FILE - In this April 21, 2012, file photo, Chicago White Sox starting pitcher Philip Humber, center, is mobbed by teammates after pitching a perfect baseball game in their 4-0 win over the Seattle Mariners in Seattle. Seattle pitcher Felix Hernandez threw a perfect game, the Mariners' first ever and the 23rd in baseball history, against the Tampa Bay Rays in a 1-0 victory on Wednesday, Aug. 15. It was the third perfect game in baseball this season _ a first _ joining gems by Chicago's Humber against the Mariners in April and San Francisco Giants' Matt Cain versus the Houston Astros in June. (AP Photo/Elaine Thompson, File)

FILE - In this April 21, 2012, file photo, Chicago White Sox starting pitcher Phil Humber briefly stops in view of the scoreboard an hour after delivering a perfect baseball game and a 4-0 win against the Seattle Mariners in Seattle. Seattle pitcher Felix Hernandez threw a perfect game, the Mariners' first ever and the 23rd in baseball history, against the Tampa Bay Rays in a 1-0 victory on Wednesday, Aug. 15. It was the third perfect game in baseball this season _ a first _ joining gems by Chicago's Humber against the Mariners in April and San Francisco Giants' Matt Cain versus the Houston Astros in June. (AP Photo/Elaine Thompson, File)

In this April 21, 2012, photo, Chicago White Sox starting pitcher Phil Humber throws in the third inning while pitching a perfect baseball game against the Seattle Mariners in Seattle. The Houston Astros have claimed Humber off waivers from the White Sox and agreed to a one-year contract with him. (AP Photo/Elaine Thompson)

Seattle Mariners' Michael Saunders swings and misses at a pitch from Chicago White Sox Phil Humber in the ninth inning of a baseball game on Saturday, April 21, 2012, in Seattle. Saunders struck out on the turn. Humber pitched a perfect game and the White Sox won 4-0. (AP Photo/Elaine Thompson)