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. Walker played college basketball at Kansas State.

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 off-season
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.