Legendary NFL safety Ed Reed appeared on a 60 Minutes special titled "Football and the Brain" that explored the prominent player-safety issue of traumatic head injuries in football.
Numerous former players have been diagnosed with the degenerative brain disease CTE after repeated blows to the head. Reed said even if there were a test available to determine whether he had CTE during his career, he wouldn't have done it, per the Huffington Post's Maxwell Strachan:
If they're going to give me this test and this test is going to be a negative towards me as a player and I gotta go home now and I can't play this game anymore, no.