A league source tells Profootballtalk.com that there is "much greater concern" about Robert Griffin III's reconstructed right knee than Griffin or "anyone connected to the Redskins" has let on. Griffin will end up rehabbing both knees because surgeons were forced to use a patellar tendon graft from his left knee in order to fix his right. He tore the ACL, LCL, and partially tore his meniscus in the right knee. Per PFT's source, the "biggest concern" is with Griffin's knee cartilage. Due to two knee constructions and ultimately three surgeries since 2009 at Baylor, there is concern "about how much (cartilage) remains and how long it will last" in Griffin's knee(s). A potential end result could be a bone-on-bone condition, which can lead to microfracture surgery and/or shorten a football player's career. Jan 12 - 2:30 PM Source: Profootballtalk on NBC Sports