The Cleveland Guardians and Chicago White Sox were scheduled to play in an afternoon game on Wednesday, but it seems plans have changed. It was initially reported that Guardians’ manager Terry Francona would be unavailable for the game after testing positive for COVID-19, but now reports indicate the game has been postponed altogether by MLB after multiple positive tests emerged from within the Guardians’ organization, per Zack Meisel.

MLB issued a statement regarding the cancelation in which it revealed that the Guardians had multiple positive tests on Wednesday, and the game will be postponed in order for the team to do further testing of its players and contact tracing. According to Mandy Bell, Francona and Guardians bench coach DeMarlo Hale tested positive, among others.

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The game has yet to be re-scheduled, though MLB said it will provide an update in that regard when one becomes available.

The Guardians-White Sox postponement is the first time this season that a COVID-19 outbreak has caused an MLB game to be shelved. Other teams in the league have been hit with positive tests and sent players to the COVID-IL, but it seems the Guardians’ outbreak is a bit more concerning, prompting the league to postpone the game.

The Guardians and White Sox are both sitting at .500 on the year, tied for second in the AL Central behind the Minnesota Twins. Wednesday’s game would have seen one team vault past the other in the standings, but they’ll have to remain tied for at least another day following the cancellation.