Marciano ALWAYS has a punchers chance. That's all he ever had. He would take 4 punches to get 1 in. Before the KO in the 13th round in the Walcott fight, Walcott landed 3 times as many punches as Marciano. But he was a former catcher, actually tried out for the Cubs. He didn't make it because of a strong arm. He fought in a crouching position and while he wasn't fast, he was explosive. And had about as hard of a right hand as boxing has ever seen.

And RJJ would probably bust him up real real bad. Wouldn't be a problem for Rocky, he fought Ezzard Charles with a 1 inch split up his left nostril. Every time he breathed through his nose, it would flap. Spectacular fighter Marciano was. But I really don't think he would catch RJ. Honest feeling. Prime RJ is pretty close to untouchable. But you can never say that with absolute certainty. And if he did end up on the business end of a Marciano lunging right hand, good night RJ.

So my gut says RJ, my brain says RJ. I guess my heart is indifferent. But by no stretch of the imagination would it be surprising that Rocky catches him and knocks him cold.