Quote Originally Posted by JT Rock
Although I do feel these guys would KO Marciano

Liston
Foreman
Frazier
Holmes
Norton(perhaps)

The rest of you list is like a Screen door on a Submarine though....
I agree with the original post that Ali would be 49-0 with 49 KOs, but realistically, I don't think Marciano would be able to complete the 61 fights Ali fought, as I too think Liston, Foreman, Frazier, Holmes, and Norton would KO him, and in all likelyhood they would be brutal KOs, so bad in fact (and I'm not trying to be funny here) that afterwards he would be unable to be sanctioned to fight in any state.