This is also my thought. Its the first thing I thought of as well. Not him legit being hurt but needing to get another arm on the roster for a "Bullpen day". He didn't look very hurt last night. His feelings looked hurt but he didn't look hurt physically.
If him pitching injured because he always wants to take the ball every 5 days and this actually gets him healthy agian for next Season everyone here would be ecstatic. I just don't personally think thats the case.