As I said in the OTHER THREAD, it was All About Sammy, All The Time. He only cared about how he looked. He didn't want Rex to force him to play through his injury last year, because it would make him look bad. When he did play, even though he was limping, he wanted to be targeted a lot, because otherwise he'd look bad. Even when they won a game, if he wasn't targeted enough (because he was limping, or because of the gamplan), he'd make noise in the locker room.
Sounds like a real POS to me.