I don't even think Mosely could do it...or Armstrong.....maybe Ike Williams, but somehow I see Duran evading a ko even from him.
I think you'd have to go to junior middle and middleweight for anybody having the stuff to stop Duran.
I don't see any fighter at 135 knocking out Duran via attrition. At 140 I give Chavez a slim chance (<10 %) via attrition, but this would have to be a 1988/89 Chavez. Arguello might do it, but he would be losing when he did it. It would take a shot like the one on Pryor in the 13th round of their first fight, but on the chin. Maybe Ike Williams (<10%). If you put a gun to my head, I'll take Arguello. But I'd be writing out a will before the fight.
Robinson is the pretty clear favorite if he counts. I think De La Hoya would have a much better chance than most. I'll give Corrales a dark horse pick. He had two handed power and could deliver punches with leverage like Hearns. Sent from my iPhone using Tapatalk
Zad, of the modern lightweights I have a motivated Benny Leonard who was said to have seldom gone all out with his opponents, to not scare them away from a money rematch, as a reasonable possibility to stop Roberto Duran, because Benny Leonard by those who saw him rule the lightweights for 7 years considered the great "Benah", as good a lightweight as Ray Robinson was as a welterweight. As for 140 pound modern fighters the much forgotten Jimmy McLarnin was a powerful puncher who could hit very hard. And of course in my time I feel that Ike Williams who I saw flatten BeauJack in Philly was at his peak a rangy devastating puncher and the best lightweight I ever saw ringside...At 135 Ike was tremendous...But so was Roberto...
I think Duran was the top of the food chain at 135-140...but if I HAD to pick someone to KO him...Mantequilla Napoles.