I think most starting QBs are playing hurt the second half of the season. He missed one game
He's had one winning season (9-8). They are 21-34 with him starting. 1 playoff game.
Considering the expectations for him coming out, that's a solid bust to this point. That turned out to be a terrible year for 1st round QBs (Lawrence, Wilson, Lance, Fields) but great for WR (Chase, Waddle, Smith).