Kellen Winslow says knee all that’s keeping him from league’s elite

Seattle tight end Kellen Winslow has never lacked for confidence. But the former “soldier” sounds like he at least understands his limitations, even if he does still have a grand idea of himself. “If I was healthy, which I never will be again, I would be Aaron Hernandez and (Jason) Witten together,” Winslow told Clare…