Celtics' Perkins undergoes shoulder surgery

BOSTON -- Boston Celtics starting center Kendrick Perkins has undergone surgery on his left shoulder.

The Celtics said Perkins had arthroscopic surgery Wednesday at New England Baptist Hospital. Also undergoing surgery was the Celtics' second-round draft pick, Bill Walker, to repair damage to his right knee.

The NBA champions said both procedures were successful. Team physician Dr. Brian McKeon led both surgeries.

No timetable has been set for Perkins' and Walker's offseason returns to the Celtics.

Perkins was nagged by the shoulder late in the season and aggravated the injury in the Finals against the Los Angeles Lakers, causing him to miss Game 5 of the series.