The Titans had three players and five other personnel test positive for COVID-19. Both the Titans and the Vikings (yesterday's opponent) are suspending in-person activities until they can test everyone again. A league source has said "We are shutting down Tennessee until Saturday." Unknown at this point what this will mean for Sunday's games, Tennessee-Pittsburgh and Minnesota-Houston. More news to come.
UPDATE: The NFL announced Wednesday morning that the Tennessee-Pittsburgh game will be postponed until either Monday or Tuesday, still to be determined. One additional Tennessee player has tested positive.
FURTHER UPDATE: After another Tennessee player tested positive on Wednesday, the NFL has announced that the game will not be played in Week 4 and will be moved to later in the season. No other specifics yet on how that will work.
EVEN FURTHER UPDATE: On Friday morning, the NFL officially announced that this game will be rescheduled for Week 7, and the Ravens-Steelers game originally scheduled in Week 7 will now take place in Week 8. The league got lucky that an easy schedule shift was available because of the bye-week scheduling. Next time a team has an outbreak, rescheduling may not be so easy.