Sources -- NFL, NFLPA investigating whether Titans violated coronavirus protocols - ESPN
Patriots-Chiefs Game Postponed After Positive Coronavirus Tests on Both Teams - The New York Times
Postponing Patriots-Broncos game was necessary to avoid an NFL player revolt - The Boston Globe
NFL postpones Chiefs game against Patriots following positive coronavirus tests on both teams, FOX 4 Kansas City WDAF-TV
Cam Newton tests positive, NFL doesn't want repeat of Titans outbreak - Sports Illustrated
NFL's Covid outbreak postpones Patriots-Chiefs — but it could be about to get worse
Chiefs-Patriots postponement reflects NFL season on brink
AP Source: Pats-Chiefs All Clear; No Positives For Titans
The NFL Learned the Same Lesson as Washington This Week - WSJ