What FiveFrame says is what I typically see from students coming to me with a roll over drop. The ball peels off the finger tips and the rolling action happens about "a day after release". So if the ball does peel like is being suggested here then the gripping across the four seams may give slightly more movement.
To verify this, simply wrap some red electrical tape around the ball and perpendicular to the four seams. Then throw some pitches using each grip (four seam/two seam). I am guessing the four seam grip will have the tape right down the middle of the ball.
To verify this, simply wrap some red electrical tape around the ball and perpendicular to the four seams. Then throw some pitches using each grip (four seam/two seam). I am guessing the four seam grip will have the tape right down the middle of the ball.
