How to throw a breaking ball. There are a number of pitches that would fall under the category of breaking ball, including curve ball, slider, knuckle curve, and others.
When throwing a breaking ball, it's very important that you maintain the same arm slot and arm speed as if you were throwing a fast ball. Otherwise, the batter will be tipped off and gain an advantage. It's also important that the batter does not see your grip on the baseball. Typically when throwing a breaking ball, the pointer and middle finger will be pinched together along a seam of the baseball. If the batter can detect this, it's easy for him to know to wait back and hit this breaking pitch.
Some other problems that pitchers have when throwing breaking balls is they will wrap their wrist while throwing the pitch, or they will twist their wrist upon release. These are techniques that are not effective and may cause injury. So when throwing a breaking ball, make sure that we simply grip the ball effectively, go through our normal arm speed and delivery, and finish properly over that front right side knee.
If you do these things, you will throw an effective breaking ball.