Guardian Caps debut at training camps throughout NFL
NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More
NFL hopes to reduce head injuries with helmet experiment
What is a Guardian Cap? Meet the NFL's newest safety measure
Truth About Guardian Caps
NFL players wear Guardian Caps to reduce head trauma during training camp
If a player wanted to wear a Guardian Cap during a game, the league would prohibit it
NFL hopes to reduce head injuries with helmet experiment
NFL hopes to reduce head injuries with helmet experiment
NFL on FOX - Guardian caps have significantly helped with the players health and safety during training camp this season. 🙏
Here's why some Patriots players are wearing caps over their helmets during training camp
Giants react to NFL's new 'Guardian Caps' at training camps - Big Blue View
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries
EXPLAINER: NFL using helmet caps for player safety, research - The San Diego Union-Tribune