The strength of the Dodgers' middle relief grew more questionable Tuesday when the team announced that right-hander Cory Wade would undergo exploratory surgery on his throwing shoulder Wednesday in Los Angeles.

Dogged with shoulder problems since his strong rookie year in 2008, Wade will have an arthroscopic procedure performed by team physician Dr. Neal ElAttrache aimed at finding the source of his discomfort.

The surgery probably will sideline Wade, 26, for at least two months. The Dodgers, who had a day off Tuesday, said more information about Wade's prospects would be disclosed after the surgery.