Tyler Colvin's game-winning, pinch-hit single 4 comeback victory by the Cubs over the game set at Wrigley Field.

The hit made a winner out of Sean Marshall (6-5), who tossed a perfect top of the inning to lead the streaking Cubs to a 12-5 record in August.

Octavio Dotel (0-2) allowed the game-deciding run in the Cardinals' fourth loss in six games.

Randy Wells went seven innings for Chicago, allowing four runs on four hits and three walks while striking out five, and Jaime Garcia allowed three runs on nine hits and two walks in 6 1/3 innings in the start for St. Louis.