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CHICAGO - JULY 23: Mark Buehrle #56 of the Chicago White Sox pitches in the top of the ninth inning against the Tampa Bay Rays on July 23, 2009 at U.S. Cellular Field in Chicago, Illinois. Buehrle pitched the 18th perfect game in major league baseball history as the White Sox defeated the Rays 5-0. (Photo by Ron Vesely/MLB Photos via Getty Images)

CHICAGO - JULY 23:  Mark Buehrle #56 of the Chicago White Sox pitches in the top of the ninth inning against the Tampa Bay Rays on July 23, 2009 at U.S. Cellular Field in Chicago, Illinois.  Buehrle pitched the 18th perfect game in major league baseball history as the White Sox defeated the Rays 5-0.  (Photo by Ron Vesely/MLB Photos via Getty Images)