NFL CMO Dr. Allen Sills explains importance of mandated guardian
Bellmore-Merrick athletics debuts new guardian caps
NFL Testing Safer Helmets
EXPLAINER: NFL using helmet caps for player safety, research
Explanation: NFL using helmet caps for player safety, research
Bennet Omalu, Concussions, and the NFL: How One Doctor Changed
Can a Better Football Helmet Save Your Kid's Brain? - Washingtonian
Virginia Tech lab releases first safety ratings for youth football helmets
From Head To Toe And More - Mississippi State
Helmet manufacturers work on safer youth equipment