I love you man, but this is not correct.You can't simply rotate the ball in your hand and get different movement. There are subtle differences in the finger pressure applied to the ball to get movement.
Balls move based on the way the pitcher releases the ball (which is caused by the 'grip'). A pitching machine releases the ball the same way every time.When you use a machine, rather than a pitcher, there is no difference in the pitch movement based on 2-seam or 4 seam pitching.
Anyone can pick up a ball and switch between 2SFB and 4SFB grips and see the difference.
Based on my very limited experience, slight finger pressure changes do very little.subtle differences in the finger pressure
Last edited: