I think Marciano would eventually find Ali over 15 rounds

[Beanflicker]

Ali was far far from a perfect fighter. Once Marciano got close ( and he would, because he'd make Ali move into him to land his jab) Ali would have problems with his activity and those punches would slow him down.

That could be true. I wouldn't count Marciano out of that one.

Actually I give Marciano a much better chance of beating Ali than I would of him beating the big bombers who came after him (Liston, Foreman, ect).