JUPITER, Fla. -- Adam Wainwright underwent ligament replacement surgery on his right elbow Monday morning in St. Louis.

The procedure went "very well," according to a team spokesman.

The Cardinals intentionally did not use the word "successful" to describe the procedure because success will be determined by his ability to return within 12-15 months.

Last year's 20-game winner and NL Cy Young Award runner-up is expected to return to camp in about two weeks, the club said.

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