NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Guardian Caps debut at training camps throughout NFL
High school football teams go soft in the fight against brain injuries
Guardian Caps The Rundown // Guardian Sports
Coverage of the NFL in Guardian Caps
What are Guardian Caps? NFL's latest padded helmets for added safety
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Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp - Sports Illustrated
The story behind those soft-shell puffy Guardian Caps players have been wearing
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