The study found C.T.E. in all but one of 111 brains donated by National Football League retirees and their concerned families. The brains of 53 college players were also included in the study; 48 showed C.T.E. Even among those who played only at the high school level, three of 14 players showed the telltale scars. is linked to football.” (A 2015 Mayo Clinic study found the disease in the brains of 21 of 66 men who played contact sports — mostly football — but no traces in 198 others who did not play contact games.)

Source: New York Times July 29, 2017 20:03 UTC