EXPLAINER: NFL using helmet caps for player safety, research
NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
With a little imagination NFL's new Guardian Caps take on different look in Cleveland: Crowquill
Guardian Caps Guardian Sports
Packers Coach Matt LaFleur Questions Protective Guardian Cap - Sports Illustrated Green Bay Packers News, Analysis and More
College football safety gets shaped by research, including possible head-hit counts
What Are the Experts Saying About Guardian Caps – The Concussion Blog
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Nebraska is imposing a 7-day wait for trans youth to start gender-affirming medications