The Milwaukee Brewers chase for another division title just got a little tougher today. Left-handed starting pitcher Chris Narveson confirmed to reporters (via Tom Haudricourt of the Journal-Sentinel) he will be undergoing shoulder surgery to repair the torn rotator cuff in his pitching shoulder, thus ending his 2012 season abruptly after just two starts. Haudricourt writes Narveson will be out for 6-9 months after going under the knife.

While Narveson isn't exactly a front line starter by any means, it's always tough to replace 160-170 innings which is what the southpaw gave them the past two years. For now, the Brewers will turn to right-hander Marco Estrada, who spot-started for Narveson the last go around the rotation.

Narveson, 30, posted a 4.45 ERA last season across 161 2/3 innings of work along with a 7.0 K/9 and 3.6 BB/9. He made two starts this season and allowed 7 runs to score on 9 innings of work.