NFL helmet manufacturers hope to reduce concussions, save game - Washington Times
Why Dolphins QB Tua Tagovailoa now must face questions about concussions and his future - ESPN
Concussions piling up for winless Wyoming
The stunning story of a former NFL player's descent into darkness - Poynter
FRONTLINE, League of Denial: The NFL's Concussion Crisis, Season 2013, Episode 16
Chris Borland's Early NFL Exit Doesn't Mean Avoiding Brain Damage, Experts Say - ABC News
NFL Concussions: The 2012-13 Season In Review
The NFL concussion protocol cannot save football
Football research at Harvard seeks new therapies for players
The Tragic Risks of American Football
Broncos QB Russell Wilson sacked six more times in return from concussion
The Tom Savage fiasco shows the NFL's concussion protocol is not working, NFL