The Braves removed closer Billy Wagner from their divisional series roster before Game 3 against the Giants on Sunday afternoon.
Wagner, who plans to retire after the season, is suffering from a left oblique injury.
He was hurt in the 10th inning of Friday night's 5-4 win over the Giants.
Braves manager Bobby Cox said Wagner tried to throw "and he can't go at all."
Atlanta replaced Wagner with right-hander Takashi Saito.
Braves Replace Closer Wagner With Saito