Late July - Training camps open.
Aug. 9-13 - Preseason openers.
Sept. 5 - Regular-season opener.
Sept. 9-10 - First full regular-season weekend.
Major updates to the NFL's COVID-19 protocols were sent to all clubs on Monday in a memo obtained by NFL Network's Tom Pelissero. Among the updates are a mandate for players to wear face coverings on the sideline if they are not wearing a helmet or entering a game with those who do not subject to discipline.