A fighter's greatest win is usually somewhere in the middle of his career, not the twilight. How many can you name where their greatest win was their last win? I'll get the ball rolling with: Leotis Martin and Kiyoshi Tanabe - both fighters saw their career trajectory go straight up with KOs of Sonny Liston and world flyweight champ Horacio Accavallo, respectively. Only for it to come crashing down as both fighters suffered detached retinas in their greatest ever bouts and went straight into retirement.
Doesn't get much better than stopping the next generation during a fight you took on short notice and didn't have time to be in shape for. And that wasn't even a tame stoppage -- had that fight continued, pieces of Vitali's face were going to be literally torn off.
Obviously at that time it wasn't his best win, but Sanchez beating Nelson with hindsight is arguably the best name he beat with the career Nelson went on to had.
Yeah I already said at the time it wasn't Sanchez's best win, I'm speaking in hindsight with the career Nelson went on to had. But if you want another example Ward retiring with two wins over Kovalev was his best wins of his career.
If you consider newspaper wins (I.e. where the majority of the published press scores favor one fighter), then Packey Mcfarland, a natural LW, beating a top 10 all time MW Mike Gibbons, albeit it wasn't contested at the MW limit, was arguably his best ever win. Not bad considering he had retired 2 years earlier, had not had any warm up fights and was considered to be a little out of shape.
Man, you guys are awesome! These were great. I'm struggling to put some together, but I did come up with 2 more. Thad Spencer - Beat Ernie Terrell in the 1st round of the heavyweight tournament and was suddenly touted as the favorite to win the tourney, but that was it. Couldn't get a win in his last 9 bouts after that. Wallace (Bud) Smith - had a journeyman record of 29-13 when he fought for and won the lightweight title from Jimmy Carter. Successfully defended it against Carter and then he spiraled losing his last 11 before calling it quits. This one is a bit of a stretch, guys, because his greatest win clearly was winning the title. However, I put this in because he likely made a greater purse with this being a title defense with him as a champion. Again, a bit of a stretch, so forgive me on this one.
What about Masso Oba's vs Chartchoi Chionoi? As my #11 all time ranked Fly, he's the "greatest" Flyweight I consider he beat, though arguably Beulio Gonzalez, my #12 all time at Fly, was a little closer to the absolute peak that was in his future, than Chinoi's was to his in the past, when Oba beat them.
Joe Louis knocking out Walcott before his first retirement. Some might say that was his best win so it's worth a mention.
I think that's a great pick, Greg. We might split hairs a bit on what one considers the greatest win, but I think it's a great choice.
Pedro, I see where you're going with this and I will say kudos for inventiveness. But if I was on a panel, I would probably say this is a push. Last should mean last.