Sources -- NFL, NFLPA investigating whether Titans violated coronavirus protocols - ESPN
Fourth Titans Player Tests Positive for COVID-19
Texans caught in fallout from NFL's first COVID-19 outbreak
Tennessee Titans have eight positive coronavirus tests - The Washington Post
NFL postpones Steelers-Titans after 2 more positive tests
N.F.L.'s New Two-Minute Drill: Juggling a Coronavirus Outbreak - The New York Times
NFL Postpones 1st Game Due To COVID-19 Pandemic Following Tennessee Titans Outbreak
Coronavirus: Steelers-Titans game rescheduled for Week 7 - Los Angeles Times
Tennessee Titans: Two more Covid positive tests reported, taking total to 13 confirmed cases, NFL News