Top 10 Toughest Unbeaten Boxers of All Time

The Top Ten

1 Rocky Marciano

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

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 - donovanthorn

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.

Best - lucaskt

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

Its just because his a cheater..

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.

3 Ricardo López
4 Joe Calzaghe

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.

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.

5 Jimmy Barry
6 Jack McAuliffe
7 Chris John
8 László Papp
9 Edwin Valero
10 Harry Simon

30 fights 30 wins 23 KO.

The Contenders

11 Ike Ibeabuchi
12 Terry Marsh
13 Pichit Sithbanprachan
14 Kim Ji-won
15 Sven Ottke
16 Young Mitchell
17 Deontay Wilder Deontay Leshun Wilder is an American professional boxer. He has held the WBC heavyweight title since 2015, and in doing so became the first American world heavyweight champion in nine years, which was the longest period of time in boxing history without an American heavyweight champion.

This guy would've killed any version of Ali or Tyson.

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