So , they need a grip that gets the standard 10 - 12 mph off of the pitch .
But , because most amateurs struggle to make the ball move , a flat , hard changeup wo n't work -- it becomes a BP fastball .
So , amateurs need a grip that gets the standard 10 - 12 mph off of the pitch .
But , because most amateurs struggle to make the ball move , a flat , hard changeup wo n't work -- it becomes a BP fastball .