This is how you throw a curveball: first and second fingers on top of baseball on right seam. The trick to making a curveball spin and drop is the way you throw it. A curveball can be very dangerous to a persons wrist so do not throw a curveball unless you throw it correctly. A curveball is thrown with your wrist cocked to the side so your palm faces sideways.
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