How would F. Mayweather in his prime have fared against any of the Four King`s title opponents?

The Four King's best title opponents were each other so I'll go with that. He loses to Leonard without a doubt. Hagler and Hearns should beat Money but could lose to him depending on the styles they employ for the fight. It hurts my heart to say it but his best chance to win is fighting Duran at welterweight.

 

Poorly.

 

You are talking dozens of challengers over virtually a handful of divisions.

I'm going to take a wild guess and say wins some, loses some.

How do you think he would fare against a 175 pound Iran Barkley Mark? I think size wins this one.

 

Yup.

 

Considering how good was the four king's opposition my bet is that Floyd becomes just another contender in the pack, losing a lot of fights.

In a quick take I think Fairweather loses clearly to Benitez, Barkley and Hill. He probably also loses to Buchanan, De Jesus and Pipino.

 

Mayweather beats Leonard all day long.
The worst opponent for Mayweather is Hearns. His reach, jab and cracker of a right hand give him the edge over Mayweather.

 

Stop day dreaming.
Mayweather beats anyone his size.

 

Hall of shame. Sad.

 

It's reality, whether you like it or not. Mayweather is too skilled.

 

Smaller, fragiler, softer hitting, less skilled, weaker and a LOT less proven. That is Mayweather next to Leonard. He’d be mince.

 

Smaller yes.
More fragile, debatable.
Softer hitting, probably.
Less skilled, no way. FMJ is vastly superior.
And more than proven.

 

Floyd isn't beating Ray Leonard.

Nope, No and NO.