Marlins manager Don Mattingly tests positive for COVID-19
Vaccinated Washington Nationals Player Tests Positive for COVID
MLB gets a deal done, as Blackmon tests positive for COVID-19 – The Durango Herald
CDC: people who test positive for Covid with no symptoms should isolate just five days, Coronavirus
Novak Djokovic to Play at U.S. Open After COVID-19 Policy Change – SportsTravel
MLB Opening Day: 5 Washington Nationals test positive for COVID-19
Coronavirus: Seattle Sounders FC support staff member tests positive
COVID-19 concerns postpone Nationals-Mets opener in D.C. - The Boston Globe
Nationals Opening Day Game Postponed After Positive COVID Test – NBC4 Washington
Yankees minor-leaguer first MLB-affiliated player to test positive for COVID -19
Nationals' Trea Turner tests positive for COVID-19, exits game - NBC Sports