I disagree. Horses want to run. He's not, to the best of our knowledge, dealing with an acute injury. He's trying to make his body work around the remnants of and old one, and a lot of that is mental.
When he gets positive feedback from his contributions (in the form of objective success) it's important to let him follow that positive feedback train.
It's not about over playing him, but playing him as a backup right now would be asinine and I can guarantee you they won't do it unless he has two or three stinkers in a row.