Chicago White Sox pitcher Philip Humber retired all 27 Seattle Mariners batters he faced on Saturday to post the 21st perfect game in Major League Baseball history. Humber became the first major league pitcher to throw a perfect game -- a victory in which no opposing player reaches base -- since Philadelphia\'s Roy Halladay accomplished the feat against the Florida Marlins on May 29, 2010. The White Sox beat the Mariners 4-0. Humber\'s was the first perfect game or no-hitter in the Major Leagues this season. He became the third White Sox player to record a perfect game and the first pitcher to throw a perfect game against the Mariners. The last time Seattle failed to get a hit in a game was on May 14, 1996, against pitcher Dwight Gooden and the New York Yankees. Humber wrapped up the perfecto by striking out Seattle\'s Brendan Ryan on a 3-2 pitch in the bottom of the ninth. Paul Konerko\'s solo homer off Blake Beavan in the second inning had given Chicago a 1-0 lead. The White Sox added two more runs in the third and one in the ninth.