A right-handed pitcher snaps his wrists in clockwise rotation when delivering a curveball (he grips the ball with his middle finger near the top of the ball and his thumb on the bottom---but releases the pitch with his thumb near the top). A pitcher throws a slider with smaller wrist-break. He imparts spin by gripping the ball "off-center" (that is, he grips the ball with his middle finger at "2 o'clock"-- instead of 12 o'clock)
Simply place your fingers the same way you would a curve using your index and middle fingers putting them close together. Thumb and middle finger split the baseball in half as you should do with most pitches.. Keep your ring finger and your pinkie off to the side as they shouldn’t make any real contact with the ball. Place a little more pressure with your thumb and middle finger as your index finger puts little to no pressure on the baseball.
The difficulty with this pitch isn't from the pitch itself. In fact, most pitchers feel this grip gives them the most rotation – and most movement – of any breaking pitch. However, many pitchers who are learning this pitch for the first time, aren't comfortable with the "tucking" part. It's not super comfortable at first to tuck your index finger into the baseball.
You’ll see drills out there that have kids bring the ball up by getting their throwing arm into a good “L” position and their glove arm pointing at the target. This is where the coach can stop the pitcher to make sure his arms are in the right position and make adjustments if needed. There are so many flaws with this method of teaching I don’t even know where to begin…
Pitchers and catchers stand at regulation distance from each other. The catcher stands behind home plate, and a batter stands in the batter's box. The batter should alternate between a left-and right-handed batting stance after five pitches, but not take any swings. The catcher calls balls and strikes. Have the batter wear a helmet in this practice session.
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