Hamels (8-6) was pulled after six innings and seemed fine with the decision. He struck out seven, walked five, hit a batter and threw 108 pitches on a hot afternoon at Turner Field.
Relievers Jake Diekman, Ken Giles and closer Jonathan Papelbon each pitched a hitless inning to finish off the fourth no-hitter in the majors this season.
Clayton Kershaw and Josh Beckett of the Dodgers and Tim Lincecum of the Giants each threw no-hitter earlier this year.
