Failing a drug test would be proof. Hasn’t happened yet.
Not to the bozos defending Barry on this forum. Besides, it's a worthless argument when even those people chanting "But you can't proooove that he did it" themselves believe that he knowingly used steroids. You believe he did it, everyone on this forum believes it, even dogs know that the guy's a juicer. Furthermore, as one of the previous posters pointed out, Barry has admitted to using steroids, he just lied about how much, how often, and whether he did it knowingly.
Seeing all of these posters coming out to defend this obnoxious, loathsome disgrace to the sport makes me wonder if this is some kind of psychological preparation for when Hillary takes the White House.