Coverage of the NFL in Guardian Caps
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games, National
NFL reports reduction in concussions among players who wore Guardian Caps in preseason - The Athletic
Could Guardian Caps be used during NFL games for player safety?, Pro Football Talk
NFL hopes to reduce head injuries with helmet experiment
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Could Guardian Caps be used during NFL games for player safety?, Pro Football Talk
Guardian Cap Debuts at Training Camps League-wide
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77