I would take Tyson by K.O but who knows if Rocky lasted 5-6 rounds he could maybe pull one out of the bag and stop mike late.
Tyson would pummel him and if he didnt get to do that he would eat his children---wait,,, did Rocky have children?
Tyson was faster, hits harder, better defense and prolly better chin too. Marciano has great stamina but that wouldn't matter as he will not last 6 rounds with a prime Tyson anyway.
Marciano by late KO if its a 15 rounds fight since he has a lot of stamina. He would take Tyson's bombs in the beginning of the fight and KO a exhausted Tyson by the end of the fight.
You allways have to give Marciano a chance with anyone he coud reach and he could reach Tyson. However Tyson was just as good at avoiding punches as he was at landing them. There would be a lot of action and Marciano is dangures as long as the fight keeps going. In the end Tyson is to fast. yson scores at least one knockdown in the fight posibily more. I can see Marciano beating the count on the first knockdown, but with each knockdown that fallows the chances go down. I also think if Tyson scores 3 knockdowns which is likly the ref would stop the fight.
Why is that some people think that if you survive the early attack of prime Tyson, that somehow guarantees you victory in the fight? The Tyson of old wasnt' the same guy in the late 90's, 2000 who gave up after a few rounds. He could knock you out at any point in the fight. See: Ribalta, Thomas, Ruddock, or any of his fights where he went the distance, and you'll see that he's active the whole time. Tyson had GREAT stamina in his prime, yes I said great stamina. He never gassed out back then -- he slowed down in some instances but nothing more. I can't ever see a small guy like Marciano beating Tyson, even if his life depended on it.
Marciano would back Tyson up and knock him out. Tyson can't fight well backing up against good fighters.