I believe Barry Bonds' steroids story, even if it technically isn't the story he is telling.
Bonds, for the record, doesn't say much at all about steroids, and when he was under oath he said he didn't knowingly take steroids.
So no, I don't really believe that story. But I do believe the story that's out there that Bonds was one of the greatest clean players ever long before he became the greatest dirty player anyone could ever be.
No doubt about it, Bonds stands out -- he is quite likely both the best player and the best cheater most of us will ever see.