McCoy helped Orton achieve the best seasons of his career, got Rivers out of a funk and helped Peyton regain his efficiency after four neck surgeries. The success is measurable.
McCoy is a Peter Principle guy. Needs to remain an OC and not become a HC.
I'm not too sure about the way you're seeing things. With Orton for example, his "best" year, at least in terms of passer rating, was with Dallas. But I can see why his time in Chicago might be considered his best but I think we need to take a step back and see that for what it really was. Orton at his best was still just an 87-ish rating QB. That isn't anything for an OC to hang his hat on. If you look at Orton's career, that seemed to be what he was. Not so much that he was being elevated while under McCoy's scheme/tutelage.
With Rivers and Manning, I find it very difficult to give McCoy credit for either or both of them. With Manning, I'm not sure how McCoy gets any credit for healing his neck. That doesn't make any sense at all to me. And if you look at the numbers, Peyton's first year in Denver was a tad better than his last year in Indy. But, any credit that one might consider for McCoy because of that sort of flies out the window when you look at what Manning did his second year in Denver when McCoy was gone. If anything, Manning discredits McCoy more than supports him.
Kind of the same story with Rivers. You really can't say for sure that it was McCoy who made the difference. It isn't like Rivers had never put up numbers before McCoy and it's hard for me to give McCoy the credit when Whisenhunt and Reich were the OC's.
I'm not saying it isn't possible that McCoy is a good OC but I have to disagree with the statement that his success is measurable or definitive. Personally, I think he's JAG as an OC.
