Grip the baseball with your index finger along one seam, and your middle finger along the other. Now, shift your index finger so that it's right alongside your middle finger. Cock your wrist back towards your body. When throwing the ball, the key is to keep your hand behind the ball for as long as possible. Snap down with the wrist (not the elbow) as late as possible in the delivery. The other important thing to remember is that you're not throwing it at the catcher's mitt. You should feel like you're pulling down on the ball, almost throwing it into the ground. The result should be a nice looping pitch that "drops off the table".