NFL CMO Dr. Allen Sills explains importance of mandated guardian
Here's why some Patriots players are wearing caps over their
Why are NFL players wearing padding on helmets at training camp?
NFL introduces Guardian Caps across league to limit number of
Steelers debut new, safer helmets for off-season training
NFL mandates use of Guardian Caps for training camp in 2022
Guardian cap' to prevent head injuries mandated for practices, CFL
NFL's use of Guardian padded helmet caps in camp draws support and
NFL hopes to reduce head injuries with helmet experiment
NFL players beginning to adopt protective Guardian Caps over