Red Sox, Yankees to play Friday amid additional COVID-19 positive tests
Don Mattingly tests positive for COVID-19
Sources: At least five New York Yankees coaches test positive for COVID-19
Yankees minor leaguer tests positive for coronavirus, team quarantines all MiLB players for two weeks
SportsReport: Yankees, Red Sox Postponed By COVID Cases; Beal To Miss Olympics
COVID-19 Still Threatens The MLB, NFL And Olympics : NPR
Yankees Add Aaron Judge and Two Others to Covid-19 Injured List - The New York Times
Washington Nationals' Juan Soto out after testing positive for COVID-19
Reopen NYC: New York Yankees, Mets and rest of MLB experience first COVID-era exhibitions - ABC7 New York