The pitch a drop curve. If a pitcher throws a rollover drop, the drop curve can be thrown by being "looser" with the wrist. Most kids learning a roll over will first throw this pitch. Some pitchers (and pitching coaches) stop with the drop curve.
A drop curve alone is not good as "the" pitchers breaking pitch. Good hitters will take the pitch for a ball, and force the pitcher to throw a fastball in the strike zone.
A drop curve alone is not good as "the" pitchers breaking pitch. Good hitters will take the pitch for a ball, and force the pitcher to throw a fastball in the strike zone.