Apologies if I missed this, but this seems to be a pretty good article including a timeline on the Titans outbreak and some of the issues around timing of testing arising from it:   https://www.espn.com/nfl/story/_/id/30002250/tennessee-titans-covid-19-outbreak-know-positive-coronavirus-tests-nfl-games-postponed   Key points: -48 close contacts were identified, some presumably using Kinexon Proximity Recording tracking devices all players and employees wear during team a