Tyrann Mathieu placed on KC Chiefs reserve/COVID list
Chiefs safety Tyrann Mathieu tests positive for COVID-19
Chiefs All-Pro safety Mathieu out of COVID-19 protocol
Chiefs' Tyreek Hill among 21 NFL players added to COVID-19 list
Patriots-Chiefs game rescheduled for Monday or Tuesday in Kansas City – Boston Herald
Chiefs place DT Chris Jones in COVID-19 protocol
Reid: Chiefs' coach says he decided to sit Mathieu, Clark
Chiefs still missing Mathieu to COVID-19 as Week 1 work begins
Kansas City Chiefs place DB Tyrann Mathieu on Reserve/COVID-19 list
Chiefs, Bucs ride (mostly) COVID-clear season to Super Bowl – The Denver Post
Super Bowl-bound Chiefs place two players on COVID list, Super Bowl, Sports
Chiefs add Tyreek Hill, others to growing COVID-19 list
Chiefs safety Tyrann Mathieu tests positive for COVID-19 - The San Diego Union-Tribune
Chiefs' Mathieu remains in COVID-19 protocol ahead of opener Ohio & Great Lakes News - Bally Sports