At this point, I think pretty much everyone is playing hurt. If he is injured enough to explain his play as of late - he shouldn't be on the ice. His assist in OT notwithstanding - he is killing them at times.
I don't think its an injury, mainly because most of his most glaring mistakes have been mental. I stopped counting when I got to double digits the times when he just passed the puck either to nowhere or right onto a Red Wings stick. Not that the puck got away from him - they were just stupid passes.