Baseball is a bat-and-ballsport played between two teams of nine players each. The goal of baseball is to score runs by hitting a thrown ball with a bat and touching a series of four markers called bases arranged at the corners of a ninety-foot square, or diamond. Players on one team (the offense) take turns hitting while the other team (the defense) tries to stop them from scoring runs by getting hitters out in any of several ways. A player on offense can stop at any of the bases and hope to score on a teammate's hit. The teams switch between offense and defense whenever the team on defense gets three outs. One turn on offense for each team constitutes an inning; nine innings make up a professional game. The team with the most runs at the end of the game wins.
Baseball on the professional, amateur, and youth levels is popular in North America, Central America, parts of South America, parts of the Caribbean, and parts of East Asia and Southeast Asia. The modern version of the game developed in North America beginning in the eighteenth century. The consensus of historians is that it evolved from earlier bat-and-ball games, such as rounders, brought to the continent by British and Irish immigrants. By the late nineteenth century, baseball was widely recognized as the national sport of the United States. The game is sometimes referred to as hardball in contrast to the very similar game of softball.
In North America, professional Major League Baseball teams are divided into the National League (NL) and American League (AL). Each league has three divisions: East, West, and Central. Every year, the champion of Major League Baseball is determined by playoffs culminating in the World Series. Four teams make the playoffs from each league: the three regular season division winners, plus one wild card team. The wild card is the team with the best record among the non–division winners in the league. In the National League, the pitcher is required to bat, per the traditional rules. In the American League, there is a tenth player, a designated hitter, who bats for the pitcher. Each major league team has a "farm system" of minor league teams at various levels. These teams allow younger players to develop as they gain on-field experience against opponents with similar levels of skill.
The infield, containing the four bases, is for general defensive purposes bounded by the foul lines and within the grass(or AstroTurf) line (see figure).
The outfield is the grassed area beyond the infield grass line between the foul lines, and bounded by a wall or fence.
Foul territory is the entire area outside the foul lines.
The pitcher's mound is located in the center of the infield. It is an 18 foot (5.5 m) diameter mound of dirt no higher than 10 inches (25.4 cm). Near the center of the mound is the pitching rubber, a rubber slab positioned 60 feet 6 inches (18.4 m) from home plate. The pitcher must have one foot on the rubber at the start of every pitch to a batter, but the pitcher may leave the mound area once the ball is released.
At the college/professional level, baseball is played in nine innings in which each team gets one turn to bat and try to score runs while the other pitches and defends in the field. High school baseball plays seven innings and Little League uses six inning games. An inning is broken up into two halves in which the away team bats in the top (first) half, and the home team bats in the bottom (second) half. In baseball, the defense always has the ball — a fact that differentiates it from most other team sports. The teams switch every time the defending team gets three players of the batting team out. The winner is the team with the most runs after nine innings. If the home team is ahead after the top of the ninth, play does not continue into the bottom half. In the case of a tie, additional innings are played until one team comes out ahead at the end of an inning. If the home team takes the lead anytime during the bottom of the ninth or of any inning thereafter, play stops and the home team is declared the winner.
A batter follows through after swinging at a pitched ball.
The basic contest is always between the pitcher for the fielding team, and a batter. The pitcher throws—pitches—the ball towards home plate, where the catcher for the fielding team waits (in a crouched stance) to receive it. Behind the catcher stands the home plate umpire. The batter stands in one of the batter's boxes and tries to hit the ball with a bat. The pitcher must keep one foot in contact with the top or front of the pitcher's rubber — a 24" x 6" (~ 61 cm x 15 cm) plate located atop the pitcher's mound — during the entire pitch, so he can only take one step backward and one forward in delivering the ball. The catcher's job is to receive any pitches that the batter does not hit and to "call" the game by a series of hand movements that signal to the pitcher what pitch to throw and where. If the pitcher disagrees with the call, he will "shake off" the catcher by shaking his head; he accepts the sign by nodding. Each team has a different set of signals, though the number 1 is almost universal as a fast ball. The catcher's role becomes more crucial depending on how the game is going, and how the pitcher responds to a given situation. Each pitch begins a new play, which might consist of nothing more than the pitch itself.
Each half-inning, the goal of the defending team is to get three members of the other team out. A player who is out must leave the field and wait for his next turn at bat. There are many ways to get batters and baserunners out; some of the most common are catching a batted ball in the air, tag outs, force outs, and strikeouts. After the fielding team has put out three players from the opposing team, that half of the inning is over and the team in the field and the team at bat switch places; there is no upper limit to the number that may bat in rotation before three outs are recorded. Going through the entire order in an inning is referred to as "batting around". It is indicative of a high scoring inning. A complete inning consists of each opposing side having a turn (three outs) on offense.
The goal of the team at bat is to score more runs than the opposition; a player may do so only by batting, then becoming a base runner, touching all the bases in order (via one or more plays), and finally touching home plate. To that end, the goal of each batter is to enable baserunners to score or to become a baserunner himself. The batter attempts to hit the ball into fair territory — between the baselines — in such a way that the defending players cannot get them or the baserunners out. In general, the pitcher attempts to prevent this by pitching the ball in such a way that the batter cannot hit it cleanly or, ideally, at all.
A baserunner who successfully touches home plate after touching all previous bases in order scores a run. In an enclosed field, a fair ball hit over the fence on the fly is normally an automatic home run, which entitles the batter and all runners to touch all the bases and score. A home run hit with all bases occupied ('bases loaded') is called a grand slam.
The squad in the field is the defensive team; they attempt to prevent the baserunners from scoring. There are nine defensive positions, but only two have a mandatory location (pitcher and catcher). The locations of the other seven fielders is not specified by the rules, except that at the moment the pitch is delivered they must be positioned in fair territory and not in the space between the pitcher and the catcher. These fielders often shift their positioning in response to specific batters or game situations, and they may exchange positions with one another at any time. The nine positions most commonly used (with the number scorekeepers use) are: pitcher (1), catcher (2), first baseman (3), second baseman (4), third baseman (5), shortstop (6), left fielder (7), center fielder (8), and right fielder (9). Note that, in rare cases, teams may use dramatically differing schemes, such as switching an outfielder for an infielder. The numbering convention was established by Henry Chadwick. The reason the shortstop seems out of order has to do with the way fielders positioned themselves in the early years of the game.
The battery
The battery is composed of the pitcher, who stands on the rubber of the mound, which is also known as the pitching plate, and the catcher, who squats behind home plate. These are the two fielders who always deal directly with the batter on every pitch, hence the term "battery", coined by Henry Chadwick and later reinforced by the implied comparison to artillery fire.
The pitcher's main role is to pitch the ball toward home plate with the goal of getting the batter out. Pitchers also play defense by fielding batted balls, covering bases (for a potential tag out or force out on an approaching runner), or backing up throws. The catcher's main role is to receive the pitch if the batter does not hit it. Together with the pitcher and coaches, the catcher plots game strategy by suggesting different pitches and by shifting the starting positions of the other fielders. Catchers are also responsible for defense in the area near home plate.
The infielders
The four infielders are the first baseman, second baseman, shortstop, and third baseman. Originally the first, second and third basemen played very near their respective bases, and the shortstop generally played "in" (hence the term), covering the area between second, third, and the pitchers box, or wherever the game situation required. As the game evolved, the fielding positions changed to the now-familiar "umbrella", with the first and third baseman generally positioned a short distance toward second base from their bases, the second baseman to the right side of second base standing farther away from the base than any other infielder, and the shortstop playing to the left of second base, as seen from the batter's perspective, filling in the gaps.
The first baseman's job consists largely of making force plays at first base on ground balls hit to the other infielders. When an infielder picks up a ball from the ground hit by the batter, he must throw it to the first baseman who must catch the ball and maintain contact with the base before the batter gets to it for the batter to be out. The need to do this quickly often requires the first baseman to stretch one of his legs to touch first base while catching the ball simultaneously. The first baseman must be able to catch the ball very well and usually wears a specially designed mitt. The first baseman fields balls hit near first base. The first baseman also has to receive throws from the pitcher in order to tag runners out who have reached base safely. The position is less physically challenging than the other positions, but there is still a lot of skill involved. Infielders don't always make good throws to first base, so it is the first baseman's job to field any ball thrown toward him cleanly. Older players who can no longer fulfill the demands of their original positions also often become first basemen.
The second baseman covers the area to the first-base side of second base and provides backup for the first baseman in bunt situations. He also is a cut-off for the outfield. This is when the outfielder doesn't have to throw the full distance from him/her to the base, but just to the cut-off. The shortstop fills the critical gap between second and third bases — where right-handed batters generally hit ground balls — and also covers second or third base and the near part of left field. This player is also a cut-off for the outfield. This position is the most demanding defensively, so a good shortstop doesn't need to necessarily be a good batter. The third baseman's primary requirement is a strong throwing arm, in order to make the long throw across the infield to the first baseman. Quick reaction time is also important for third basemen, as they tend to see more sharply hit balls than the other infielders, thus the nickname for third base as the "hot corner." Also, because there are far more right-handed hitters than lefties, there are more ground balls hit to the left side of the infield due to the natural motion of the batter's swing.
The outfielders
The three outfielders, left fielder, center fielder, and right fielder, are so named from the catcher's perspective looking out onto the field. The right fielder generally has the strongest arm of all the outfielders due to the need to make throws on runners attempting to take third base. The center fielder has more territory to cover than the corner outfielders, so this player must be quick and agile with a strong arm to throw balls in to the infield; as with the shortstop, teams tend to emphasize defense at this position. Also, the center fielder is considered the outfield leader, and left- and right-fielders often cede to his direction when fielding fly balls. Of all outfielders, the left fielder often has the weakest arm, as they generally do not need to throw the ball as far in order to prevent the advance of any baserunners. The left fielder still requires good fielding and catching skills, and tends to receive more balls than the right fielder due to the fact that right-handed hitters, who are much more common, tend to "pull" the ball into left field. Each outfielder runs to "back up" a nearby outfielder who attempts to field a ball hit near both their positions. Outfielders also run to back up infielders on batted balls and thrown balls, including pick-off attempts from the pitcher or from the catcher.
^ Block, David (2006). Baseball Before We Knew It: A look at something I don't remember. Bison Books. 0803262558.
^ Szymanski, Stefan, and Andrew S. Zimbalist (2006). National Pastime: How Americans Play Baseball and the Rest of the World Plays Soccer (Brookings Institution Press, 2005), , p. 220, n. 19.
^ The "third strike rule", which has been on the books since the time of the Knickerbocker Rules, is that the batter can try to advance to first base on the third strike, if the third strike is not caught. However, the batter is not permitted to advance if first base is occupied, unless there are already two outs. This is to prevent the catcher from dropping the ball on purpose and setting up a potential double or triple play. The underlying concept is the same as the "Infield Fly Rule", to curb defensive shenanigans. Both rules change when there are two outs, because then there is no defensive advantage to dropping the ball on purpose. Statistically, such a play still counts as a strikeout for the pitcher, plus either a passed ball charged to the catcher or a wild pitch charged to the pitcher, so if the batter advances safely to first on such a play, it is possible for a pitcher to record 4 (or more) strikeouts in one inning. Such has happened several dozen times in the history of the major leagues, and at least one time in the minor leagues a pitcher has recorded 5.
^ An informative account of the use of statistics throughout baseball history is Alan Schwarz, The Numbers Game: Baseball’s Lifelong Fascination with Statistics (New York: St. Martin's, 2005) ().
Sources and further reading
Published
Robert K. Barney and Nancy Bouchier, "A Critical Examination of a Source in Early Ontario Baseball: The Reminiscence of Adam E. Ford," Journal of Sport History (1988)
Joe Brinkman and Charlie Euchner, The Umpire's Handbook, rev. ed. (1987)
Bob Elliott, The Northern Game: Baseball the Canadian Way (Sport Classic, 2005)
Charles Euchner, The Last Nine Innings: Inside the Real Game Fans Never See (2006)
William Humber, Diamonds of the North: A Concise History of Baseball in Canada (Oxford University Press, 1995)
Bill James and John Dewan, Bill James Presents the Great American Baseball Stat Book, ed. by Geoff Beckman et al. (1987)
Bill James, The New Bill James Historical Baseball Abstract ()
Mark Kearney, "Baseball's Canadian Roots: Abner Who?" The Beaver: Exploring Canada's History (October-November 1994)
Michael Mandelbaum, The Meaning of Sports (PublicAffairs) ()
Robert Peterson, Only the Ball Was White (1984 [1970])
Joseph L. Reichler (ed.), The Baseball Encyclopedia, 7th rev. ed. (1988)
Lawrence Ritter and Donald Honig, The Image of Their Greatness: An Illustrated History of Baseball from 1900 to the Present, updated ed. (1984)
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