Philadelphia 76ers guard Jason Richardson learned Wednesday he will miss the rest of the season due to a left knee injury that requires surgery, a source told Yahoo! Sports.

The 12th-year veteran was told by a doctor in New York City that he has a cartilage tear the size of a quarter on the right side of his left kneecap. Richardson is expected to be out six to nine months following surgery that is expected to take place next week.

via Marc J. Spears of Yahoo! Sports