AP Sources: NFL discussed cancellations due to COVID-19
NFL discussed cancellations due to COVID-19 outbreaks on teams: reports
Eagles-Washington postponed due to COVID-19 cases on WFT; game will be played Tuesday
COVID-19 Absences Affect NFL Outcomes - Johns Hopkins Coronavirus Resource Center
Philadelphia Eagles' Jeffrey Lurie, Jim Schwartz optimistic about NFL following COVID-19 protocols
COVID-19 pandemic in the United States - Wikipedia
The NFL Warns Teams Will Forfeit Games And Players Won't Be Paid In COVID Outbreaks : NPR
Sports postponements and cancellations over Covid-19
Three NFL games moved due to COVID-19 outbreaks
Sources: NFL Discussed Cancellations Due to COVID-19 – NBC Los Angeles
Football game cancellations rampant among Arizona high schools as COVID-19 cases rise
The NFL Needs to Finalize Its COVID-19 Plans—and Soon - The Ringer
COVID-19 remains biggest opponent for Big Ten football teams
COVID outbreak, injuries force Texas A&M out of Gator Bowl
COVID devastated NFL player's family, so he shares message on vaccine