NFL medical director asks for patience with DeVante Parker concussion investigation: 'Let's let all the facts emerge' - The Boston Globe
NFL CMO Dr. Sills on Guardian Caps Mandate >> Guardian Sports
Coverage of the NFL in Guardian Caps
NFL's handling of concussions questioned after Tua Tagovailoa's injury – News-Herald
Raiders, other NFL teams wear Guardian Caps for head safety, Raiders News
Guardian Caps Guardian Sports
Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp - Sports Illustrated
The 2018 Injury Reduction Plan: Initiatives to Advance Player Health and Safety
Patriots, rest of NFL wearing cushioned helmet caps at training camp, per new mandate - CBS Boston
Coverage of the NFL in Guardian Caps
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
Concussions Dropped More Than 50 Percent for Players Who Wore Guardian Caps, NFL Says, News, Scores, Highlights, Stats, and Rumors
FMIA: Steelers Coach Mike Tomlin Welcomes Training Camp Tour To Latrobe With 3 Words—Bring It On - NBC Sports
Head case: Batting helmet's development began in Pittsburgh