Everyone has their own way of throwing a curve ball. The most common way is to throw this pitch is to place your index and middle finger on one of the seems on the ball. Place your thumb on the bottom seem. When you throw the pitch, rotate your hand and wrist clockwise for right-handers or counter-clockwise for left-handers. This allows the ball to come out between your thumb and index finger. The harder you flick your wrist, the more break the ball will have. This pitch takes lots of practice. Why This Works: The rotation of the ball ....