ST. LOUIS -- Matt Garza was in control and Milwaukee was on track to win a big National League Central showdown series Sunday in Busch Stadium.

But a recurring oblique injury ended Garza's day after six innings and 71 pitches of one-hit, shutout baseball. The Brewers bullpen hacked up a 2-0 lead in mere minutes and St. Louis came away with a 3-2 win to cut Milwaukee's division lead down to a game.

Garza actually walked up the dugout steps to hit for himself with two outs in the seventh, but manager Ron Roenicke pulled him back. TV cameras caught Garza expressing displeasure, but it was more at the situation and not at his manager's decision.

"It felt like a muscle grab and it was one of those," Garza said. "There's too much time left in the season and I thought I'd make the smart play. I could have made it worse and been out the rest of the year."

The team plans to examine Garza Monday during an off-day, hoping for the best. With five other players either disabled or battling nagging injuries, the Brewers don't need any more bad news.

"Hopefully, it's just a precautionary thing and we'll find out after a couple of days," first baseman Mark Reynolds said of Garza's injury. "If he had hurt it any worse, he would have been in really bad shape."