It's got to be mostly from his workout program at college because anyone who sees him throw will tell you his technique is awful, but at this point, there's not much reason to mess with it. Had a former coach from his travel days (former MLB pitcher) tell him he has an easy 2-3 more mph just by getting his legs involved. I am not kidding when I say his stride is less than 3 feet, even from the windup. It basically looks like he is standing in the yard playing pitch and catch with someone. I think it really deceives batters because it doesn't look like he's even trying lol