The Cardinals finally scored on Sunday, tying the game with the Brewers at 1-1 in the eighth.
Matt Carpenter led off with a double, moved to third on a ground out to second by Kolten Wong and scored on a sacrifice fly by Stephen Piscotty.
Luke Weaver came out after six innings, allowing three hits, one run, striking out eight and walking one.
BREWERS JUMP OUT TO 1-0 LEAD
Luke Weaver got in some early trouble as the Cardinals fell behind the Milwaukee Brewers for the fourth time in as many games in this series on Sunday at Busch Stadium.