Here are the mouth shields NFL players are testing as a COVID-19 precaution
NFL, Oakley create helmet face shields to protect players, NFL
NFL, Oakley Come Up With Face Shields To Protect Players
NFL trying to make changes to facemasks to protect players from Covid-19 spread - DraftKings Network
Experts warn of second coronavirus wave in Dallas, Houston, Alabama and parts of Florida - The Washington Post
COVID-19 pandemic in California - Wikipedia
Only three players wore the NFL's Oakley mouth shield in Week 1: source - The Athletic
NBA takes first step to return, guidelines expected June 1 - The Boston Globe
NFL, Oakley Come Up With Face Shields To Protect Players