Baseball

Baseball, game played with a bat, a ball, and gloves between two teams of nine players each on a field with four white bases laid out in a diamond (i.e., a square oriented so that its diagonal line is vertical). Teams alternate positions as batters (offense) and fielders (defense), exchanging places when three members of the batting team are “put out.” As batters, players try to hit the ball out of the reach of the fielding team and make a complete circuit around the bases for a “run.” The team that scores the most runs in nine innings (times at bat) wins the game.

Play of the game

Baseball is a contest between two teams of 9 or (if a designated hitter is allowed to take the pitcher’s turn at bat) 10 players each. The field of play is divided into the infield and the outfield. Within the infield is a square area called the diamond, which has four white bases, one on each corner. The bases are 90 feet (27.4 metres) apart.
The teams alternate between being fielders (playing defense) and batters (playing offense). The nine fielders take up assigned positions in the playing field; one fielder, called the pitcher, stands on a mound in the centre of the diamond and faces the base designated as home plate, where a batter, holding a formed stick (a bat), waits for him to throw a hard leather-covered ball. The goal of the batter is to hit the ball out of the reach of the fielders and eventually (most often with the help of hits by subsequent batters) to run from base to base counterclockwise completely around the diamond, thus scoring a run. If a batter fails to advance in an appropriate manner (discussed later) to at least the first base, he is out; after three outs, the teams switch roles. When both teams have batted, an inning is completed. After nine innings, the team with the most runs wins the game. If there is a tie, extra innings are played.

The ball and bat

The ball has a cork-and-rubber core, around which yarn is tightly wrapped; the cover consists of two snugly fitted pieces of white leather sewn together. The circumference is 9 to 9.25 inches (23 to 23.5 cm) and the weight between 5 and 5.25 ounces (142 and 149 grams). The bat is a smooth rounded stick of solid or laminated wood, not longer than 42 inches (107 cm) or thicker at the barrel end than 2.75 inches (7 cm), tapering to the handle end. (Usually, however, in major league baseball, players prefer a bat no longer than 35 inches [89 cm] that weighs about 30 ounces [850 grams] or less.) There is no weight restriction on the bat, but no metal or other reinforcement can be used in construction of the bat. (Amateur players, however, are permitted to use aluminum bats.) The handle may have tape and adhesive material, such as pine tar, applied to it to improve the grip (but such substances may not be applied more than 18 inches [46 cm] from the tip of the handle in major league play).