Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NYSportsJournalism.com - NFL Guardian (Caps) Of The Preseason Galaxy - Safety Impact: NFL Expands Presence As Guardian (Caps) Of The Preseason Galaxy
Guardian cap' to prevent head injuries mandated for practices, CFL says
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL to expand use of Guardian Caps in preseason, regular season practices - NBC Sports
NFL says positions wearing Guardian Caps saw 52% decrease in concussions - NBC Sports
NFL Releases Concussion Data After Use of 'Guardian Caps' During Offseason - Sports Illustrated
NFL hopes to reduce head injuries with helmet experiment – The Morning Call
Guardian Caps Exceed NFL's Expectations - Guardian Sports
7 Patriots takeaways: Nelson Agholor continues to impress as joint practices with Panthers loom
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
Coverage of the NFL in Guardian Caps
Guardian Cap Results: “Exceeded Our Expectations”