Leonard, Hearns, and Duran go a combined 6-0 over Mayweather and Pacquiao with Hearns giving both KO or TKO losses.
floyd is the best defensive fighter of this era and only second to sweet pea in the modern era. SRL said FM Sr. was one of the slickest fighters he fought and he had to still be careful when he fought and beat him. Secondly we've only seen floyd get hit cleanly 3 or 4 times MAX ( I mean BUZZED ) in 42 fights ... The only one out of the three that out works floyd is Sugar Ray... that's it. Duran is a more refined Pac... but his style still gets picked apart by Mayweather. Pac goes 0-3 he could get lucky and starch Duran only because of wild punches.
Put it this way, if SRL or Hearns caught Floyd with the shots that Mosely did (and they most certainly would have), that fight would have been OVER, pronto.
Not well. Though in fairness, look at the size disparity. Leonard and Hearns started out winning titles at 147.
Floyd destroys Duran with a check hook, sending Duran's head into the ringpost. Floyd clowns SRL for 12 rounds after a 4 year lay off - doesn't go for the KO just so he can get some rounds in. Floyd punishes Hearns Gatti style.