The Associated Press

HOUSTON — Cincinnati third baseman Scott Rolen had surgery on his left shoulder and is expected to miss four to six weeks.

Rolen, who has been on the disabled list since July 22, had arthroscopic surgery to remove bone spurs and fragments from a joint in his shoulder on Wednesday by Reds medical director Dr. Timothy Kremchek.

He was also out from April 24 to May 12 with an injury to the same shoulder. Rolen has had issues with his shoulder since 2005 when he was injured in a collision with the Dodgers’ Hee Seop Choi and had two operations.

Rolen missed the last month of the season in 2007 when he had his shoulder cleaned out and was on the DL in 2008 with a shoulder sprain.