NFL approves new targeting rule - The Boston Globe
NFL CMO Dr. Allen Sills explains importance of mandated guardian
In Brawl For Seau Brain, a Proxy War Over Concussion Science
Tennessee Football Orange helmets announced ahead of South
College programs take proactive approach to helmet safety
NFL Testing Safer Helmets
New Helmet Technology Aimed to Make Football and Other Sports Safer
NFL using helmet caps for player safety, research – News-Herald
What are those caps football players are wearing?
EXPLAINER: NFL using helmet caps for player safety, research
NFL executive hints that Guardian Caps could eventually be worn in