He is from the Amateur Mr. O ~
I have a friend who competes on the National level and has a physique very similar to this. When he does the double-bi like this his whole upper body looks like an angry Cobra. Perfect genetics pretty much everywhere. No lagging bodyparts. Yeah, he is a lightweight dude, but that body is nothing to put down. The separation and detail on the legs are impeccable. Everything just smoothly falls into place. Shmoe thong worship comments coming, I know. I don't mind. It wouldn't be GB without them