NFL hopes to reduce head injuries with helmet experiment
NFL Releases Concussion Data After Use of 'Guardian Caps' During Offseason - Sports Illustrated
Damning report on head injuries in sport seen as 'turning point', Concussion in sport
Guardian Caps Exceed NFL's Expectations - Guardian Sports
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Southfield-Lathrup Falcons Football & Cheer
FOOTBALL: Guardian Caps gaining ground as concussion-prevention aid
Lee Hanson on LinkedIn: NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts