change up

Im having some trouble with my change up whenever i throw it its always high and always a ball. I grip it with 3 fingers is there any other way to grip it?

13 years old

2seam-80-85
4seam
knuckleball
(changeup)

You can do the “Vulcan Changeup” - I think this is like a split finger fb or you could try the circle change. I think there are pictures of the grips on this site.

If you are leaving the pitch up - it may be release point problem or it could be that you are unconsciously trying to throw the pitch softer as opposed to using the same fastball mechanics and letting the grip/hand action cause the change in velocity. I have this problem and have read that you should really concentrate on the last 10% of your delivery and hand action. I haven’t tried this during one of my pen’s yet but I am planning to do so.