Wow, that’s the size post use after only one month. Did he not have a natural base?
For strength, he may have. It's as ThisisOverload said - Larry is a gorilla in the strength department, but not have genetics for size at all.
I'm intrigued at how some of us have no problem making progress on a strength program but struggle to gain mass, while some other of us will have no problem at all gaining muscle, yet not have the strength you might expect to go along with that muscle.
It would almost make you think that muscle and strength have no positive linear correlation, when very clearly they do.
Larry Wheels, for as freakishly strong as he is, is almost skinny with respect to that strength.