Baseball is a bat-and-ball sport played between two team sport of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play beginning when a player on the fielding team, called the pitcher, throws a ball that a player on the batting team, called the batter, tries to hit with a baseball bat. The objective of the offensive team (batting team) is to hit the ball into the field of play, away from the other team's players, allowing its players to run the bases, having them advance counter-clockwise around four bases to score what are called "runs". The objective of the defensive team (referred to as the fielding team) is to prevent batters from becoming Base running, and to prevent runners base running. A run is scored when a runner legally advances around the bases in order and touches home plate (the place where the player started as a batter).
The initial objective of the batting team is to have a player reach first base safely; this occurs either when the batter hits the ball and reaches first base Force play an opponent retrieves the ball and touches the base, or when the pitcher persists in throwing the ball out of the batter's reach. Players on the batting team who reach first base without being called "out" can attempt to advance to subsequent bases as a runner, either immediately or during teammates' turns batting. The fielding team tries to prevent runs by using the ball to get batters or runners "out", which forces them out of the field of play. The pitcher can get the batter out by throwing three pitches which result in strikes, while fielders can get the batter out by catching a batted ball before it touches the ground, and can get a runner out by Tag out them with the ball while the runner is not touching a base.
The opposing teams switch back and forth between batting and fielding; the batting team's turn to bat is over once the fielding team records three outs. One turn batting for each team constitutes an inning. A game is usually composed of nine innings, and the team with the greater number of runs at the end of the game wins. Most games end after the ninth inning, but if scores are tied at that point, extra innings are usually played. Baseball has no game clock, though some competitions feature pace-of-play regulations such as a pitch clock to shorten game time.
Baseball evolved from older bat-and-ball games already being played in England by the mid-18th century. This game was brought by immigrants to North America, where the modern version developed. Baseball's American origins, as well as its reputation as a source of escapism during troubled points in American history such as the American Civil War and the Great Depression, have led the sport to receive the moniker of "America's Pastime"; since the late 19th century, it has been unofficially recognized as the national sport of the United States, though in modern times is considered less popular than other sports, such as American football. In addition to North America, baseball spread throughout the rest of the Americas and the Asia–Pacific in the 19th and 20th centuries, and is now considered the most popular sport in parts of Central America and South America, the Caribbean, and East Asia, particularly in Japan, South Korea, and Taiwan.
In Major League Baseball (MLB), the highest level of professional baseball in the United States and Canada, teams are divided into the National League (NL) and American League (AL), each with three divisions: East, West, and Central. The MLB champion is determined by playoffs that culminate in the World Series. The top level of play is similarly split in Japan between the Central League and and in Cuba between the West League and East League. The World Baseball Classic, organized by the World Baseball Softball Confederation, is the major international competition of the sport and attracts the top national teams from around the world. Baseball was played at the Olympic Games from 1992 to 2008, and was reinstated on a one-off basis in 2020.
The goal of the game is to score more points (runs) than the other team. The players on the team at bat attempt to score runs by touching all four bases, in order, set at the corners of the square-shaped baseball field. A player bats at home plate and must attempt to safely reach a base before proceeding, counterclockwise, from first base, to second base, third base, and back home to score a run. The team in the field attempts to prevent runs from scoring by recording outs, which remove opposing players from offensive action until their next turn at bat comes up again. When three outs are recorded, the teams switch roles for the next half-inning. If the score of the game is tied after nine innings, extra innings are played to resolve the contest. Many amateur games, particularly unorganized ones, involve different numbers of players and innings.Thurston (2000), p. 15;
The game is played on a field whose primary boundaries, the foul lines, extend forward from home plate at 45-degree angles. The 90-degree area within the foul lines is referred to as fair territory; the 270-degree area outside them is foul territory. The part of the field enclosed by the bases and several yards beyond them is the infield; the area farther beyond the infield is the outfield. In the middle of the infield is a raised pitcher's mound, with a rectangular rubber plate (the rubber) at its center. The outer boundary of the outfield is typically demarcated by a raised fence, which may be of any material and height. The fair territory between home plate and the outfield boundary is baseball's field of play, though significant events can take place in foul territory, as well.
There are three basic tools of baseball: the ball, the baseball bat, and the baseball glove:
Any runners already on base may attempt to advance on batted balls that land, or contact the ground, in fair territory, before or after the ball lands. A runner on first base must attempt to advance if a ball lands in play, as only one runner may occupy a base at any given time; the same applies for other runners if they are on a base that a teammate is forced to advance to. If a ball hit into play rolls foul before passing through the infield, it becomes dead and any runners must return to the base they occupied when the play began. If the ball is hit in the air and caught before it lands, the batter has flyout and any runners on base may attempt to advance only if they tag up (contact the base they occupied when the play began, as or after the ball is caught). Runners may also attempt to advance to the next base while the pitcher is in the process of delivering the ball to home plate; a successful effort is a stolen base.
While the team at bat is trying to score runs, the team in the field is attempting to record outs. In addition to the strikeout and flyout, common ways a member of the batting team may be put out include the ground out, force play, and tag out. These occur either when a runner is forced to advance to a base, and a fielder with possession of the ball reaches that base before the runner does, or the runner is touched by the ball, held in a fielder's hand, while not on a base. (The batter-runner is always forced to advance to first base, and any other runners must advance to the next base if a teammate is forced to advance to their base.) It is possible to record two outs in the course of the same play. This is called a double play. Three outs in one play, a triple play, is possible, though rare. Players put out or retired must leave the field, returning to their team's dugout or bench. A runner may be stranded on base when a third out is recorded against another player on the team. Stranded runners do not benefit the team in its next turn at bat as every half-inning begins with the bases empty.
A runner may circle the bases only once per plate appearance and thus can score at most a single run per batting turn. Once a player has completed a plate appearance, that player may not bat again until the eight other members of the player's team have all taken their turn at bat in the batting order. The batting order is set before the game begins, and may not be altered except for substitutions. Once a player has been removed for a substitute, that player may not reenter the game. Children's games often have more lenient rules, such as Little League rules, which allow players to be substituted back into the same game.Thurston (2000), p. 100;
If the designated hitter (DH) rule is in effect, each team has a tenth player whose sole responsibility is to bat (and run). The DH takes the place of another player—almost invariably the pitcher—in the batting order, but does not field. Thus, even with the DH, each team still has a batting order of nine players and a fielding arrangement of nine players.Porterfield (2007), p. 19; Thurston (2000), p. 153;
Most baseball leagues worldwide have the DH rule, including MLB, Pacific League, and Caribbean professional leagues, along with major American amateur organizations. The Central League in Japan does not have the rule and high-level minor league clubs connected to National League teams are not required to field a DH. In leagues that apply the designated hitter rule, a typical team has nine offensive regulars (including the DH), five starting pitchers, seven or eight relievers, a backup catcher, and two or three other reserve players.
With a runner on base and taking a lead, the pitcher may attempt a pickoff, a quick throw to a fielder covering the base to keep the runner's lead in check or, optimally, effect a tag out.
By the early 1830s, there were reports of a variety of uncodified bat-and-ball games recognizable as early forms of baseball being played around North America.Block (2005), pp. 4–5, 11–15, 25, 33, 59–61, et. seq. The first officially recorded baseball game in North America was played in Beachville, Ontario, Canada, on June 4, 1838. In 1845, Alexander Cartwright, a member of New York City's Knickerbocker Club, led the codification of the so-called Knickerbocker Rules,Sullivan (1997), p. 292. which in turn were based on rules developed in 1837 by William R. Wheaton of the Gotham Club. While there are reports that the New York Knickerbockers played games in 1845, the contest long recognized as the first officially recorded baseball game in U.S. history took place on June 19, 1846, in Hoboken, New Jersey: the "New York Nine" defeated the Knickerbockers, 23–1, in four innings.Sullivan (1997), pp. 32, 80, 95. With the Knickerbocker code as the basis, the rules of modern baseball continued to evolve over the next half-century.Tygiel (2000), pp. 8–14; Rader (2008), pp. 71–72. The game then went on to spread throughout the Pacific Rim and the Americas,
The National Agreement of 1903 formalized relations both between the two major leagues and between them and the National Association of Professional Base Ball Leagues, representing most of the country's minor professional leagues.Rader (2008), p. 110; Zimbalist (2006), p. 22. See The World Series, pitting the two major league champions against each other, was inaugurated that fall.Sullivan (1997), pp. 13–16. The Black Sox Scandal of the 1919 World Series led to the formation of the office of the Commissioner of Baseball.Powers (2003), pp. 39, 47, 48. The first commissioner, Kenesaw Mountain Landis, was elected in 1920. That year also saw the founding of the Negro National League; the first significant Negro league, it would operate until 1931. For part of the 1920s, it was joined by the Eastern Colored League.Burgos (2007), pp. 117, 118.
Many minor league teams disbanded when World War II led to a player shortage. Chicago Cubs owner Philip K. Wrigley led the formation of the All-American Girls Professional Baseball League to help keep the game in the public eye. The first crack in the unwritten agreement barring blacks from white-controlled professional ball occurred in 1945: Jackie Robinson was signed by the National League's Brooklyn Dodgers and began playing for their minor league Montreal Royals.Burgos (2007), p. 158. In 1947, Robinson broke the major leagues' color barrier when he debuted with the Dodgers.Burgos (2007), pp. 180, 191. Latin-American players, largely overlooked before, also started entering the majors in greater numbers. In 1951, two Chicago White Sox, Venezuelan-born Chico Carrasquel and black Cuban-born Minnie Miñoso, became the first Hispanic All-Stars.Powers (2003), p. 111. Integration proceeded slowly: by 1953, only six of the 16 major league teams had a black player on the roster.
In 2001, Barry Bonds established the current record of 73 home runs in a single season. There had long been suspicions that the dramatic increase in power hitting was fueled in large part by the abuse of illegal steroids (as well as by the dilution of pitching talent due to expansion), but the issue only began attracting significant media attention in 2002 and there was no penalty for the use of performance-enhancing drugs before 2004.Rader (2008), pp. 254, 271; Zimbalist (2007), pp. 195, 196; In 2007, Bonds became MLB's all-time home run leader, surpassing Hank Aaron, as total major league and minor league attendance both reached all-time highs.
In 1847, American soldiers played what may have been the first baseball game in Mexico at Parque Los Berros in Xalapa, Veracruz.Terry (1909), p. 506. The first formal baseball league outside of the United States and Canada was founded in 1878 in Cuba, which maintains a rich baseball tradition. The Dominican Republic held its first islandwide championship tournament in 1912.Bjarkman (2004), pp. xxiv. Professional baseball tournaments and leagues began to form in other countries between the world wars, including the Netherlands (formed in 1922), Australia (1934), Japan (1936), Mexico (1937), and Puerto Rico (1938).Bjarkman (2004), pp. 356, 123, 137, xxiv, 11, 233; Gmelch (2006), p. 296. The Japanese major leagues have long been considered the highest quality professional circuits outside of the United States.McNeil (2000), p. 113.
, a Finland variation of baseball, was invented by Lauri Pihkala in the 1920s,
and after that, it has changed with the times and grown in popularity. Picture of Pesäpallo match in 1958 in Jyväskylä, Finland.]]
After World War II, professional leagues were founded in many Latin American countries, most prominently Venezuela (1946) and the Dominican Republic (1955).Bjarkman (2004), pp. xxiv, xxv; Burgos (2007), p. 46. Since the early 1970s, the annual Caribbean Series has matched the championship clubs from the four leading Latin American winter leagues: the Dominican Professional Baseball League, Mexican Pacific League, Puerto Rican Professional Baseball League, and Venezuelan Professional Baseball League. In Asia, South Korea (1982), Taiwan (1990) and China (2003) all have professional leagues.Bjarkman (2004), pp. 362, 368; Gmelch (2006), pp. 100, 75, 59.
The English football club, Aston Villa, were the first British baseball champions winning the 1890 National League of Baseball of Great Britain. The 2020 National Champions were the London Mets. Other European countries have seen professional leagues; the most successful, other than the Dutch league, is the Italian league, founded in 1948.Bjarkman (2004), pp. xv. In 2004, Australia won a surprise silver medal at the Olympic Games. The Confédération Européene de Baseball (European Baseball Confederation), founded in 1953, organizes a number of competitions between clubs from different countries. Other competitions between national teams, such as the Baseball World Cup and the Olympic baseball tournament, were administered by the International Baseball Federation (IBAF) from its formation in 1938 until its 2013 merger with the International Softball Federation to create the current joint governing body for both sports, the World Baseball Softball Confederation (WBSC). Women's baseball is played on an organized amateur basis in numerous countries.
After being admitted to the Olympics as a Olympic sport beginning with the 1992 Games, baseball was dropped from the 2012 Summer Olympic Games at the 2005 International Olympic Committee meeting. It remained part of the 2008 Games. While the sport's lack of a following in much of the world was a factor, more important was MLB's reluctance to allow its players to participate during the major league season. MLB initiated the World Baseball Classic, scheduled to precede its season, partly as a replacement, high-profile international tournament. The inaugural Classic, held in March 2006, was the first tournament involving national teams to feature a significant number of MLB participants. The Baseball World Cup was discontinued after its 2011 edition in favor of an expanded World Baseball Classic.
While nine innings has been the standard since the beginning of professional baseball, the duration of the average major league game has increased steadily through the years. At the turn of the 20th century, games typically took an hour and a half to play. In the 1920s, they averaged just less than two hours, which eventually ballooned to 2:38 in 1960. By 1997, the average American League game lasted 2:57 (National League games were about 10 minutes shorter—pitchers at the plate making for quicker outs than designated hitters). In 2004, Major League Baseball declared that its goal was an average game of 2:45. By 2014, though, the average MLB game took over three hours to complete. The lengthening of games is attributed to longer breaks between half-innings for television commercials, increased offense, more pitching changes, and a slower pace of play, with pitchers taking more time between each delivery, and batters stepping out of the box more frequently. Other leagues have experienced similar issues. In 2008, Nippon Professional Baseball took steps aimed at shortening games by 12 minutes from the preceding decade's average of 3:18.
In 2016, the average nine-inning playoff game in Major League baseball was 3 hours and 35 minutes. This was up 10 minutes from 2015 and 21 minutes from 2014. In response to the lengthening of the game, MLB decided from the 2023 season onward to institute a pitch clock rule to penalize batters and pitchers who take too much time between pitches; this had the effect of shortening 2023 regular season games by 24 minutes on average.
Cricket is more similar to baseball than many other team sports in this regard: while the individual focus in cricket is mitigated by the importance of the batting partnership and the practicalities of tandem running, it is enhanced by the fact that a batsman may occupy the wicket for an hour or much more. There is no statistical equivalent in cricket for the fielding error and thus less emphasis on personal responsibility in this area of play.Morton, Richard, "Baseball in England", Badminton Magazine, August 1896, pp. 157–158: "The scoring is one of the most interesting features in this new importation from America baseball. Every detail of play is recorded, and a man's mistakes are tabulated as well as his successes... A line in a cricket score may read, 'Lockwood, caught Stoddart, bowled J. T. Hearne; 30.'... There is so much that is left out! There is no mention of the fact that O'Brien missed Lockwood before he had scored, and that somebody else failed to take a chance when his score was ten. These are items that go to make cricket history; but there is no record of them in the analysis... The man who catches a ball is thought worthy of mention, but the man who muffs one does not suffer by publicity."
Similarly, there are no regulations at all concerning the dimensions of foul territory. Thus a foul fly ball may be entirely out of play in a park with little space between the foul lines and the stands, but a foulout in a park with more expansive foul ground.Powers (2003), p. 219. A fence in foul territory that is close to the outfield line will tend to direct balls that strike it back toward the fielders, while one that is farther away may actually prompt more collisions, as outfielders run full speed to field balls deep in the corner. These variations can make the difference between a double and a triple or inside-the-park home run.Puhalla, Krans, and Goatley (2003), p. 198; The surface of the field is also unregulated. While the adjacent image shows a traditional field surfacing arrangement (and the one used by virtually all MLB teams with naturally surfaced fields), teams are free to decide what areas will be grassed or bare. Some fields—including several in MLB—use artificial turf. Surface variations can have a significant effect on how ground balls behave and are fielded as well as on baserunning. Similarly, the presence of a roof (seven major league teams play in stadiums with permanent or retractable roofs) can greatly affect how fly balls are played. While football and soccer players deal with similar variations of field surface and stadium covering, the size and shape of their fields are much more standardized. The area out-of-bounds on a football or soccer field does not affect play the way foul territory in baseball does, so variations in that regard are largely insignificant.Puhalla, Krans, and Goatley (2003), p. 207.
These physical variations create a distinctive set of playing conditions at each ballpark. Other local factors, such as altitude and climate, can also significantly affect play. A given stadium may acquire a reputation as a pitcher's park or a hitter's park, if one or the other discipline notably benefits from its unique mix of elements. The most exceptional park in this regard is Coors Field, home of the Colorado Rockies. Its high altitude— above sea level—is partly responsible for giving it the strongest hitter's park effect in the major leagues due to the low air pressure.Keri (2007), pp. 295–301. Wrigley Field, home of the Chicago Cubs, is known for its fickle disposition: a pitcher's park when the strong winds off Lake Michigan are blowing in, it becomes more of a hitter's park when they are blowing out. The absence of a standardized field affects not only how particular games play out, but the nature of team rosters and players' statistical records. For example, hitting a fly ball into right field might result in an easy catch on the warning track at one park, and a home run at another. A team that plays in a park with a relatively short right field, such as the New York Yankees, will tend to stock its roster with left-handed , who can best exploit it. On the individual level, a player who spends most of his career with a team that plays in a hitter's park will gain an advantage in batting statistics over time—even more so if his talents are especially suited to the park. See also Powers (2003), p. 85.
The Official Baseball Rules administered by MLB require the official scorer to categorize each baseball play unambiguously. The rules provide detailed criteria to promote consistency. The score report is the official basis for both the box score of the game and the relevant statistical records. General managers, managers, and baseball scouts use statistics to evaluate players and make strategic decisions.
Certain traditional statistics are familiar to most baseball fans. The basic batting statistics include:
Among the many other statistics that are kept are those collectively known as situational statistics. For example, statistics can indicate which specific pitchers a certain batter performs best against. If a given situation statistically favors a certain batter, the manager of the fielding team may be more likely to change pitchers or have the pitcher intentionally walk the batter in order to face one who is less likely to succeed.See, e.g., Albert, Jim, and Jay Bennett, "Situational Effects", ch. 4 in Curve Ball: Baseball, Statistics, and the Role of Chance in the Game, 2d ed. (Springer, 2003), pp. 71–110.
The growing popularity of sabermetrics since the early 1980s has brought more attention to two batting statistics that sabermetricians argue are much better gauges of a batter's skill than batting average:Guzzo (2007), pp. 20–21, 67; Schwarz (2004), p. 233; Lewis (2003), p. 127.
Some of the new statistics devised by sabermetricians have gained wide use:
Overall, baseball has a large following in the United States; a 2006 poll found that nearly half of Americans are fans. This led to baseball being granted the title of "America's favorite pastime" by many American baseball fans. The game was historically seen as contributing to the melting pot society of the nation, encouraging immigrants to integrate. In the late 1900s and early 2000s, baseball's position compared to football in the United States moved in contradictory directions. In 2008, MLB set a revenue record of $6.5 billion, matching the NFL's revenue for the first time in decades. A new MLB revenue record of more than $10 billion was set in 2017. On the other hand, the percentage of American sports fans polled who named baseball as their favorite sport was 9%, compared to pro football at 37%. In 1985, the respective figures were pro football 24%, baseball 23%. Because there are so many more major league games played, there is no comparison in overall attendance. In 2008, total attendance at major league games was the second-highest in history: 78.6 million, 0.7% off the record set the previous year. The following year, amid the U.S. recession, attendance fell by 6.6% to 73.4 million. Eight years later, it dropped under 73 million. Attendance at games held under the Minor League Baseball umbrella set a record in 2008, with 43.3 million. While MLB games have not drawn the same national TV viewership as football games, MLB games are dominant in teams' local markets and regularly lead all programs in primetime in their markets during the summer. After multiple years of declines since 2017, baseball attendance has grown slightly in recent years. In 2024, attendance was 71.3 million, the highest since 2017.
The sport's overall popularity in Latin America has assisted in integrating Latin American migrants to the United States.
Baseball has grown significantly in China in recent years, with MLB estimating in 2019 that there are 21 million active fans in the country.
Baseball was considered a national pastime in the Philippines in the 1960s and 70s, but the sport has since declined in popularity. Since 2005, there have been efforts to revitalize the sport in the country.
A varsity baseball team is an established part of physical education departments at most high schools and colleges in the United States. In 2015, nearly half a million high schoolers and over 34,000 collegians played on their schools' baseball teams. By early in the 20th century, intercollegiate baseball was Japan's leading sport. Today, high school baseball in particular is immensely popular there.Bjarkman (2004), p. xxiv; Gmelch (2006), pp. 23, 53. The final rounds of the two annual tournaments—the National High School Baseball Invitational Tournament in the spring, and the even more important National High School Baseball Championship in the summer—are broadcast around the country. The tournaments are known, respectively, as Spring Koshien and Summer Koshien after the Koshien Stadium where they are played. In Cuba, baseball is a mandatory part of the state system of physical education, which begins at age six. Talented children as young as seven are sent to special district schools for more intensive training—the first step on a ladder whose acme is the national baseball team.
Baseball has inspired many works of art and entertainment. One of the first major examples, Ernest Thayer's poem "Casey at the Bat", appeared in 1888. A wry description of the failure of a star player in what would now be called a "clutch situation", the poem became the source of vaudeville and other staged performances, audio recordings, film adaptations, and an opera, as well as a host of sequels and parodies in various media. There have been many , including the Academy Awards–winning The Pride of the Yankees (1942) and the Oscar nominees The Natural (1984) and Field of Dreams (1989). The American Film Institute's selection of the ten best sports movies includes The Pride of the Yankees at number 3 and Bull Durham (1988) at number 5. Baseball has provided thematic material for hits on both stage—the Richard Adler–Ross musical Damn Yankees—and record—George J. Gaskin's "Slide, Kelly, Slide", Simon and Garfunkel's "Mrs. Robinson", and John Fogerty's "Centerfield".Zoss (2004), pp. 373–374. The baseball-inspired comedic sketch "Who's on First?", popularized by Abbott and Costello in 1938, quickly became famous. Six decades later, Time named it the best comedy routine of the 20th century.
Literary works connected to the game include the short fiction of Ring Lardner and novels such as Bernard Malamud's The Natural (the source for the movie), Robert Coover's The Universal Baseball Association, Inc., J. Henry Waugh, Prop., John Grisham's Calico Joe and W. P. Kinsella's Shoeless Joe (the source for Field of Dreams). Baseball's literary canon also includes the beat reportage of Damon Runyon; the columns of Grantland Rice, Red Smith, Dick Young, and Peter Gammons; and the essays of Roger Angell. Among the celebrated nonfiction books in the field are Lawrence S. Ritter's The Glory of Their Times, Roger Kahn's The Boys of Summer, and Michael Lewis's . The 1970 publication of major league pitcher Jim Bouton's tell-all chronicle Ball Four is considered a turning point in the reporting of professional sports.
Baseball has also inspired the creation of new cultural forms. were introduced in the late 19th century as . A typical example featured an image of a baseball player on one side and advertising for a business on the other. In the early 1900s they were produced widely as promotional items by tobacco and confectionery companies. The 1930s saw the popularization of the modern style of baseball card, with a player photograph accompanied on the rear by statistics and biographical data. Baseball cards—many of which are now prized collectibles—are the source of the much broader trading card industry, involving similar products for different sports and non-sports-related fields.Zoss (2004), pp. 16–25.
Modern fantasy sports began in 1980 with the invention of Rotisserie League Baseball by New York writer Daniel Okrent and several friends. Participants in a Rotisserie league draft notional teams from the list of active MLB players and play out an entire imaginary season with game outcomes based on the players' latest real-world statistics. Rotisserie-style play quickly became a phenomenon. Now known more generically as fantasy baseball, it has inspired similar games based on an array of different sports.Zoss (2004), pp. 27–31. The field boomed with increasing Internet access and new fantasy sports-related websites. By 2008, 29.9 million people in the United States and Canada were playing fantasy sports, spending $800 million on the hobby. The burgeoning popularity of fantasy baseball is also credited with the increasing attention paid to sabermetrics—first among fans, only later among baseball professionals.Lewis (2003), pp. 86–88.
In popular culture
Derivative games
British baseball
Finnish baseball
See also
Related sports
Citations
General and cited sources
Further reading
External links
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