Re: Could Marciano have feasibly went 77-0 in place of Dempsey?
Nah, Marciano got in the game late and his already banged up body was lucky to hold up as long as it did.
Dempsey was fighting professionally since he was 19.
I don't think Rocky would have lost to Tunney twice though. If he had lost his drive as much as Dempsey did during his celebrity years, he would have just hung them up. Marciano strikes me as an "all or nothing" kind of guy who wouldn't have fought on if he wasn't completely commited.