Matt Carpenter and Jedd Gyorko hit solo homers for St. Louis, which has won three of last four. Ten of the Cardinals’ 21 homers this season were hit in the three-game series against the Reds, who have lost five of six.

Kevin Siegrist (2-0) entered with a runner at second and two outs in the seventh, struck out Zack Cozart and pitched a 1-2-3 eighth, fanning two more. Trevor Rosenthal struck out his last two batters in a perfect ninth for his third save in as many chances.