Here was the Wikipedia entry ... hahaha hilarious!:
On June 2, 2010 Galarraga pitched a perfect game for the Detroit Tigers, defeating the Cleveland Indians 3-0. It was the 21st Perfect game thrown in Major League Baseball history and the third perfect game to be thrown in the 2010 Major League Baseball season; the most perfect games thrown in one season in Major League Baseball history. Galarraga is the first Detroit Tiger to throw a perfect game.