Was thinking about this after Silva got busted for steroids after his fight last weekend. I think its an extremely low number.
Now, I dont think you necessarily have a lot of guys who consistently take HGH or cycle on steroids or whatever. I absolutely believe that at times most of these higher level college, pro, olympic athletes have taken something illegal. I think there are probably a lot of Brian Roberts out there who just felt the need to take something at certain times. I dont necessarily think Roberts only tried roids once, but I also dont think he was doing it consistently year after year. Same goes for Silva as he was trying to come back from a long layoff at age 39. I don't doubt he fought a lot of his fights completely clean. I also doubt this was the first time he took steroids before a fight.
SO, how many of these high level, money making athletes have never touched anything illegal. I think its probably under 20% and I feel like Im being pretty conservative..