Floyd Mayweather Jr.

Think Floyd Mayweather Jr. just floats in the ring? More like a ghost with a vendetta. In the 'Greatest Boxers of All Time' arena, it's like watching a chess master at work—if the chess pieces could throw uppercuts. Fans? Oh, they oscillate between idol worship and pulling their hair out over his defensive style. Want a real debate? Try convincing a Mayweather fan that defense isn't everything in boxing. Good luck!