The in-curve is pitched with a side-arm motion, the ball being released over the tips of the first two fingers, the arm being swept around with a lateral motion. Some pitchers throw an in-curve by grasping the ball with all four fingers and permitting it to slip over the tips.
McGINNITY THROWING AN INSHOOT, THE BALL ROLLING OFF HIS FIRST TWO FINGERS.
HOW McGINNITY TURNS HIS HAND TO PITCH A DROP BALL.
