Cameron Maybin hit a two-run homer, Will Venable had three RBIs and the San Diego Padres handed the struggling St. Louis Cardinals an 11-3 loss on Monday night.

The loss dropped the Cardinals 9 1-2 games behind first-place Cincinnati in the NL Central. The Reds beat Pittsburgh 4-3 in 14 innings. St. Louis, which has lost four of five, had its lead cut to one game over the idle Los Angeles Dodgers for the second NL wild-card berth.

Maybin connected for his seventh homer off Jaime Garcia (4-7) that broke a 2-all tie in the fourth inning. Maybin had three hits and scored three runs.

Chris Denorfia tied his career high with four hits and also had two RBIs. Logan Forsythe added three hits to tie his career high as San Diego matched its season best for runs and had 17 hits.

The loss started a crucial seven-game West Coast trip for the Cardinals, who begin a four-game set on Thursday night against the Dodgers.

Eric Stults (6-2) allowed three runs on five hits with five strikeouts and a walk in 5 1-3 innings. Stults is 5-0 in seven starts since rejoining the starting rotation on August 6.

Garcia got pulled after only three innings, giving up four runs on seven hits. The lefty struck out four, walked three and had two wild pitches.

San Diego has won 14 of 18 overall and 18 of 24 at home.

The Cardinals had cut the lead to 6-3 when they loaded the bases with one out in the seventh inning. But Dale Thayer, who came in and gave up a single to Carlos Beltran to load the bases, got Matt Holliday to ground into a double play.

Rookie Pete Kozma put the Cardinals ahead on a two-run triple with two outs in the second. Kozma finished with three hits.

NOTES: Garcia is 1-5 with an 8.32 ERA in his last six road starts. ... Cardinals RHP Lance Lynn will start Thursday night against the Los Angeles Dodgers. Lynn replaced RHP Jake Westbrook, who sustained a right oblique injury on Saturday. St. Louis manager Mike Matheny said the injury is not severe and said it looks as if Westbrook will pitch again this season. ... Padres closer Huston Street, on the DL since Aug. 11 (strained left calf) threw a simulated game. Manager Bud Black said the club will make a decision later in the week when Street will return. ... St. Louis 1B-OF Lance Berkman will have season-ending surgery on Tuesday on his ailing right knee. Berkman has just two homers and seven RBIs in 80 at-bats. .. Cardinals RHP Chris Carpenter threw around 70 pitches in a simulated game on Monday, keeping alive the hope he might pitch this season. Carpenter, 37, has not pitched because of a nerve condition in his right shoulder. ... St. Louis RHP Adam Wainwright (13-12, 4.04 ERA) faces San Diego RHP Edinson Volquez (9-10, 4.27) on Tuesday night.