2. Barry Bonds

Position, Team: Leftfielder, Pittsburgh Pirates/San Francisco Giants
Years: 1986-2007
Barry didn't end up on this list for his 'roid use alone. If that were the case you'd see Sammy "Casper The Ghost" Sosa and Mark "My Neck's Bigger Than Your Thigh" McGwire right alongside dude. It's just the arrogance and fuck you (you meaning the media and anyone who wasn't a Bonds fan) attitude that he maintained throughout his 21-year career and especially during his passing of Hank Aaron's home run record. You blame him, though? You'd be pissed too if small balls were a direct consequence of your success.