Yet Holyfeild has never been tested positive for a fight so if he has for 25 years and has not been caught then i am sure ever pro who does not do blood testing is on them. I mean if your career on the line and you can get better why not i honestly think they should be legal because everyone is using anyway. I mean with no retirement plan might as well take what you can get because fans only like you when you win and forget you when you lose. So if your a fighter i can see it being pretty easy chose to make to be honest with you.