New Jersey Nets center Brook Lopez underwent surgery on his right arm at the Hospital for Special Surgery in Manhattan on Wednesday. Nets team orthopedic Dr. Riley Williams III and Dr. Andrew Weiland removed a bone mass and calcium deposits from Lopez's right upper arm, Nets general manager Billy King announced. "Brook was bothered this year by a bony lump that developed after he was hit in the arm early this year," Dr. Williams said in a statement released by the team. "The mass was successfully removed today. A full recovery is expected, and Brook should be able to return to basketball activities in approximately six weeks."