NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
The story behind those soft-shell puffy Guardian Caps players have been wearing
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Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Why Chiefs players are wearing special foam caps over helmets
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
The story behind those soft-shell puffy Guardian Caps players have been wearing
Puffy Guardian Caps Could Reduce NFL Player Concussions
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Sports Archives - The Atavist Magazine