Does anyone know how to?
slam the hand on the table
Use fastball arm speed.
Well, this is hard over the internet but here goes.
- make sure the ball is spinning correctly in the first place
- Buy a squeeze toy and massage it all the time-finger strength is a big help in throwing breaking pitches.
hard stuff: (hard to visualize)
When you throw your fastball-you think about accelerating your arm from back to front in a straight line or a very very low arc.
When you throw a curve ball, you want the same arm speed-same force- but instead of a straight line or low arch-you want more arch to your motion-not a rainbow (this would be a change up off your curve) but a good low hump. This means most of your acceleration is downward (the karate chop discription) and frankly after you have released the ball.
I hope this makes some sense, Ian.