Andy Pettitte returned to the mound for the Yankees on Sunday afternoon against the Mariners. The left-hander pitched into the seventh inning and allowed a pair of two-run home runs in New York's 6-2 loss. "I just cannot believe how comfortable this is for me," Pettitte said. "I don't know how to explain it." It marked Pettitte's first Major League start since he retired after the 2010 season.