Coming to an NFL game near you, the Zero1, a helmet that helps guard against brain injuries
NFL's new quarterback specific helmet design – United Brain Association
Former NFL quarterback Erik Kramer injured in apparent suicide attempt, NFL
NFL Reveals New Quarterback-Specific Helmet To Help Combat Head Injury - The Sports Credential
First QB helmet designed to help reduce concussions approved
Armor on the Field: The NFL's Headlong Race to Build the Unbreakable Linebacker
NFL faces intense scrutiny over concussion protocols
High schools tackle football concussions after NFL lawsuit settlement
Chargers News: NFL, NFLPA approves first-ever position-specific helmets - Bolts From The Blue
The concussion epidemic: Should helmets be banned from football?
NFL History: 100 objects that tell the story of football - Sports Illustrated