This is how you throw a palmball: you grip a palmball much like a change up but choke the ball much deeper in your hand.
Type of Pitches
Fastballs: Four-seam Fastball, Two-seam Fastball, Splitter, Cutter, Sinker, Forkball
Off speed: Changeup, Palmball, Screwball,Knuckleball
Breaking Pitches: Curveball, Slurve, Slider