This is how you throw a sinker: grip like a curveball but on opposite seam. You turn your wrist to the left so your wrist is facing to the right. The sinker should spin backwards and will drop late and quickly.
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