp. Most of the features that distinguish American football from rugby and soccer are also present in Canadian football. The two sports are considered the primary variants of gridiron football . American football is the most popular sport in the United States in terms of broadcast viewership audience. The most popular forms of
11100-503: The secondary, consists of cornerbacks (CB) and safeties (S). Safeties are themselves divided into free safeties (FS) and strong safeties (SS). Cornerbacks line up outside the defensive formation, typically opposite a receiver to be able to cover them. Safeties line up between the cornerbacks but farther back in the secondary. Safeties tend to be viewed as "the last line of defense" and are responsible for stopping deep passing plays as well as breakout running plays. The special teams unit
11211-513: The team an invitation to join the NFL. The Independents lost only to the Hammond Pros , led by George Halas in 1919. Flanigan then challenged the Canton Bulldogs to a "championship" game, offering a $ 5,000 guarantee if they would come to Rock Island for the game. But Canton, which had already won the " Ohio League " championship by defeating the Massillon Tigers , turned down the offer. It
11322-422: The team was named the "Independents." In 1926, the Independents left the NFL to become a charter member of the first American Football League , the only NFL team to do so. The Independents then folded along with the entire league in 1927. Pro Football Hall of Fame alumni Jimmy Conzelman (1920–1921), Joe Guyon (1924), Ed Healey (1920–1922), Duke Slater (1922–1926), and Jim Thorpe (1924–1925) played for
11433-411: The width of the field, are marked every 5 yards (4.6 m). A one-yard-wide line is placed at each end of the field; this line is marked at the center of the two-yard line in professional play and at the three-yard line in college play. Numerals that display the distance from the closest goal line in yards are placed on both sides of the field every ten yards. Goalposts are located at the center of
11544-408: The winning team decides to defer, the losing team chooses the option the winning team did not select—to receive, kick, or select a goal to defend to begin the second half. Most teams choose to receive or defer, because choosing to kick the ball to start the game allows the other team to choose which goal to defend. Teams switch goals following the first and third quarters. If a down is in progress when
11655-408: The young league. The bidding war for players ended in 1966 when NFL owners approached the AFL regarding a merger, and the two leagues agreed on one that took full effect in 1970. This agreement provided for a common draft that would take place each year, and it instituted an annual World Championship game to be played between the champions of each league. This championship game began play at the end of
11766-437: Was disappointing, losing twice to the Canton Bulldogs , who were led by Jim Thorpe , and splitting a pair of games with the Columbus Panhandles . In 1920, when owners of professional teams organized a more structured league, Jimmy O'Donnell , a local sports promoter, obtained the Cleveland franchise. O'Donnell, also the owner of a semi-pro baseball team called the Tigers, was aided in his football venture by Stan Cofall ,
11877-476: Was fired! The new coach was Conzelman!" This act marked the first and only time an owner hired a new coach in the middle of a game. In 1922, Flanigan sold the contract of Ed Healey , to Halas and the Chicago Bears for $ 100. However, Healey soon became a star for the Bears and would later be inducted into the Pro Football Hall of Fame in 1964. In 1923 , Flanigan left the Independents to concentrate on his real estate and insurance businesses. In 1923, Flanigan sold
11988-418: Was initially minimal due to the restrictions placed on its use. The idea of a 40-yard-wider field was opposed by Harvard due to the size of the new Harvard Stadium . Other rule changes introduced that year included the reduction of playing time from 70 to 60 minutes and an increase of the distance required for a first down from 5 to 10 yards (4.6 to 9.1 m). To reduce infighting and dirty play between teams,
12099-440: Was necessary to prevent this strategy from taking hold, and a reversion to the scrum was considered. However, Camp successfully proposed a rule in 1882 that limited each team to three downs , or tackles, to advance the ball 5 yards (4.6 m). Failure to advance the ball the required distance within those three downs would result in control of the ball being forfeited to the other team. This change effectively made American football
12210-641: Was originally established in 1916 and played in the Ohio League. The team was formed after the Massillon Tigers raided the Akron Indians roster in 1915 and took away many of their star players. That year Peggy Parratt , the Akron Indians player-coach formed the Cleveland Indians with several former ex-Akron Indians players and a few new ex-college players. Despite a winning record, the 1916 Indians season
12321-542: Was profitable, but it tended to prevent the two top-ranked teams from meeting in a true national championship game, as they would normally be committed to the bowl games of their respective conferences. Several systems have been used since 1992 to determine a national champion of college football. The first was the Bowl Coalition , in place from 1992 to 1994. This was replaced in 1995 by the Bowl Alliance , which gave way to
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