As far as height I don't know how much taller he will get. He actually surprised me that he grew again in the past 2 months. I think he's always been average as far as growth goes firmly in 50th percentile. I would think if we are lucky he might hit 5'10". He's already taller then both of us.
But he has no facial hair yet. The men in our family are usually very lean in their youth, not super tall and athletic. Unfortunately not really the prototypical baseball physique.
I am curious why plyo balls are not recommended at his weight. Is it because the growth plates are still open? I know driveline has a youth program perhaps that might be better.
I love the meal prep idea on Sundays. Are you saying avoid the sugar component because it's just bad for you or is there an additional reason?
We just set him up with a baseball specific trainer just for weight lifting only. After winter sports end he will add a speed and agility component to his workouts.