Pitching Grips: Curveball
There are a couple of different ways to grip the curve ball. Grip the ball along the seam of the "horseshoe". Put most of the pressure on the middle finger. The wrist is snapped down and when the ball is released, it comes over the index finger.
When thrown properly, the ball breaks down (and away) from a right-handed batter when thrown by a right-handed pitcher.