I posted about this back in The Ring a week or so ago:
You literally do not want to go toe-to-toe with a Mexican boxer at any point because they have on average the lowest occurrence of the APOE E4 allele. That means they don't get CTE because their brain recovers and regenerates from the trauma to it. They can slug it out and not suffer the mental consequences whereas most other people can't. Joshua needed to box and finish the fight safely once dude was stunned.
The fact dude can "party" after a HW fight and he doesn't sound punch drunk is an example of that.
35 years old, 35 fights bad diet habits, gone past 8 rounds of Heavyweight boxing 11 times and look how fluid his speaking is. No stuttering, slurring or pausing in his speech whatsoever.