This combination of 2012 file photos shows, from left, San Francisco Giants pitcher Matt Cain on June 13, Chicago White Sox pitcher Philip Humber on April 21, and Seattle Mariners pitcher Felix Hernandez on Wednesday, Aug. 15. Seattle's 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. It was the third perfect game in baseball this season - a first. (AP Photos/File)