The San Francisco Giants have placed Jake Peavy on the 15-day disabled list with a lower back strain.

The move announced Saturday is retroactive to Aug. 21. San Francisco recalled right-hander Albert Suarez from Triple-A Sacramento to start Saturday night's game against the Atlanta Braves in Peavy's place.

Peavy was supposed to start for the first time since a demotion to the bullpen on Aug. 1. 

Bruce Bochy said Peavy "can't pitch the way his back is right now" and that it's "a bad break for him."