do (and works for you too) and is still having fun doing it. My son has always been pretty good in any sport he's tried since he was little.

I wouldn't cut other sports out at 9. I'd say maybe Middle school age maybe think about focusing on just 2 sports and then you'll have more time for camps/tournaments to get him basketball exposure. I'm on the non sports specialization side, keep doing at least 2 sports imo.

#1 thing at age 9 is having fun and learning good fundamentals.