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it is the same issue that Doc describes. He trys too hard, and he knows when he starts trying too hard, so he trys hard to "take a little off" which is just a different way of trying too hard :) , does that make sense?
He tries to be perfect, and when he isn't perfect he tries even harder to be perfect, that doesn;t mean he is trys throwing the ball harder, it means he start to try and aim it, instead of just throw the ball with his normal mechanics like he knows how.
It sounds like Morrow needs something that Dr. D has talked about before, the "Emptying of the mind" mental state, where his practice and natural mechanics can just take over. Morrow's death nell is thinking too much.