In baseball, the most staid American game, revolutions don't come along often; roughly speaking, every 20 or 30 years.
Organized baseball's first revolution came in 1901, when the American League gave the National League its first serious competition for the hearts of the fans and the services of the best players.
Its second revolution came in the 1920s, when Babe Ruth showed everyone that baseball could be about power as much as finesse.
Its third revolution came in the late ...
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