NFL says Steelers-Titans game won't be played in Week 4 after two more positive coronavirus tests - ESPN
MMQB: How Week 4 tested the NFL's COVID-19 protocols - Sports Illustrated
NFL postpones first game amid pandemic
N.F.L. Indefinitely Postpones Steelers-Titans Game After New Virus Cases - The New York Times
NFL postpones Pittsburgh-Tennessee game after 9 in Titans organization test positive for COVID-19
Steelers-Titans NFL game postponed due to Covid-19 positive tests
NFL postpones Ravens-Steelers Thanksgiving game amid COVID-19 concerns
New Tennessee Titans positive test raises total to 23 cases
Tennessee Titans Game Postponed Indefinitely as Team's Covid-19 Case Count Rises - WSJ