Ezzard Charles was 32 when he fought Marciano. That isn't very old.

Joe Louis was 37. Is that old when fighting a "bum" like Marciano(as some people in history have considered him).. 37 is not old for an all time great HW.

you're right Clay and Spinks could not hurt Marciano. I think he could get under the jab. I think his unorthodox stance would frustrate the living shit out of Clay"s flicking jab. I think Marciano had the perfect style to fight Clay. Clay would land FUCK-ALL jabs or hooks. Marciano on the back foot and punching up from the floor.