Tyson by early KO. Probably within about 3 rounds. Tyson was simply too powerful, too fast, takes a better punch, and is even a little bigger and stronger than Smokin' Joe. If Frazier somehow manages to survive and make it past the first 5 or 6 rounds then he has a shot of pulling it off because he is the better inside fighter of the two, but I wouldn't count on that hapening.
Hate to say it as joe's one of my favourites but i don't think he'd last too long with tyson. Probably longer than his son marvis tho, although thats not hard
I pick mike too but dont you think it couldve been a hell of a fight at their peaks? i think the ali fight in '71 took a hell of a lot out of Frazier...even Foreman stated that Frazier was the only person in boxing he has feared, but he feels the Ali fight was his pinnacle and he wasnt the same man again (only performing against Ali out of sheer resentment for the man) i think a peak frazier is a hugely underrated fighter, and someone who I have in my top 6 ATG heavyweights..