I would drop the sinker for the time being; it doesn’t seem to be working as well as your other stuff. You do need a changeup; all your other stuff consists of power pitches, so the changeup needs to be quite a bit slower than your other pitches—by all means, work on that changeup and perfect it. If you’re having a problem with the circle change, you can try using the C-change, which is easier to throw and to control. I don’t know what your arm slot is, but if it’s working for you and if you can get those pitches in there for strikes, stay with it, and don’t let anyone try to change it. 8) 