The last fighter you would have clearly favoured to beat Floyd Mayweather Jr.

[Anthony342]

As a welter, I'd go with Whitaker or Leonard. Whitaker's defense, with some jabbing and bodywork, would win it for him and Leonard would go after him hard, like Hearns 1 or Duran 1 and either get a close unanimous decision or a late stoppage, probably the 11th in a 12 rounder.

[Panamaniac]

In top physical & Mental condition I think these men would defeat Mayweather!

Shane Mosley
Oscar DelaHoya
Tito Trinidad
Pacman
Petey Whitaker
V. Forrest
D. Curry
Marlon Starling
Ray Leonard
Tommy Hearns
Roberto Duran
Jose Napoli (Did you mean Napoles?)
Emile Griffth
Stan Harrington
Kid Gavalin
Carmen Basillo
Sugar Ray Robinson
..........theres a few others I'm sure, some toss ups might be;
Lloyd Honygun sp)
Mark Breland
Milton McCrory
Floyd Mayweather Sr...hahahaha!!!
...............also more here that could have given him good competition.
Theres 17 I believe could defeat Floyd and another 4 to probably 10 that would give him very good competition. Floyd is very good but not great! Ray.

Glaring omission from the Fab Four(see red above): The Marvelous One (Hagler)

[Ray Corso]

Floyd doesn't fight at 160lbs, so no Hagler!!! The fighters I mentioned all fought at 147 at some point in their careers! I'm sure I could think of some more men like Stan Harrington who is unknown on the forum but one tuff man who fought at 47 and 60 and as a southpaw was a difficult opponent for many high caliber fighters.
Stan beat Robinson late in Sugars career but non the less he did it more than once. He has wins over a few excellant fighters!!! Ray

[PAC-BOY]

Whos Floyd Mayweather Jr?

[Ray Corso]

Floyd Mayweather Sr. son! Ray.

[Panamaniac]

Floyd doesn't fight at 160lbs, so no Hagler!!! The fighters I mentioned all fought at 147 at some point in their careers! I'm sure I could think of some more men like Stan Harrington who is unknown on the forum but one tuff man who fought at 47 and 60 and as a southpaw was a difficult opponent for many high caliber fighters.
Stan beat Robinson late in Sugars career but non the less he did it more than once. He has wins over a few excellant fighters!!! Ray

You got me on a technicality there. Since Duran fought Hagler and he's listed, I figured them to be roughly in the same ballpark weightwise. Still, on the basis of styles and Hagler's punching power, I think he would knock Mayweather on his - shall we say - donkey for the full count...

[DeepSleep]

At 147 I think quite a few of the all time greats would be favored over him just based on his small frame. At 140 and 135 I think the list would narrow down to a only a select handful.