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Extra innings is the extension of a baseball or softball game in order to break a tie. Ordinarily, a baseball game consists of nine innings (in softball games and high school baseball games there are typically seven innings; in Little League, six), each of which is divided into halves: the visiting team bats first, after which the home team takes its turn at bat. However, if the score remains tied at the end of the regulation number of complete innings, the rules provide that "play shall continue until (1) the visiting team has scored more total runs than the home team at the end of a completed inning; or (2) the home team scores the winning run in an uncompleted inning." The rules of the game, including the batting order, availability of substitute players and pitchers, etc., remain intact in extra innings. Managers must display caution to avoid using all their substitute players, in case the game reaches extensive extra innings. The rules call for a forfeiture if a team is unable to field a full team of nine players. ==Home-field advantage== In Major League Baseball, home teams won about 52% of extra-inning games from 1957 to 2007.〔(【引用サイトリンク】title=Home team record in extra innings » Baseball-Reference Blog » Blog Archive )〕 During this same time period, home teams have won about 54% of all baseball games.〔(【引用サイトリンク】title=Baseball Prospectus - Ahead in the Count: Home-Field Advantages, Part One )〕 So while the home team has some advantage in extra-inning games, this advantage is less noticeable than the initial home-field advantage. Home teams tend to have the greatest advantage in run-scoring during the first 3 innings.〔 For the visiting team to win, it must score as many runs as possible in the first (or "top") half of the inning and then prevent the home team from tying or taking the lead in the bottom half. Because it bats in the second (or "bottom") half of an inning, a home team wins the game by taking the lead at any point in the final inning. If the home team takes the lead in the final inning by virtue of a hit with one or more runners on base, the game will end when the first of those runners comes home and scores a run. No other subsequent runners will be allowed to come home and score, as the game will have already ended with the scoring of the first run. However, if the home team takes a lead in the final inning by virtue of a home run with one or more runners on base, each of those runners will be allowed to score and count in the final score of the game.〔Baseball Explained by Phillip Mahony, McFarland Books, 2014. See (www.baseballexplained.com )〕 Each extra inning simply repeats this scenario. A home run in such a situation is called a walk-off home run, and any win in this situation is known as a walk-off win. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「extra innings」の詳細全文を読む スポンサード リンク
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