NFL: Concussions dropped by more than 50% among players who wore Guardian Caps during summer
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
What is the NFL Guardian Cap? Will it do anything to reduce concussion? — Dr. Mark Heisig
2022-2023 Prosper ISD High School Student Handbook by Prosper Independent School District - Issuu
Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
Guardian Caps added to help reduce football concussions - The Witmarsum
Guardian Caps are the latest effort to address CTE, football concussion concerns
BKHS Parent & Student Handbook 2022-23 by Bishop Kenny High School - Issuu
Guardian Caps are the latest effort to address CTE, football concussion concerns
The Coat of Arms Added Protection or False Security: Football Tests New Guardian Caps to Prevent Concussions