Coverage of the NFL in Guardian Caps
New gear allows safer practice for gridiron Badgers - Daily News
NFL: Concussions dropped more than 50% with Guardian Caps
NFL concussions Guardian Cap - TSN.ca
NYSportsJournalism.com - NFL Guardian (Caps) Of The Preseason
NFL: Concussions drop 50% with Guardian Caps : r/nfl
NFL stars could wear motorcycle-style helmets as the sport
NFL garners groundbreaking results after 'Guardian Caps' data
New devices, practice habits aim to curb concussions in high
NFL players experimenting with 'Guardian Caps' to prevent head
NFL announces more steps to reduce head injuries
Guardian Cap Results: “Exceeded Our Expectations”
NFL hopes to reduce head injuries with helmet experiment
Guardian Caps: Why some NFL players are wearing them in training
NFL's handling of concussions questioned after Tua's injury