http://mlb.mlb.com/news/article.jsp?ymd=20080601&content_id=2813827&vkey=news_mlb&fext=.jsp&c_id=mlb

Thirteen months removed from arthroscopic surgery on the same right shoulder, Prior opted to have the problem taken care of this week, even if it meant having season-ending surgery to repair the tear in the anterior part of the shoulder capsule.

"After speaking with the doctors, Mark wanted to definitively fix it and begin the rehab process," said Prior's agent, John Boggs. "I think that's the best way to go about it."