Could ANY other welter/middle/LH have taken Hearns' shots in round 1 that hagler did

[THE THIRD MAN]

Hagler was a tough nut, he was hurt alright. He was cut too, that cut was serious and if he didn't knock Tommy out in the 3rd it is unlikely Hagler could've continued beyond rounds 4 and 5? It wouldn't have been Hagler's choice, but the cut would've seen a stoppage.
As it happened he took all of Tommy Hearns best shots and survived, he then stepped on the gas after being cut and finished the job. Hagler had a granite like chin and i think Tommy Hearns was genuinely shocked Hagler didn't go down after landing so many big shots. If anything it appeared to have galvanised Hagler and he was relentless for the next two rounds. Would loved to have seen a rematch, but c'est la vie.
As for any others, Monzon would've taken all Hearns shots and probably KO'd him the same way Hagler did.