by Tim PovtakFiled under: Clippers, Summer League, Thunder, FanHouse ExclusiveORLANDO - He's only 23 years old, but Shaun Livingston already sounds like such an old soul. There is a good reason. He's been to basketball hell and back. Livingston is continuing his miraculous comeback here -- from that horrific knee injury he suffered in the 2006-07 season -- at the Orlando Pro Summer League, hoping to earn a roster spot next season with the Oklahoma City Thunder. He may never be the pla...