ST. LOUIS (AP) -St. Louis Cardinals right-hander Chris Carpenter underwent arthroscopic surgery to remove bone spurs in his elbow on Tuesday, a procedure the team described as an ``initial success.''
Carpenter, the NL Cy Young award winner in 2005 and a 15-game winner last year, could begin physical therapy later this week. Team physician Dr. George Paletta, who performed the surgery, said earlier that Carpenter would be sidelined at least three months.
Carpenter hasn't pitched since the season opener, when he allowed five runs in six innings in a loss to the New York Mets. He had been hopeful of returning to the rotation on Tuesday before experiencing a setback.
Brad Thompson filled his slot, allowing one run in five innings in his second major league start.

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