Jon Jay and Skip Schumaker each had three RBI as the St. Louis Cardinals pounded the Milwaukee Brewers, 13-1, in the opener of a three-game set at Busch Stadium.

Matt Holliday and Matt Carpenter knocked in two runs apiece as the Cardinals earned their second straight win.

Jake Westbrook (3-1) allowed one run on seven hits with no walks and five strikeouts over seven innings to earn the victory.

Yovani Gallardo (1-2) was touched for eight runs on eight hits and two walks through just two-plus innings for Milwaukee, which lost for the fifth time in eight games.

Milwaukee opened the scoring in the top of the first inning with three straight one-out singles by Nyjer Morgan, Ryan Braun and Aramis Ramirez to bring home Morgan and place runners at the corners.

Corey Hart, though, followed by grounding into an inning-ending double play to keep it a one-run game.

David Freese and Yadier Molina then started the second with back-to-back singles and after Freese was retired at third on a fielder’s choice off the bat of Carpenter, Schumaker’s triple to left-center field plated Molina and Carpenter.

But Schumaker would be stranded at third as Westbrook hit a grounder back to the mound and Rafael Furcal went down swinging.

The Cardinals then blew the game open with an eight-run third inning.

After Jay led off with a base hit to left and Holliday worked a walk, Carlos Beltran and Freese followed with consecutive RBI singles. Molina was then given a free pass to load the bases before Carpenter brought home Beltran and Freese with a double to knock Gallardo out of the game.

But reliever Mike McClendon didn’t fare much better, allowing a run-scoring single to Schumaker and then walking Furcal after Westbrook’s sacrifice bunt to fill the bags again. Jay followed with a two-run single and Holliday added a base hit to center to score Furcal.

Beltran’s inning-ending double play on a liner to second where Jay was doubled off at second mercifully ended the inning as St. Louis took a 10-1 lead.

Jay and Holliday slapped back-to-back RBI singles off McClendon in the fifth inning and Molina hit an RBI double in the eighth to complete the rout.

After the first inning, the Brewers didn’t place a runner on second base until the fifth when Alex Gonzalez was hit by a pitch before Jonathan Lucroy singled to left. But McClendon struck out on a missed bunt and Rickie Weeks went down swinging to end the threat.

Ramirez’s two-out double in the sixth was the only other time Milwaukee put a runner in scoring position.