Errol Spence's prime would be Cuevas-esque in length after an evening with Duran. He won't get knocked out, but he'd get beaten up.
I think you must've made a mistake and accidentally typed Roberto instead of Ossie. http://boxrec.com/boxer/8953
Spence brawling the Montreal Duran in a phone booth? Only a poster like Duranimal can describe this fantasy fight for us. Where is he?