The game got off to a scrappy start. Cubs starter Ted Lilly was ejected in the first inning after hitting Edgar Renteria with a pitch, causing the benches and bullpens to empty.
Renteria left for a pinch-hitter in the fourth because of a bruise on his left hand, the result of Lilly's fastball. The Braves said X-rays were negative.
The Braves scored three runs in the eighth off Dempster, who had pitched nine straight scoreless innings.
Michael Barrett and Mike Fontenot (FAHN'-teh-noh) homered for the Cubs.