The number of positive coronavirus cases for the St. Louis Cardinals has grown to 13, meaning their four-game series against the Detroit Tigers has been postponed.
Major League Baseball (MLB) revealed on Monday that the Cardinals have had seven players and six staff members test positive for COVID-19 in the last week.
MLB had already postponed their weekend series against the Brewers in Milwaukee after it was announced on Friday that two members of the St. Louis organisation had been diagnosed with the virus.
The Cardinals have not left Milwaukee since arriving following their series against the Minnesota Twins; they will remain there with the hope of being able to resume their season against the Chicago Cubs on Friday.
"The club, which has been in quarantine since Thursday, will stay in Milwaukee and their personnel will continue to be tested daily," MLB said in a statement.
The Cardinals, who have played only five games, are the second MLB team to have suffered a coronavirus outbreak, following on from the Miami Marlins.
At least 21 members of the Marlins' traveling party have contracted the virus, halting their season after just three games.
Idle since July 26, the Marlins are scheduled to resume playing against the Baltimore Orioles on Tuesday.