While we're on the subject, I would like to try to understand how brush interference is a key to increasing velo and if that's true why MLB pitchers are able to throw 100 mph with no brush interference.Wondering why you say arm speed maxes out at 14u and the rest from drive mechanics? Doesn't Rick Pauly say only 3-4 mph come from drive? (Or another way 95% from arm and brush combo)
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