one KO doesn't cause CTE, it is the consistent concussions over time. The majority of damage done to boxers brains is done in sparring.
Yes it does, One KO can you kill you
you never fully recover from a KO like thats long term damage especially when you out like that
When Manny 54 he might be the same way because of the Marqeuz KO
but Terry Norris was dog type of fighter, I take and give it type style, so he took lot of damage almost 60 fights
that's mayweather promoted defense first, because all that damage adds up over time
mayweather spar hard but he don't take a lot of damage
if you taking a lot of damage in sparring they usually pull the fighter out for the day