Sixers guard Jason Richardson will have surgery to repair torn cartilage in his left knee and will not play again this season, a league source confirmed. However, the Sixers announced that Richardson will seek a fourth opinion on his ailing knee as early as Thursday. The Sixers say there has been no decision on whether Richardson will have surgery. Yahoo! Sports first reported the news of Richardson's surgery. “He’s going to be out for a while,” Sixers head coach Doug Collins said after Wednesday’s loss to the Pacers. Richardson, the 12-year veteran, was in New York City on Wednesday where he received a third opinion on his ailing left knee from specialist Dr. Jonathan Grashow. Late last week, Richardson went to Vail, Colo. for a second opinion from renowned orthopedist, Dr. Richard Steadman. Acquired in the four-team blockbuster trade in which Andrew Bynum came to the Sixers and sent Andre Iguodala to Denver and Nik Vucevic and Maurice Harkless to Orlando, Richardson had battled several injuries this season. He twice sprained his ankle and missed the last eight games because of his left knee. In 33 games this season, Richardson averaged 10.5 points per game with 3.8 rebounds. He also shot a career-worst 40.2 percent from the floor and just 34.1 percent from three-point range. Richardson has two years and $12.8 million remaining on his contract.