Royal Pain
Cheesehead
I'm not sure it's as important where the injury is as much Cobbs statement that he has to "trust" his knee/leg/whatever. This is more of a psycholigical hurdle than a physical one. I was concerned about the same thing when he suffered the injury. Cobb's not Cobb unless he's completely confident going over the middle in traffic. You can't be tentative and be effective at the position he plays.