Imagine every heavyweight in his era had Oliver McCall level durability. Tyson s speed, combination s and over all aggressively attacking style still works well, but his stoppage ability disappears. How's this affect his career?
Well he did stop Pinklon Thomas who I consider to have a very good chin. Tyson had to hit him with 20 consecutive punches but he still got the job done in the end. Larry Holmes also had a very good chin aswell he was only stopped once in 70+ fights by Tyson. I also remember footage of McCall sparring Tyson in preparation for Tokyo. And McCall walked out of the ring after feeling some of Tyson's body punches. So I don't think it alters too much quite honestly a prime Tyson can still stop iron chinned fighters. Simply because his overall attributes are still so much better.
It would be like the Ribalta fight where the ref ends up stopping it and they end up with severe brain damage
