He's natty. There are plenty of dudes like that with ripped up tris. If he was juicing, with his genetics you would be able to tell. Not putting down Mes, he's got a physique that is built on weights, hard work and consistency, and genetics, and last but not least, not spending all his time on getbig trying to figure out who's juicing and who's not.
Now, Mysone, that dude I don't know, he's got the right physique, in fact Mes looks looks like a smaller version, and Mysone was about 200 pounds. Isn't he also known as Jucco?