You've got me thinking back to my basketball around the same age. I was tall early. Which made up for me not being a great ball handler. Even in 9th grade on the freshman team I was a scorer. Then came tryouts the next year for JV and Varsity and I was no longer tall. They wanted to outright cut me. I was devastated. I begged just let me practice with the team, I don't care if I never play. I rode the pine for two years. It was good for me. I got to stay in shape, which I saw in another article is important to your son. And maybe his growth spurt is ahead of him.