NFL hires Dr. Allen Sills as full-time chief medical officer
NFL drafts 3 Mississippi docs for medical team
NFL Guardian Caps: How Do They Work? – NBC 6 South Florida
NFL Chief Medical Officer Says Guardian Caps Not Coming To Games
The toughest opponents in the NFL this season? Unvaccinated
Robert Saleh expresses concern about Guardian Caps - NBC Sports
Dr. Allen Sills: Sick NFL Players Must Isolate Even with Negative
Our sport can be safe and exciting': NFL points the way for
NFL Presents: League-wide Guardian Cap Use to Reduce Head Impacts
NFL hopes to reduce head injuries with helmet experiment