The only unbeatable fighter at the moment is Kovalev.
He will never lose. No one will ever beat him... In ANY era. He beats any LHW (or SMW) in the history of the sport.
It's impossible for him to lose, he's simply too good. There's no way somebody could outbox him for 12 rounds and absorb his power... Without merely being in there to survive (I.e, Hopkins)
He will go down as the GOAT LHW and a top 5 fighter of all time. It is what it is.
No fighter has ever come close to that standard, nor will they ever. That's the great thing about boxing. It doesn't take that much force to put a man's light's out, even if the man in question has got a chin like Toney, Hagler or Chuvalo. A fighter can take his chances and throw a big shot and catch a guy, even if they have excellent defence. Nobody is immune to that. To give an example - look at a fighter like say Whitaker. His head movement is fantastic and all, but against a guy like that, just take your chances and guess where his head will be and you might put him away in one punch when his head moves into it. Nobody is unbeatable.
Also, the responses of this thread have been predictable. Tyson, Roy Jones. Goes to show how many people we have who don't know their boxing that well on this forum. Jones is somewhat understandable, though with the way he fought he'd be much more vulnerable to the 'lucky punch' than say a Floyd Mayweather type fighter. Tyson however - forget it. He never fought anyone good enough to prove it in his mythical prime. A good fighter, but extremely overrated.
- Roy Jones from the Montell Griffith rematch
- The comebacking version of Vitali after the 4 year layoff (there's no such thing as a prime Vitali)
- prime Tyson
To people saying Mosley at 135 - would you favour him to beat Duran and Whitaker at that weight?
He loses to both Duran and Whitaker, and probably Mayweather (at least the one who got more adapted to the weight). He'd have his hands full with other lightweights like Ortiz, Chavez, and Buchanan as well.
His size advantage does help, though.
For those picking Floyd Mayweather at 130...maybe.
I think Mayweather beats Arguello, Arguello beats Chavez, but I'm not sure about Mayweather beating Chavez (or Camacho).
Camacho Sr. would give Mayweather hell.
Ali would have beaten every heavyweight, but I'm not sure about any fighter. He was definitely made for this catagory though, as was Rjj.
I would give the Ali of '66-'67 a pretty good shot at beating any fighter in history but I'm not sure either if he'd actually beat them.