That study has a selection bias; the athletes' families all suspected that their player had CTE. So it's not accurate to say that 91% of college football player

That study has a selection bias; the athletes' families all suspected that their player had CTE. So it's not accurate to say that 91% of college football players will get CTE. But, it's still an enormous indictment of the sport. Enough that when that study came out, I just lost all taste for watching football. (Which was not a stretch, I never followed much, but I did occasionally pay attention or watch with friends.) With those kinds of numbers, I think it's fair to say that if you play college football, your chances of developing CTE are very high. I think of it as similar to smoking cigarettes and lung cancer. I just think it's important to be clear on the parameters of that study, which means being careful when citing the numbers.