No, i'd bet duran might be on his period and cramp up that day. Also I thought about Hagler's chin and might change it it's just that Lamotta's main thing was his iron chin and it won him the middleweight title.
You think it was better than LaMotta's, or you're just trying to change it up? LaMotta took all the shots from some of the best punchers of all time(including flush combinations to the jaw from Robinson, the same guy who KO'd another granite chinned fighter ine Fullmer with one punch) up to HW, including a bout where he not only went the distance, but beat Heavyweight power-puncher Bob Satterfield.
Roberto Duran is an all time great. it's just slightly unrealistic to say he would beat a person like this. Also just because I don't perticularly like Duran doesn't mean i don't respect him for what he did.