The Guardian helmet cap touches down in Columbus
Aaron Rodgers' injury deepens Jets' unparalleled run of misery
Built By Data: NFL Helmet Innovation
Helmet Maker Rounds Out Football Portfolio With New Headgear
University of Wisconsin football players downplay warnings while proof of brain injury — even from small hits — piles up - Wisconsin Watch
Patriots fan dies at game vs. Dolphins: Dale Mooney was punched twice in head after 'mutual combat'
Watch Super Bowl 100: How the NFL Can Survive the Concussion Epidemic, SB 100
Brain Injuries And The NFL: A Fan's 5 Stages Of Grief : NPR
VERIFY: CTE risk higher in kids under 14 in tackle football
New helmets could help doctors 'see' concussions on football
Concussions: Can cap keep football players' heads in game? – Orange County Register
Florio] Joe Burrow, who has no official history of concussions but who has admitted playing with head injuries, switches to the new position-specific helmet aimed at better protecting the brain. : r/nfl
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Kids and Concussions: The effects of head injuries in young athletes
This Helmet Will Save Football. Actually, Probably Not. - The New York Times