Yasmani Grandal hit a two-run home run in the top of the eighth inning to extend Milwaukee's lead over the Cardinals to 5-2.
Reliever Tyler Webb started the inning by walking Trent Grisham, who has reached base three times in the game. Grandal followed with his 27th homer of the season.
Webb was replaced by John Brebbia after walking Mike Moustakas, and he escaped the inning with runners at first and second by recording the 14th strikeout by a Cardinals pitcher on the night.
Flaherty gets the start
