Take two guys from the same weight class who are all-time greats, and make the biggest mismatch you can. Starting with: Tyson vs Fitzsimmons
George Foreman-Joe Frazier Frazier of 2-4 years earlier fares marginally better against prime Foreman. Horrendous style matchup for Joe.
Sorry, misunderstood. I just thought you meant list some epic mismatches. Well, in that case I'd say: Marvin Hagler vs Michael Spinks. Hagler was the middleweight champ, and Spinks was the lightheavy champ. Had Hagler moved up and tried to challenge for the belt at 175, Spinks would have become the first one to stop Hagler. Mike was just FAR too big, and too powerful for little Marvin.
Good one. Same case as Spinks vs Hagler. Monzon was wayyb too small for Foster, and would get murdered. Tyson vs Marciano is another that always comes to mind. What's sad is, there's old timers that would actually have you believe Rocky had a chance. 185 pound Marciano vs 220 pound Tyson. Rocky would have been brutalized.