Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Broncos Camp Notebook: Russell Wilson pleased with 'great first day,' offense's progression as training camp begins
Have you seen the strange helmets Cowboys players are wearing in camp? Here's the story
Cowboys wearing soft-shell helmets in practice as part of NFL mandate
Micah Parsons shows up at Dallas Cowboys OTAs ready for a new challenge, going from 'great to elite'
Football Guardian Cap draws mixed reviews from players, experts for safety effectiveness - The Daily Tar Heel
NFL hopes to reduce head injuries with 'goofy' helmet experiment
5 things we learned from Cowboys practice: Jalen Tolbert shines, Dalton Schultz returns
Minicamp Notes: Rookies Shine In All Three Phases
Anybody know what those things on their helmets are? : r/cowboys
Broncos Training Camp Day 1 report: Energy starts with Russell Wilson - Denver Sports