Charlotte Bobcats forward Sean May had arthroscopic surgery on his right knee Thursday, likely bringing his rookie season to an end.

May, the 13th overall pick in the NBA draft, had missed the past 13 games because of soreness in his knee. He had surgery on the knee on Sept. 13 in California, then Charlotte officials scheduled Thursday's procedure to explore why it was still bothering him.

Bobcats physician Dr. Glenn Perry trimmed torn cartilage during the procedure.

There was no timetable for May's return, but he's expected to need at least eight weeks to recover -- and probably won't be pushed to return to the court.

"We want Sean to get healthy and get everything taken care of," Bobcats coach Bernie Bickerstaff said. "We want him to take his time. There will be no rush for him to come back -- he is too important to our franchise."