Regarding Mike O'Hearn... natural v. juiced. I've known Mike casually since 1993, and if if Mike is lifetime natural, there is absolutely no doubt in my mind, that if he had hit the gear hard, he would have been a mutiple WSM winner and one of the strongest men that ever lived.
Either way, dude looks great for 40 yrs old... or for that matter 20 yrs old.