Rocky Marciano with Ali's competition: Does he stay undefeated?

the right hand that almost killed Walcott vs the left hook that floored and beat Ali, both about equal on savage body shots, Marciano with maybe a slight advantage on uppercuts, both always pressing and never backing up, both looking to time and land their power shots every time the ref might separate them, but such great inside fighters that they probably wouldn't get separated that much, good enough chin and heart that even if they eat a couple of each other's power shots they're still getting up, Marciano has the potential to hurt Frazier when he's coming in a lot worse than Ali did, both have so much dog in them and the ability to bang in the deepest water

 

Liston
Foreman
Holmes

 

He'd lose to Frazier and Foreman, that's a certainty imo.

 

I give Floyd a chance, maybe a good chance. He might've chopped up the Rock with those swift hands.

 

Sonny wouldn't need to chase Rocky. And nobody who ever stood and traded with Liston survived. Prime Sonny by KO.

 

No way in hell he stays undefeated for multiple reasons styles size speed ect

 

There's a good chance of that.

 

Agreed, also if he tries to run the , Liston, Frazier, Foreman , Lyle ,Shavers gauntlet his career would be MUCH shorter.

 

Rocky wouldn't make it, and IMO no one would make it.
If a heavyweight champion was always in prime, and didn't age, we could still discuss this topic.
Muhammad Ali's career lasted 21 years (1960-1981) with a break of just over 3 years. If someone had been boxing professionally for 20 years (and would have lost even before that), and then beat Holmes; It is impossible.
If the scenario were to start boxing professionally at a very young age (like Canelo, for example) - he would lose at the beginning of his career.

 

Nobody, who ever boxed, could remain undefeated with that run of opponents over that timeline.