What Percentage of boxers become "Punch Drunk"?

Question

Please do not guess. How many boxers end their boxing career without being "Punch Drunk"

Answer 1

50/50

Answer 2

I'm not sure of the percentage but I know of a few famous boxers that because ''Punch Druck''..  Jack Dempsey, Joe Louis, Beau Jack and, more recently, Jimmy Ellis, Floyd Patterson Bobby Chacon, Jerry Quarry, Mike Quarry, Wilfredo Benitez, Emile Griffith, Willie Pep, Freddie Roach, Sugar Ray Robinson, and Meldrick Taylor.

Answer 3

The boxers that become "Punch Drunk" as you say are fighters who just take to many shots to the head. Either beacuse they could not protect them selves or out skilled or just because they were in the ring.

If you take a look at a pic of a brain of a 7 year pro  boxer

you will see many black spots which mean Dead Brain tissue

On average the fighters who get hit the least will have a longer career but the guys who go all out will have a short lived career.