Buffalo Bills Accustomed to NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Buffalo Bills News, Analysis and More
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Guardian cap' to prevent head injuries mandated for practices, CFL says
Here's why some Patriots players are wearing caps over their helmets during training camp
NFL introduces Guardian Caps across league to limit number of brain injuries in preseason
NFL's top doctor does not expect Guardian Caps to be worn in games - NBC Sports
NFL hopes to reduce head injuries with helmet experiment
Arizona Cardinals defensive end J.J. Watt not fan of the new league-mandated Guardian Caps on helmets
Why are players wearing padded helmets at NFL training camps?
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL Training Camp: 12 photos of players wearing the new Guardian Caps
Bill Belichick downplays competitiveness of training camp practices without full pads - CBS Boston