In the actual showcase setting, he should also look to have at least one throw that's lower to the ground. Having said that, please, whatever he does, make sure he's not a slave to the numbers because that's how injuries happen or how players stop having fun with the game. My son is a 2021 and he saw a 7mph jump from last year to this year. He definitely put in the work in the weight room but a lot of it was just the natural process of growth, puberty, etc...