He's not as bad as his #'s suggest. In-game fatigue is something you have to adjust for, but looking at his game logs, you've only clearly abused him a couple of times. Some of it is just randomness. How big is your staff? He may do better pitching slightly less often. Either way, from here, throw out his numbers and gage his stats from this point forward. His season numbers are already screwed, but if he's effective at all the rest of the way, those numbers will mask it if you're not looking at the context.