With his strength yes he could definitely transition to BJJ with the right teacher he would be more than fine.
I’ve been a practitioner for 6 years, I’ve seen kids who were way smaller, way weaker with no background in wrestling at all become skilled grapplers with a year or 2 of proper teaching. All he would need to learn is how to pass guard from different positions in mount & he’d be good to go, although he’d probably get leg locked quite a bit until he learned how to defend against it.
And of course he would get washed by most Midwest & Northeast wrestlers, that’s literally their culture, those kids from those regions live & breath wrestling like kids in the Southeast live & breathe Football.
I wasn’t saying he can be an Olympic wrestler or even college level, my exact comment was he has a future as grappler if Football don’t work out, which is true, take him to a legit BJJ teacher & they would be more than happy to work with a kid that has his natural strength.