Top 10 Toughest Unbeaten Boxers of All Time

The Top Ten
1 Rocky Marciano

Should be number one Mayweather is not and never will be as good as Rocky Marciano while Mayweather whould be a joke and hugged his opponent Marciano actually fought and fought far more talented fighters and got more KOs the mayweather and better in every way

Marciano is able to be number 1 because of an impressive record. If pep say that was not a basis, then who's deserving? Mayweather? Had to finish the fight because of business haha

Ones life experiences prior to the fight influences the warriors and plays such a big role that it could almost specifically predict what happens in the ring

Anyone that. Says rocky Marciano isn't #1 is retarded

2 Floyd Mayweather Jr. Floyd Joy Mayweather Jr. is an American former professional boxer and current boxing promoter. ...read more.

Not my type of fighter but he defended his self against the best and come out on top sugar ray Lennard would been a good test for him someone of skill and speed just as him I always thought he pick an choose a lot of his fights.

He uses his BRAIN inside that ring unlike his haters! Forget about street fighting this is boxing. Greatest sports man would USE BRAIN more than anything. 50-0

Absolute great boxer, defense is better than anyone in history!

He fights as hard as he can and concurs what needs to be done

3 Ricardo López
4 Joe Calzaghe

Joe had best boxing ability I ever seen at medium range, his timing was perfect and punches flew combo's of always 4's and 5's. fast as he was in his 20's he slow a bit in his 30's that take smack out of his punch. but I do like watching his early fights when he was a rising star. think he could of been promoted better as he didn't get to fight the like of Roy Jones and Bernard Hopkins till he was fading a little, it was born in the wrong era

would like to see him fight: Marvin Hagler that would of been a test for him and nigel
benn who would of tested his heart. all said an done he defeated some highly talented fighter's for that I would rate him in the top 6.

This guy is so underrated and why? Because he's from Wales. If he was American he'd be considered gods gift.

He was brilliant timing opponents watch the fights before he went down hill you see what I mean.

5 Jimmy Barry
6 Jack McAuliffe
7 László Papp
8 Edwin Valero
9 Ike Ibeabuchi
10 Harry Simon
The Contenders
11 Pichit Sithbanprachan
12 Terry Marsh
13 Kim Ji-won
14 Sven Ottke
15 Young Mitchell
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