Who took the least pumishment in their career?

Duran never really was beaten up badly except one time. That is why the Hearns fight was so shocking. People never saw that happen to him before, let alone hit clean like that. Even with Barkley, that left hook which turned Roberto around was not as bad as people thought. He was almost riding with his whole body and it forced his body around, but it didn't really catch his chin because Roberto moved his body to the punch. Had his chin taken the force and his body not gone with the punch, I think that punch would have hurt Duran. He saw it coming. It looked worse than it was.

 

I remember hearing that an MRI revealed Duran's brain shrunk from trauma.