Chiefs All-Pro safety Mathieu out of COVID-19 protocol - KAKE
NFL: Chiefs lean on defense to beat Patriots in COVID-19-delayed game; Packers beat Falcons - Los Angeles Times
Kansas City Chiefs place DB Tyrann Mathieu on Reserve/COVID-19 list
Tyrann Mathieu activated from COVID-19 list ahead of Week 1, is considered a game-time decision
Tyrann Mathieu expecting to elevate Chiefs' defense in his anticipated return against Ravens - The Athletic
Patriots-Chiefs game rescheduled for Monday or Tuesday in Kansas City – Boston Herald
Tyrann Mathieu on his return to New Orleans, leaving the Chiefs - Sports Illustrated
Tyrann Mathieu tests positive for COVID-19 Kansas City Chiefs
Tyrann Mathieu's Botched Deflection Against 49ers
New England Patriots 10-26 Kansas City Chiefs: Patrick Mahomes leads Chiefs to history-making 4-0 start, NFL News
2023 Kansas City Chiefs Media Guide by Kansas City Chiefs - Issuu