Baseball is a
sport played between two
teams usually of nine players each. It is a
bat-and-ball game in which a
pitcher throws (
pitches) a hard, fist-sized, leather-covered
ball toward a
batter on the opposing team. The batter attempts to hit the baseball with a tapered cylindrical
bat, made of wood (as required in
professional baseball) or a variety of other materials (as allowed in many nonprofessional games). A team scores
runs only when batting, by advancing its players--primarily via
hits,
walks, and the opposition team's fielding
errors--
counterclockwise past a series of three markers called
bases and touching home plate arranged at the corners of a ninety-foot square, or "
diamond." The game is structured around nine segments called
innings. In each inning, both teams are given the opportunity to bat and score runs; a team's half-inning ends when three
outs are recorded against that team. There is no time limit - each game lasts as long or as short as necessary to determine a winner.
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