Shell game: Player safety looming concern as new season approaches, Local Sports
What are Guardian Caps? NFL's latest padded helmets for added safety
What are Guardian Caps? NFL's latest padded helmets for added safety
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Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Damar Hamlin and Sam Peltzman: Where Football Meets Economics - Econlib
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Eagles Training Camp Practice Notes
NFL hopes to reduce head injuries with helmet experiment
What Are the Experts Saying About Guardian Caps – The Concussion Blog
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