Floyd Mayweather fought guys who were in their primes and at least consider good fighers and won. Marciano fought mob controlled fighters, bums...
Joshua knocks all of these fighters including Marciano out in 1 round. Because he is true modern sized heavyweight and neither of these fighters are .
You forgot to add Ted Lowry who beat Marciano and got robbed. You also could add David Tua, Tommy Morrison, Lewns Lewis, Anthony Joshua, Deontay...
Clancy helped Foreman shorten up his punches a little so yes he helped him. End of story.
Beautiful story. Then you realize Tyson stated George Foreman was a bigger puncher than him. Wladimir fought Everett "Big Foot" Martin Twice and...
Brilliant story. Then you realize that same Ross Purrity knocked out Wladimir Klisthcko. So your point is?