More Guardian Caps, And '0' On The Field
Kiski Area football adds Guardian Caps for extra level of safety during practice
Guardian cap' to prevent head injuries mandated for practices, CFL says
XFL opener: DC Defenders slay Seattle Dragons behind 39-yard trick play, XFL
Guardian Caps Guardian Sports
Padded helmet cover shows little protection for football players - Scope
Guardian Cap Debuts at Training Camps League-wide
Concussions: Can cap keep football players' heads in game? – Orange County Register
Why Alabama football players are wearing padded helmets in practice
KTTC In-Depth: Guardian Caps in high school football
NFL Health and Safety Fact Sheet
From Purdy to Rodgers: the most important people in the new NFL season, NFL
College football safety gets shaped by research, including possible head-hit counts