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View Full Version : how much speed difference in change up

callyjr
06-29-2008, 11:50 PM
whats a common difference in speed for 9/10 level kids with a change or palm ball compared to their fastball?
CoachHenry
06-30-2008, 08:20 AM
Around 70% is what I've heard. I don't have any data to back that up.