First of all, sorry to ask you guys to do my research. I just thought you may be able to direct me to a list of defenses by each heavyweight champ, or just know the answer off the top of your head. The names I can think of are Michael Moorer (beat Holyfield, lost to Foreman,) Shannon Briggs (Beat Foreman, lost to Lennox Lewis) Buster Douglas (Beat Tyson lost to Holyfield) Leon Spinks (Ali, Ali) Ingermar Johansson (Patterson, Patterson) James Braddock (Baer, Louis) Evander Holyfield (Bowe, Moorer) - I think he's the only won who won the title more than once, but lost the title with zero defenses in one of those reigns) What else am I missing? It can include someone winning the title twice in their career too but losing it on the first defense in either reign I really appreciate it, I'm a dork and want to run a round robin on a computer simulation game and can share results if any interest at all, lol. Though for the tournament I may just do guys who won the title once (like everyone in my above list, I think anyway) Thanks!