7 of 23: In this May 18, 2004, file photo, Arizona Diamondbacks starter Randy Johnson waves to the crowd after pitching a perfect game against the Atlanta Braves in Atlanta. Arizona won 2-0. Johnson retired after 22 major league seasons. The Big Unit, an overpowering lefty who in June of 2009 became the 24th pitcher in big league history to win 300 games, made the expected announcement on a conference call on Tuesday, Jan. 5, 2010. (AP Photo/John Bazemore, File)

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