He is 218. OU told him not to gain weight. They want him to show up around 220 and not any heavier. That is straight from the OU coaches after he committed.
He is going to play basketball and won't gain weight in there and that is what OU wants. That is why they like their guys to play multiple sports.
I am not guessing here, I am relaying you the info from Carson and the OU coaches.