Our son has been using the "fosh" changeup very successfully for several years. It's a type of splitter, with fingers split outside the two seams, but with the middle, ring, and pinky fingers all touching, and the thumb along the side of the ball. Can throw for a strike or swing and miss (he's a RHP, great pitch against lefties). Gets very good run and drop. Low spin, it just "dies." Get's a lot of weak contact with it plus swings & misses.