Apr 17, 2009 2:05 PM EST

St. Louis pitcher Chris Carpenter is expected to miss 4-8 weeks of action with a torn left oblique muscle.

"It just confirmed our initial read," general manager John Mozeliak told the St. Louis Post-Dispatch. "You certainly would have preferred it find nothing. But given his level of pain [Tuesday], this is what was expected."

Carpenter has pitched ten scoreless innings this season.

Via ESPN