Mark Buehrle
In Humber's 30th career start in MLB, he pitched the 21st perfect game in MLB history against the Seattle Mariners on April 21, 2012. It was the third perfect game in White Sox history after those thrown by Charlie Robertson and Mark Buehrle, and the 18th no-hitter in White Sox history. It was Humber's second start of the 2012 season and first career complete game.