Major League Baseball has cancelled Sunday's game between the Houston Astros and the Oakland Athletics after a member of the A's organisation tested positive for coronavirus.
The match at Minute Maid Park was called off on the day of the game and the A's travelling party have gone into self-isolation.
An A's statement said: "The Oakland A's learned today that a member of the organisation has tested positive for COVID-19 and Major League Baseball has postponed today's game in Houston at Minute Maid Park.
"The team conducted testing and contact tracing for the entire traveling party this morning and will self-isolate in Houston with recommended safety precautions in place.
"The A's organisation and Major League Baseball will continue to provide updates as necessary."
A series finale between the A's and the Texas Rangers was also called off this week after Oakland decided not to play in protest against racial injustice in the United States.
Three MLB games were postponed on Wednesday as players protested against the shooting of Jacob Blake, a 29-year-old black man, by police in Wisconsin last Sunday.
A few hours prior to the scheduled start of Thursday's game between the A's and the Rangers, the Oakland players chose to postpone the encounter.