Mayweather may has a decent chin but he doesn't get hit like Bradley but i would have to give the nod to Bradley but that's only because he's been hit a lot more than Mayweather with big shots ,Bradley seems to be more resilient because he's of genetics and he's comes in such good condition while Floyd mostly survives big shots because of his excellent defensive instincts.
Rule of the thumb, ok cool:
Floyd: Corley 1X, Mosley 2X, Cotto 1X. All four were stuns and didn't drop him.
Bradley: Holt 2X, Provodnikov i lost count maybe about 5x. May have been stunned in another fight but i can't remember any right now. anyway, both against Holt he got dropped and against Provodnikov i think there was only 1 or 2 knockdowns but the referee didn't give a clear knockdown in round 1.
Conclusion: Floyd has had 14 more fights than Bradley, when he was 31-0 he had yet to be notably stunned. Bradley has been knocked down numerous times despite having far less fights so i guess Floyd has the more durable chin.
Floyd I seen fights where Floyd was solidly hit in the jaw. Judah, Mosely rocked Floyd and Canelo also rocked him..
Probably Tim. He got hit by murderous punchers like Pacquiao and Provodnikov and he stayed on his feet and won.
Floyd was hit clean by Mosley multiple times in round 2 and handled it better than Bradley did with Provodnikov.
Floyd gets hit less, Bradley gets hit more but he never seems to be hurt.
Floyd never gets hurt because he rarely gets hit but in their worst moments, Floyd bounced back better than Bradley.
rule of thumb dudes, just rate it on how many fighters was able to hit it against how many times it was rocked!
