Oct 07, 2008 5:06 PM EST

Yankees' closer Mariano Rivera had successful surgery Tuesday on his right shoulder and is expected to resume throwing in three months.

The expected timetable will allow him to begin throwing a month before spring training starts.

Dr. David Altchek shaved a calcified joint on the top of Rivera's shoulder. The 38-year-old had 39 saves this year, and his 1.40 ERA was his best since 2005.

Via ESPN