The Washington Nationals postponed their Wednesday night game against the Philadelphia Phillies after a dozen players and staff members tested positive for the coronavirus.
In a statement, the Nationals said the game was postponed to “allow for continued testing and contact tracing involving members of the Nationals organization.”
The wave of infections came after a Nationals shortstop, Trea Turner, left during the first inning of Tuesday night’s game against the Phillies after testing positive for the virus.
Dave Martinez, manager of the Nationals, told reporters that four players, including Turner, and eight staff members were among the positive cases, ESPN reported.
Mr. Martinez also told reporters he believed that one of the dozen cases was a person who is unvaccinated, according to ESPN.
The Nationals are among many M.L.B. teams that have been able to loosen safety protocols after reaching the 85 percent vaccination threshold set by the league. Players and coaches on these teams do not have to wear masks in the dugout or bullpen during games, can work out without masks in weight rooms and are subject to less frequent testing for the virus.
The Nationals had an outbreak at the beginning of the season that forced a series against the New York Mets to be postponed in April after four Nationals players and a staff member tested positive.
This month, after several New York Yankees players tested positive, that team had to postpone its July 15 game against the Boston Red Sox.
The Nationals and Phillies are set to make up the Wednesday game as part of a doubleheader on Thursday.