Ali would dance around Marciano all night landing jabs and right crosses at will. Rocky was too short, Ali too tall and fast.

Rocky never faced a guy with the footwork and handspeed of Ali, while an after-prime Ali beat bigger and stronger fighters in Foreman and Frazier. Not taking anything away from the only undefeated champ, he had heart but he also never fought Ali.

If we're talking an 'in their prime' fight then call me crazy but I'd pick Ali.