Little bit of overstride, which results in a follow through that looks a lot like a pitcher coming off the mound with all his weight going towards home plate. Overstriding is more of a symptom, and an end result than a cause. Footwork is what starts the chain reaction. He doesn't always get his lead toe pointed at the target. A lot of times his lead foot is planted perpendicular to the target, which causes the over rotation of the shoulders because his left hip can't clear, causing him to have to lift his back leg so high, which causes a loss of neutral spine angle...which causes an off balance follow through. When he gets his lead toe pointed at the target, he typically makes a much more accurate throw and has better balance. Footwork dominates everything you do in any position in any sport. His needs work.