68-577: Baseball Reference is a baseball statistics database maintained by Sports Reference . The site provides career statistics for Major League Baseball (MLB) players and teams as well as records, MLB draft history, and sabermetrics . Founder Sean Forman began developing the website while working on his Ph.D. dissertation in applied math and computational science at the University of Iowa . While writing his dissertation, he had also been writing articles on and blogging about sabermetrics. Forman's database
136-530: A batter's overall performance including on-base plus slugging , commonly referred to as OPS. OPS adds the hitter's on-base percentage (number of times reached base by any means divided by total plate appearances) to their slugging percentage ( total bases divided by at-bats). Some argue that the OPS formula is flawed and that more weight should be shifted towards OBP (on-base percentage). The statistic wOBA (weighted on-base average) attempts to correct for this. OPS
204-690: A condition of the sale of the Astros to Jim Crane in November 2011, the team agreed to move to the American League effective with the 2013 season. In 2023, National League teams played 46 regular season interleague games against all 15 American League teams, 23 at home and 23 on the road. As of the end of the 2024 season, the Dodgers have won the most NL pennants, with 25. Representing the National League against
272-479: A more "traditional" or "pure" league, the National League did not adopt the designated hitter rule until the shortened 2020 season . Only the American League previously adopted the rule in 1973. In theory, this meant that the role of the manager was greater in the National League than in the American League, because the NL manager must take offense into account when making pitching substitutions and vice versa. However, this
340-481: A pitcher per nine innings, less errors and other events out of the pitcher's control) have dominated attention in the statistical world of baseball. However, the recent advent of sabermetrics has created statistics drawing from a greater breadth of player performance measures and playing field variables. Sabermetrics and comparative statistics attempt to provide an improved measure of a player's performance and contributions to his team from year to year, frequently against
408-401: A pitcher's performance regardless of the strength of the defensive players behind them. All of the above statistics may be used in certain game situations. For example, a certain hitter's ability to hit left-handed pitchers might incline a manager to increase their opportunities to face left-handed pitchers. Other hitters may have a history of success against a given pitcher (or vice versa), and
476-452: A player who leads the league in all of these three statistics earns the " Triple Crown ". For pitchers, wins , ERA , and strikeouts are the most often-cited statistics, and a pitcher leading his league in these statistics may also be referred to as a "triple crown" winner. General managers and baseball scouts have long used the major statistics, among other factors and opinions, to understand player value. Managers, catchers and pitchers use
544-412: A player's dominance and overall productivity against his peers. It also offers sabermetrician Jay Jaffe's system acronymmed "JAWS" method for ranking players of different eras against each other by weighting their primes. Baseball Reference has its own baseball encyclopedia, a wiki called "Baseball Reference Bullpen", which can be edited by anyone and is modeled after Misplaced Pages . As of December 2023,
612-601: A postseason championship—the World Series . Major League Baseball narrowly averted radical reorganization in November 1920. Dissatisfied with American League President and National Baseball Commission head Ban Johnson , NL owners dissolved the league on November 8 during heated talks on MLB reorganization in the wake of the Black Sox Scandal . Simultaneously, three AL teams also hostile to Johnson ( Boston Red Sox , Chicago White Sox , and New York Yankees ) withdrew from
680-523: A second major league in 1901, and the AL and NL engaged in a "baseball war" during 1901 and 1902 before agreeing to a "peace pact" that recognized each other as legitimate "major leagues". As part of this agreement, the leagues agreed to respect player contracts, establish rules about relationships with minor league clubs, and allow their champions to meet in a " World Series " to decide the overall professional baseball championship. National League teams have won 51 of
748-401: A statistical performance average. Comprehensive, historical baseball statistics were difficult for the average fan to access until 1951, when researcher Hy Turkin published The Complete Encyclopedia of Baseball . In 1969, Macmillan Publishing printed its first Baseball Encyclopedia , using a computer to compile statistics for the first time. Known as "Big Mac", the encyclopedia became
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#1733086312422816-640: A version of the World Series seven times during their ten-year coexistence. These contests were less organized than the modern Series, lasting as few as three games and as many as fifteen, with two Series (1885 and 1890) ending in disputed ties. The NL won four times and the AA only once, in 1886. Starting with the Pittsburgh Pirates in 1887, the National League began to raid the American Association for franchises to replace NL teams that folded. This undercut
884-546: Is a website that came out of the Baseball Reference website. The company was incorporated as Sports Reference, LLC in 2007. In 2006, Forman left his job as a math professor at Saint Joseph's University in order to focus on Baseball Reference full-time. In February 2009, Fantasy Sports Ventures took a minority stake in Sports Reference, LLC, the parent company of Baseball Reference, for a "low seven-figure sum". At
952-604: Is also useful when determining a pitcher's level of success. "Opponent on-base plus slugging" (OOPS) is becoming a popular tool to evaluate a pitcher's actual performance. When analyzing a pitcher's statistics, some useful categories include K/9IP (strikeouts per nine innings), K/BB (strikeouts per walk), HR/9 (home runs per nine innings), WHIP (walks plus hits per inning pitched), and OOPS (opponent on-base plus slugging). However, since 2001, more emphasis has been placed on defense-independent pitching statistics , including defense-independent ERA (dERA), in an attempt to evaluate
1020-638: The Cy Young Award and MVP , head-to-head batter vs. pitcher career totals, individual statistical leaders for each season and all-time, managers' career records, the full results of all MLB player drafts, Negro leagues statistics (Baseball Reference added Negro League Statistics to its website in 2021), a baseball encyclopedia (the Bullpen), and box scores and game logs from every MLB game back to 1901 , among other features. To compare ballplayers to one-another it offers "Black Ink" and "Gray Ink" tests, which tally
1088-714: The Houston Astros three years later. In 1969, the league added the San Diego Padres and the Montreal Expos (now the Washington Nationals ), becoming a 12-team league for the first time since 1899. In 1969, as a result of its expansion to 12 teams, the National League—which for its first 93 years had competed equally in a single grouping—was reorganized into two divisions of six teams (respectively named
1156-576: The National League ( NL ), is the older of two leagues constituting Major League Baseball (MLB) in the United States and Canada , and the world's oldest extant professional team sports league. Founded on February 2, 1876, to replace the National Association of Professional Base Ball Players (NAPBBP) of 1871–1875 (often called simply the "National Association"), the NL is sometimes called
1224-782: The National League East and West , although geographically it was more like North and South), with the division champions meeting in the National League Championship Series (an additional round of postseason competition) for the right to advance to the World Series. In 1993 the league expanded to 14 teams, adding the Colorado Rockies and the Florida Marlins (which became the Miami Marlins shortly after
1292-571: The Senior Circuit , in contrast to MLB's other league, the American League , which was founded 25 years later and is called the "Junior Circuit". Both leagues currently have 15 teams. The National League survived competition from various other professional baseball leagues during the late 19th century. Most did not last for more than a few seasons, with a handful of teams joining the NL once their leagues folded. The American League declared itself
1360-402: The 119 World Series championships contested from 1903 to 2023. For decades, Major League baseball clubs only played teams from their own league during the regular season and most of the playoffs, with only their champions facing off in the World Series. This separation gradually caused the leagues to develop slightly different strategies and styles of play. The National League was long considered
1428-454: The AL and joined the eight NL teams in forming a new National League; the 12th team would be whichever of the remaining five AL teams loyal to Johnson first chose to join; if none did so an expansion team would have been placed in Detroit , by far the largest one-team city at that time. Four days later, on November 12, both sides met (without Johnson) and agreed to restore the two leagues and replace
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#17330863124221496-514: The All-Star Game, or in the World Series. Beginning in 1997, however, interleague games have been played during the regular season and count in the standings. Prior to the early 2020s – before the universal designated hitter rule was started in both leagues – as part of the agreement instituting interleague play, the DH rule was used only in games where the American League team was the home team. In 1999,
1564-471: The American Association. After the 1891 season, the AA disbanded and merged with the NL, which became known legally for the next decade as the "National League and American Association". The teams now known as the Cincinnati Reds , Los Angeles Dodgers (originally Brooklyn) and Pittsburgh Pirates (as well as the now-defunct Cleveland Spiders ) had already switched from the AA to the NL prior to 1892. With
1632-677: The American League under the auspices of Major League Baseball, which now operates much like other North American professional sports leagues, albeit with two "leagues" instead of "conferences". By 1875, the National Association of Professional Ball Players (NAPBBP, often referred to as the "National Association"), founded four years earlier, was suffering from a lack of strong authority over clubs, unsupervised scheduling, unstable membership of cities, dominance by one team (the Boston Red Stockings ), and an extremely low entry fee ($ 10) that gave clubs no incentive to abide by league rules when it
1700-577: The American League, the Cardinals have won the most World Series (11) followed by the Giants and Dodgers (8), Pirates (5), and Reds (5). St. Louis also holds the distinction of being the only AA club to defeat an NL club in the 19th-century version of the World Series, having done so against their now-division rival Cubs. The eight charter teams were the following: The eight-team lineup established in 1900 remained unchanged through 1952. All franchises are still in
1768-517: The Baseball Reference Bullpen contains over 109,100 articles. In addition, there are a number of what the website calls "Frivolities." Examples include: Baseball statistics Baseball statistics include a variety of metrics used to evaluate player and team performance in the sport of baseball . Because the flow of a baseball game has natural breaks to it, and player activity is characteristically distinguishable individually,
1836-454: The Central had one more team). A third postseason round was added at the same time: the three division champions plus a wild card team (the team with the best record among those finishing in second place) now advance to the preliminary National League Division Series . Due to a players' strike, however, the postseason was not actually held in 1994. Before the 1998 season, the American League and
1904-612: The NAPBBP because Hulbert had signed them to his club using what were considered questionable means. Hulbert had a great vested interest in creating his own league, and after recruiting St. Louis privately, four western clubs met in Louisville, Kentucky , in January 1876. With Hulbert speaking for the five later in New York City on February 2, 1876, the National League of Professional Base Ball Clubs
1972-486: The NL did not have teams, offered Sunday games and alcoholic beverages in locales where permitted, and sold cheaper tickets everywhere (25 cents versus the NL's standard 50 cents, a hefty sum for many in 1882). The NL struck back by establishing new clubs in 1883 in AA cities Philadelphia (later called "Phillies") and New York (the team that would become the Giants). The National League and the American Association participated in
2040-462: The NL to modify its labor practices, including a salary cap and a reserve clause that bound players to their teams indefinitely. The NL suffered many defections of star players to the Players' League, but the P.L. collapsed after one season. The Brooklyn, Chicago, Pittsburgh, and New York franchises of the NL absorbed their Players' League counterparts. The labor strike of 1890 hastened the downfall of
2108-509: The NL. By 1903, the upstart AL had placed new teams in the National League cities of Boston , Chicago, New York, Philadelphia , and St. Louis , as well as the "abandoned" NL cities Cleveland and Washington (and, temporarily, Baltimore). Only the Cincinnati Reds and Pittsburgh Pirates had no AL team in their markets. The AL among other things enforced a strict conduct policy among its players. The National League at first refused to recognize
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2176-481: The National League each added a fifteenth team. Because of the odd number of teams, only seven games could possibly be scheduled in each league on any given day. Thus, one team in each league would have to be idle on any given day. This would have made it difficult for scheduling, in terms of travel days and the need to end the season before October. In order for MLB officials to continue primarily intraleague play, both leagues would need to carry an even number of teams, so
2244-589: The West Coast of the U.S. for the first time. The NL remained an eight-team league for over 60 years. (For the eight teams, see Expansion (1887–1899) above, and "Classic Eight" below.) In 1962—facing competition from the proposed Continental League and confronted by the American League 's unilateral expansion in 1961—the NL expanded by adding the New York Mets and the Houston Colt .45s. The "Colts" were renamed
2312-603: The behavior of teammates that he quit playing in 1891 to become one of America's most famous evangelical Christian preachers. Most fans appear to have felt the same way, because attendance at games was plummeting by 1900. After eight seasons as a 12-team league, the NL contracted back to eight teams for the 1900 season, eliminating its teams in Baltimore , Cleveland , Louisville (which has never had another major league team since), and Washington . This provided an opportunity for competition. Three of those cities received franchises in
2380-449: The clubs' defiance by expelling them, an act which not only shocked baseball followers (New York and Philadelphia were the two most populous cities in the league) and the then sports world, but made it clear to clubs that league scheduling commitments, a cornerstone of competitive integrity, were not to be ignored. The National League operated with only six clubs during 1877 and 1878. Over the next several years, various teams joined and left
2448-426: The consistency, standards, and calculations are often incomplete or questionable. Since the National League (NL) was founded in 1876, statistics in the most elite levels of professional baseball have been kept at some level, with efforts to standardize the stats and their compilation improving during the early 20th century. Such efforts have evolved in tandem with advances in available technology ever since. The NL
2516-742: The decision was made to move one club from the AL Central to the NL Central. Eventually, Milwaukee agreed (after Kansas City declined) to change leagues; the National League now had 16 teams, the American League 14 with the switch. Beginning with the 2013 season, the Houston Astros moved from the National League Central to the American League West, which now gave both leagues three divisions of five teams each. Often characterized as being
2584-421: The designated hitter rule in 2022 , and the expansion of interleague play to 46 games beginning in 2023 , has further blurred the lines between leagues. Though both leagues agreed to be jointly governed by a commissioner in 1920, they remained separate legal and business entities with their own president and management. This was the case until after the 1999 season, when the National League legally merged with
2652-568: The end of April 2021, the site changed a number of identifying names, "discontinuing the use of nicknames that are racially or ethnically influenced" and "names based upon a player's disability", such as Chief Bender and Dummy Hoy , who are now listed as Charles Bender and Billy Hoy, respectively. The site has season, career, and minor league records (when available, back to 1888 ) for everyone who has played Major League Baseball, year-by-year team pages, all final league standings, all postseason numbers, voting results for all historic awards such as
2720-585: The end of the 2011 season). In 1998, the Arizona Diamondbacks became the league's fifteenth franchise, and the Milwaukee Brewers moved from the AL to the NL, giving the NL 16 teams for the next 15 seasons. In 1994, the league was again reorganized, into three geographical divisions (East, West and Central , all currently with five teams; from 1994 to 1997 the West had one fewer team, and from 1998 to 2012,
2788-647: The ineffective National Commission with a one-man Commissioner in the person of federal Judge Kenesaw Mountain Landis . The National League circuit remained unchanged from 1900 through 1952. In 1953 the Braves moved from Boston to Milwaukee ; in 1966 they moved again, to Atlanta . In 1958 the Brooklyn Dodgers and the New York Giants moved to Los Angeles and San Francisco, respectively, bringing major league baseball to
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2856-399: The institution of interleague play, little remains to differentiate between the two leagues. By 2011, MLB had changed its policy on interleague play, deciding to schedule interleague games throughout the season rather than only during specially designated periods. This policy would allow each league to have 15 teams, with one team in each league playing an interleague game on any given day. As
2924-695: The league: the Chicago Cubs and the Atlanta Braves (originally in Boston, and later Milwaukee). The Cubs are the only charter member to play continuously in the same city. The other two pre-1892 teams still in the league are the Philadelphia Phillies and the San Francisco Giants (originally New York), both of which joined in 1883. The National League became a 12-team circuit with monopoly status for
2992-544: The manager may use this information to create a favorable match-up. This is often referred to as "playing the percentages". The advent of the Statcast system as caused a change in tracking statistics in the modern game. The following listings include abbreviations and/or acronyms for both historic baseball statistics and those based on modern mathematical formulas known popularly as "metrics". The explanations below are for quick reference and do not fully or completely define
3060-630: The merger, the NL absorbed the St. Louis Browns (now known as the St. Louis Cardinals ), along with three other teams that did not survive into the 20th century—the Baltimore Orioles (not the current MLB team), Louisville Colonels , and Washington Statesmen . While four teams that moved from the AA remain in the NL today (Pittsburgh [1887], Cincinnati [1890], Los Angeles [originally Brooklyn; 1890], and St. Louis [1892]), only two original NL franchises (1876) remain in
3128-466: The more "traditional" league, a reputation most exemplified by the NL's more prevalent use of " smallball " tactics and lack of a designated hitter rule, which the AL implemented in 1973. However, with the advent of free agency in the 1970s allowing for more player movement between leagues, and the introduction of regular season interleague play in 1997, the difference in play between the two major leagues has diminished considerably. The NL's adoption of
3196-466: The new league, but reality set in as talent and money was split between the two leagues, diluting the league and decreasing financial success. After two years of bitter contention, a new version of the National Agreement was signed in 1903. This meant formal acceptance of each league by the other as an equal partner in major-league baseball, mutual respect of player contracts, and an agreement to play
3264-419: The newly christened American League (AL) when the minor Western League changed its name to the AL in 1900, with the approval of the NL, which regarded the AL as a lesser league since they were a party to the National Agreement. The AL declined to renew its National Agreement membership when it expired the next year, and on January 28, 1901, the AL officially declared itself a second major league in competition with
3332-494: The offices of American League and National League presidents were discontinued and all authority was vested in the Commissioner's office. The leagues subsequently appointed "honorary" presidents to carry out ceremonial roles such as the awarding of league championship trophies. Additionally, the distinction between AL and NL umpires was erased, and instead all umpires were unified under MLB control. Following these actions, as well as
3400-452: The presence of the pitcher in the NL batting order. As the collective bargaining agreement came closer to expiring after the 2021 season, owners expressed their intentions to use the designated hitter in all games starting in 2022. In response to the COVID-19 pandemic in 2020, rule changes were instituted in both leagues for the 2020 season , which included an abbreviated 60-game schedule,
3468-402: The rest of the decade. The league became embroiled in numerous internal conflicts, not the least of which was a plan supported by some owners (and bitterly opposed by others) to form a "trust", wherein there would be one common ownership of all twelve teams. The NL used its monopsony power to force a $ 2,400 ($ 85,000 today) limit on annual player wages in 1894. As the 20th century dawned, the NL
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#17330863124223536-461: The sport lends itself to easy record-keeping and thus both compiling and compiling statistics . Baseball "stats" have been recorded since the game's earliest beginnings as a distinct sport in the middle of the nineteenth century, and as such are extensively available through the historical records of leagues such as the National Association of Professional Base Ball Players and the Negro leagues , although
3604-613: The stability of the AA. Other new leagues that rose to compete with the National League were the Union Association and the Players' League . The Union Association was established in 1884 and folded after playing only one season, its league champion St. Louis Maroons joining the NL. The Players' League was established in 1890 by the Brotherhood of Professional Base-Ball Players, the sport's first players' union, which had failed to persuade
3672-455: The standard baseball reference until 1988, when Total Baseball was released by Warner Books using more sophisticated technology. The publication of Total Baseball led to the discovery of several "phantom ballplayers", such as Lou Proctor , who did not belong in official record books and were removed. Throughout modern baseball, a few core statistics have been traditionally referenced – batting average , RBI , and home runs . To this day,
3740-486: The stands of the South End Grounds started a fire. The blaze quickly got out of hand and swept through downtown Boston, destroying or damaging 100 buildings. Team owners argued with each other, and players hated the NL's $ 2,400 salary cap. Many teams also ran into trouble with city governments that forbade recreational activities on Sunday . Billy Sunday , a prominent outfielder in the 1880s, became so disgusted with
3808-691: The state capital of Albany, New York ), Worcester ( Massachusetts ), Boston , and Providence . In 1883, new New York and Philadelphia clubs began National League play. Both teams remain in the NL today, the Phillies in their original city and the New York franchise (later named Giants) now in San Francisco since 1958. The NL encountered its first strong rival organization when the American Association began play in 1882. The AA played in cities where
3876-666: The statistic; for the strict definition, see the linked article for each statistic. It is difficult to determine quantitatively what is considered to be a "good" value in a certain statistical category, and qualitative assessments may lead to arguments. Using full-season statistics available at the Official Site of Major League Baseball for the 2004 through 2015 seasons, the following tables show top ranges in various statistics, in alphabetical order. For each statistic, two values are given: National League (baseball) The National League of Professional Baseball Clubs , known simply as
3944-416: The statistics of batters of opposing teams to develop pitching strategies and set defensive positioning on the field. Managers and batters study opposing pitcher performance and motions in attempting to improve hitting. Scouts use stats when they are looking at a player who they may end up drafting or signing to a contract. Some sabermetric statistics have entered the mainstream baseball world that measure
4012-457: The struggling league. By 1880, six of the eight charter members had folded. The two remaining original NL franchises, Boston and Chicago, remain still in operation today as the Atlanta Braves and the Chicago Cubs . When all eight participants for 1881 returned for 1882—the first off-season without turnover in membership—the "circuit" consisted of a zig-zag line connecting the eight cities: Chicago , Detroit , Cleveland , Buffalo , Troy (near
4080-417: The use of the designated hitter in all games, and expanded rosters. The National League reverted to its old batting rules during the 2021 season , but starting with the 2022 season , they permanently adopted the designated hitter rule after a new CBA was ratified. For the first 96 years of its coexistence with the American League, National League teams faced their AL counterparts only in exhibition games,
4148-453: Was disputed by some, such as former Detroit Tigers manager Jim Leyland , who claimed that the American League is more difficult because AL managers are required to know exactly when to pull a pitcher, whereas an NL manager merely pulls his pitcher when that spot comes up in the batting order. Overall, there were fewer home runs and runs scored in the National League than in the American, due to
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#17330863124224216-533: Was established with eight charter members, as follows: The National League's formation meant the end of the old National Association after only five seasons, as its remaining clubs shut down or reverted to amateur or minor league status. The only strong club from 1875 excluded in 1876 was a second one in Philadelphia, often called the White Stockings or later Phillies . The first game in National League history
4284-469: Was in trouble. Conduct among players was poor, and fistfights were a common sight at games. In addition to fighting each other, they fought with the umpires and often filled the air at games with foul language and obscenities. A game between the Orioles and Boston Beaneaters (a precursor to today's Atlanta Braves) in 1894 ended up having tragic consequences when players became engaged in a brawl and several boys in
4352-488: Was inconvenient to them. William A. Hulbert (1832–1882), a Chicago businessman and an officer of the Chicago White Stockings of 1870–1889, approached several NA clubs with the plans for a professional league for the sport of baseball with a stronger central authority and exclusive territories in larger cities only. Additionally, Hulbert had a problem: five of his star players were threatened with expulsion from
4420-568: Was joined by the American League (AL) in 1903; together the two constitute contemporary Major League Baseball . New advances in both statistical analysis and technology made possible by the " PC revolution " of the 1980s and 1990s have driven teams and fans to evaluate players by an ever-increasing set of new statistics, which hold them to ever-evolving standards. With the advent of many of these methods, players can conditionally be compared across different time eras and run scoring environments. The practice of keeping records of player achievements
4488-702: Was originally built from the Total Baseball series of baseball encyclopedias . The website went online in April 2000, after first being launched in February 2000 as part of the website for the Big Bad Baseball Annual . It was originally built as a web interface to the Lahman Baseball Database , though it now employs a variety of data sources. In 2004, Forman founded Sports Reference . Sports Reference
4556-627: Was played on April 22, 1876, at Philadelphia 's Jefferson Street Grounds , at 25th & Jefferson Streets, between the Philadelphia Athletics and the Boston baseball club. Boston won the game 6–5. The new league's authority was soon tested after the first season. The Athletic and Mutual clubs fell behind in the standings and refused to make western road trips late in the season, preferring to play games against local non-league competition to recoup some of their financial losses rather than travel extensively incurring more costs. Hulbert reacted to
4624-429: Was started in the 19th century by English-American sportswriter Henry Chadwick . Based on his experience with the sport of cricket , Chadwick devised the predecessors to modern-day statistics including batting average , runs scored, and runs allowed . Traditionally, statistics such as batting average (the number of hits divided by the number of at bats) and earned run average (the average number of runs allowed by
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