Baseball
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fielding mistake is not credited with a hit—instead, the responsible fielder is charged with an error. 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. 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 were at when the play began. If the ball is hit in the air and caught before it lands, the batter has flied out and any runners on base may attempt to advance only if they tag up or touch the base they were at 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. A pitch that is not hit into the field of play is called either a strike or a ball. A batter against whom three strikes are recorded strikes out. A batter
against whom four balls are recorded is awarded a base on balls or walk, a free advance to first base. (A batter may also freely advance to first base if any part of the batter's body or uniform is struck by a pitch before the batter either swings at it or it contacts the ground.) Crucial to determining balls and strikes is the umpire's judgment as to whether a pitch has passed through the strike zone, a conceptual area above home plate extending from the midpoint between the batter's shoulders and belt down to the hollow of the knee. A strike is called when one of the following happens: A ball is called when the pitcher throws a pitch that is outside the strike zone, provided the batter has not swung at it. While the team at bat is trying to score runs, the team in the field is attempting to record outs. Among the various ways a member of the batting team may be put out, five are most common:
* The batter swings at any ball (even one outside the strike zone) and misses.
* The batter hits a foul ball—one that either initially lands in foul territory or initially lands within the diamond but moves into foul territory before passing first or third base. If there are already two strikes on the batter, a foul ball is not counted as a third strike; thus, a foul ball cannot result in the immediate strikeout of the batter. (There is an exception to this exception: a two-strike foul bunt is recorded as a third strike.)