75% of the former football player brains studied show CTE. But they only study the brains of players who were suspected of having CTE, so we really have no idea what the percentage might be across the entire pool.
There is always a price to be paid for playing such a brutal sport. I have dealt with shoulder pain my entire life, which started with an injury playing HS football.
I did not know that Bo Jackson said that he never would have played football if he had known the CTE risks. Of course, he was also a special baseball player, so I am guessing that he meant that he would have just taken that route.
I wonder what the CTE incident rates are for soccer players. They also experience a great deal of head trauma.