Chris Carpenter to undergo season-ending surgery for Cardinals

Chris Carpenter, who hasn't pitched since Game 7 of the 2011 World Series, will undergo season-ending shoulder surgery. (Dilip Vishwanat/Getty Images)

Chris Carpenter will undergo season-ending shoulder surgery, according to a tweet from Jenifer Langosch of MLB.com.

The news comes as a stark contrast from the outlook reported last week by the Cardinals, who said he would forgo season-ending surgery in order to pitch again this season, according to Matthew Poullot of NBCSports.com.

Joe Strauss of the St. Louis Post-Dispatch reported that the Cardinals cancelled his bullpen session on July 2 and no timetable was given for his return to the team:

Carpenter, 37, acknowledged last Friday that he would continue to throw until it became clear there was no hope of soon returning to the Cardinals' rotation. Carpenter said if he reached such a point he would consider other options. Surgery was among them.

According to Strauss, rehab from the surgery is expected to take six months.

Last September, Carpenter signed a $21 million, two-year extension with the Cardinals but hasn't played in a game since his win over the Rangers in Game 7 of the 2011 World Series.