Points to work on
Goes back before he goes forward. His front side (direction) is far to forward as the start of his wind up.
He starts his motion like he is doing the “Rocker Drill” - far to open in my opinion.
No hip shift forward to the plate (no drive off the back side)
Front hand far behind his front foot during separation. Teach him to “conduct an orchestra” on separation to get his hands moving properly.
Front side glove/hand stay REALLY low. Never does the front elbow remotely get to a position in which it is pointing at the target (catcher)
NO STRIDE — He has none. Leaves him way to “narrow” even for a pendulum pitching motion.
He does not pull himself to his glove or pull his glove towards his chest - it stays at his belt the entire time.
He never really pulls his body down on finish.
He is always going to “fly open” because nothing in his front side is direction is going towards the plate.
From the base up he needs to be rebuilt. Pitching is all about the legs and core. The arm should just follow where those are taking it.