I wonder if he wouldn't stutter less if he got into a position at the top that supported what he tries to do in the downswing. I sense conflicting alignments. I bet he has a hitter inside bursting to get out.
PS: A famous former Swedish ski jumper - Jan Bokloew - was stuttering. During one interview on TV the stuttering was brought up and he told the program host that he never stuttered when he sang. So they did the rest of the interview singing. It was amazing and also a heart warm interview.
This is a well known phenomenon to musicians....there is a slight difference between the parts of the brain and neural pathways used during singing vs. normal speaking. There are many great singers in the world who have or currently do struggle with speech.
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What the HECK am I supposed to do with all of my "IN TRESSEL WE TRUST" T-shirts?