The CTE story is about to come to the forefront with the Will Smith movie coming out on Christmas day and more and more stories like these.

An early detection test could change sports as we know today.

Hall of Famer Dorsett upbeat in fight against brain disorder
http://news.yahoo.com/hall-famer-dorsett-upbe...--spt.html

This one from a few days ago also mentioned Bart Starr and Gordie Howe

Tony Dorsett turns to controversial stem cells thanks to old friend
http://www.usatoday.com/story/sports/nfl/2015.../73480230/