BoxRec

GGG has to be right up there. I've never seen him flinch. I swear you could launch a rocket underneath his chin and he'd just carry on walking forward.

Floyd "Jumbo" Cummings did well to hang on when Bruno caught him with a solid right in rd 7 of their epic fight. That punch made the one that rocked Tyson in their first encounter seem like a love tap.

Frank Bruno may well have had the hardest single shot in boxing history since Marciano. That reminds me, Dennis Andries had a fantastic chin. He took many great, and one fantastic shot from Tommy Hearns - yet the man somehow kept getting back on his feet.

Any mentions for Oliver McCall? He might hold the record for number of HW rounds contested without going down. Immense chin, frailties elsewhere of course...

Marvellous Marvin

I forgot about McCall. He had that nervous breakdown in the ring and just basically quit in his 2nd fight with lennox lewis.
he was crying and getting blasted with big shots and it didn't really even phase him. Lewis had a cannon right hand too.
i forgot all about mccall.