Putting pressure on your both your index and middle fingers will cause the pitch to balance out, or become a cutter.
Avoid twisting your wrist. Twisting your wrist can cause injury over time.
Try not to drive your wrist forward with more than an adequate amount of force.
A left-handed pitcher’s slider should break down and away from left-handed hitters, and down and in on right-handed hitters. A right-handed pitcher’s slider should break down and away from right-handed hitters, and down and in on left-handed hitters.
