Philadelphia 76ers guard Jason Richardson, sidelined for the remainder for the NBA season, underwent successful left knee surgery on Tuesday, the team announced.
Richardson, a 12-year NBA veteran who has not played since having the knee drained of fluid on January 18, had an articular cartilage lesion on the medial condyle of his femur bone repaired at New York's Mt. Sinai Medical Center.
Recovery time was expected to be from six to nine months, meaning Richardson might not return until the 2013-14 NBA campaign has already started.
Richardson, 32, was obtained by Philadelphia from Orlando as part of a four-team trade last August that sent All-Star center Dwight Howard from the Magic to the Los Angeles Lakers.
In 33 games this season, Richardson had averaged 10.5 points and 3.8 rebounds for the 76ers, who at 22-29 are ninth in the Eastern Conference, four games behind Milwaukee for the last playoff spot in the East.