New York Yankees pitcher Domingo German will remain on administrative leave throughout the playoffs as Major League Baseball continues to investigate a domestic violence allegation against him, MLB said Wednesday.

In a joint statement with the Major League Baseball Players Association, officials said German’s leave would continue “through the conclusion of the 2019 World Series.”

German’s absence is a blow to the Yankees’ hopes of claiming a 28th World Series crown. The club has said in recent days it was preparing for the playoffs as if the 27-year-old Dominican right-hander, who posted an 18-4 record with a 4.03 earned run average, would not be available.

MLB has given no details of what actions by German led to the decision to place the player on administrative leave on 19September.

At the time, the Yankees said they “fully support all measures being undertaken by the commissioner’s office pursuant to the policy on domestic violence.”

The Yankees have clinched the American League East division title and went into their Wednesday game against the Tampa Bay Rays with a record of 102-56, just behind the Houston Astros for the best record in the major leagues.