1. Floyd Mayweather Jr: Floyd is an EXCEPTIONAL talent, amazing, incredible, other wordly....but there have been fighters that good before and they have lost before. I do believe a couple of styles of fighters COULD beat him though as flashy as Floyd was over his career he was also cagey and one of the smartest fighters to ever lace up gloves so he never allowed that to happen. The "how do you beat him?" question is one specific to style of fighter...ie "What are we working with?" with fighters like Duran or Cotto or Leonard you'd want steady pressure applied with scoring jabs followed with bursts of letting the hands go followed with slick boxing you'd want a minute of each in each round. With someone like Tommy Hearns or Shane Mosely or Paul Williams you'd want to score with the jab (notice something?) create and control distance where Floyd would need to follow you and then you set traps for him (that's a Teddy Atlas line if I've ever written one!) walk Floyd into a punch (very very difficult to do which is why nobody did it). With a freak of a fighter like Ray Robinson, Willie Pep, Sweet Pea Whittaker, Henry Armstrong, or Lomachenko or Emmanuel Augustus you'd want to knock Floyd out of his rhythm, you'd want to shoot lead crosses and uppercuts, let the hands go but this is playing with fire, this is just waiting for Floyd to catch you with a hook or uppercut....ah but feint! Land first and hard, then you can begin feinting, when Floyd tries to score any points back with clean effective punching you MUST counter and hard....this is a 4D chess match played on a rollercoaster near an active volcano, the highest of high stakes, destined to be a lot of waiting and thinking but if fought with a sense of urgency it would be a beautiful thing to behold. I do still think Floyd's Father Floyd Sr. and Uncle Roger have given the best examples on how to stop Floyd's style...it's just the same as when Mike Tyson was around and "unbeatable" nobody all that great fought in the manner you'd have to fight for 12 rounds in order to beat him. Buster Douglas blueprinted that.....the Mayweather style has restrictions, only nobody Floyd has fought so far has exposed those and that's no disrespect to Floyd's skill, he's raised the bar for everyone around 130-154.

2. Andre Ward: Look at Bernard Hopkins....how you beat him is how you beat Andre Ward only Ward is still young enough to be extremely fast so anything you did with BHop you'd have to do harder against Ward AND watch out for returning fire.

3. Joe Calzaghe: You beat Calzaghe the way you beat Pernell Whittaker or Naseem Hamed...lead right hands, bully him, wrestle

4. Edwin Valero: Know that he's swinging for the fences, know that he's great to the body, stick and move pure and simple this is the old hit and don't get hit game sweet science. Make sure your footwork is right, when he's in close you smother his attack, when he's at distance you feint in land a few and tie up. Bully him with the jab if it's in your arsenal.