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In baseball, a stolen base occurs when a runner advances to a base to which he is not entitled and the official scorer rules that the advance should be credited to the action of the runner. The umpires determine whether the runner is safe or out at the next base, but the official scorer rules on the question of credit or blame for the advance under Rule 10. A stolen base most often occurs when a baserunner successfully advances to the next base while the pitcher is pitching the ball to home plate. Successful base-stealing requires not only that the runner be fast but also have good baserunning instincts and timing. ==Background== Ned Cuthbert, playing for the Philadelphia Keystones in either 1863 or 1865, was the first player to steal a base in a baseball game, although the term stolen base was not used until 1870. For a time in the 19th century, stolen bases were credited when a baserunner reached an extra base on a base hit from another player.〔 For example, if a runner on first base reached third base on a single, it counted as a steal. In 1887, Hugh Nicol set a still-standing Major League record with 138 stolen bases,〔(【引用サイトリンク】title=Single-Season Leaders for Stolen Bases )〕 many of which would not have counted under modern rules.〔(【引用サイトリンク】title=JockBio: Bid McPhee )〕 Modern steal rules were fully implemented in 1898. Base stealing was popular in the game's early decades, with speedsters such as Ty Cobb and Clyde Milan stealing nearly 100 bases in a season. But the tactic fell into relative disuse after Babe Ruth introduced the era of the home run – in 1955, for example, no one in baseball stole more than 25 bases, and Dom DiMaggio won the AL stolen base title in 1950 with just 15. However, in the late 1950s and early 1960s, base-stealing was brought back to prominence primarily by Luis Aparicio and Maury Wills, who broke Cobb's modern single-season record by stealing 104 bases in 1962. Wills' record was broken in turn by Lou Brock in 1974, and Rickey Henderson in 1982. The stolen base remained a popular tactic through the 1980s, perhaps best exemplified by Vince Coleman and the St. Louis Cardinals, but began to decline again in the 1990s as the frequency of home runs reached record heights and the steal-friendly artificial turf ballparks began to disappear. Base stealing is an important characteristic of the "small ball" managing style (or "manufacturing runs"). Such managers emphasize "doing the little things" (including risky running plays like base-stealing) to advance runners and score runs, often relying on pitching and defense to keep games close. The Los Angeles Dodgers of the 1960s, led by pitcher Sandy Koufax and speedy shortstop Maury Wills, were a successful example of this style. The antithesis of this is reliance on power hitting, exemplified by the Baltimore Orioles of the 1970s, which aspired to score most of its runs via home runs. Often the "small ball" model is associated with the National League, while power hitting is associated with the American League. However, some successful recent American League teams, including the 2002 Anaheim Angels, the 2001 Seattle Mariners and the 2005 Chicago White Sox have excelled at "small ball." The Kansas City Royals have embodied this style recently, leading the league in stolen bases but finishing last in home runs in 2013 and 2014. Successful teams often combine both styles, with a speedy runner or two complementing hitters with power, such as the 2005 White Sox, who despite playing "small ball", still hit 200 home runs. 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「stolen base」の詳細全文を読む スポンサード リンク
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