Thanks for the feedback. I welcome more from everyone.
He used to break his hands with his elbows, almost with a inverted or horizontal W. He has changed from that to what you see now. I think he kind of imitates Kershaw's leg lift and lowering his free foot before driving forward. I wonder if he is giving up velocity this way. It also looks like his low glove position blocks his leg lift from going higher, although I don't know how much that affects his pitches. He lands on the heel of his free foot instead of the ball of the foot. How much does that affect him?
Right now we are focusing on conditioning and mechanics before he gets back on the mound. His long toss was up to 120 feet, but not a lot of throws at that distance. The longest throws have just been part of outfield defensive work and those are relatively few in number. He was able to throw out some runners tagging up from 3rd from mid right field during his last practice. The rest of his long toss is probably around 100 feet. He continues to do shoulder band exercises every time he throws. He (and I) need to work on nutrition, but that is a difficult battle because he a picky eater.