The Yankees' post-All-Star break opener against the Boston Red Sox on Thursday night was postponed because of positive COVID-19 tests within New York's organization.

Major League Baseball said the postponement was to allow for more testing and contact tracing.

New York was among the first major league teams to reach the 85% vaccination threshold to lessen coronavirus protocols such as dropping mask use in dugouts and bullpens.

The Yankees placed left-handers Nestor Cortes and Wandy Peralta on the COVID-19 injured list Thursday around midday.

Yankees GM Brian Cashman later updated the situation to say pitcher Jonathan Loáisiga also tested positive.