I think genetics has more to do with success in bodybuilding than anything else, but i still dont think Ohearn is natural, do i think he's a genetic freak who looks like he does on very low doses of test and GH, yes i do, guys with good genetics guys can look like that with 2iu per day and 100-200mg test per week. He might have used a bit more years ago to gain his size years ago, but he's been at it a long time is very consistent, so he might not have had too either. Don't underestimate what a guy with genetics can do with low consistent doses.
There is no doubt he could have been a top bodybuilder if he pushed the envelope and i don't even like the guy, but he was well established mid 90s in Venice when I was there and he looks pretty much the same now, well at least the last time i past through.Guys a douche, but has a great healthy looking physique, with none of the obvious aging side effects of guys who have smashed themselves.