Jaylen Brown contracted COVID-19, dealing the Boston Celtics a big blow in their preparations for the 2021-22 season.

Brown tested positive for the dreaded disease and is now quarantining. According to the Celtics’ latest update, though, the 24-year-old is asymptomatic. No further details on how and when Brown got the virus were provided.

Live and breathe the NBA?

🚨 Get viral NBA graphics, memes, rumors and trending news delivered right to your inbox with the Clutch Newsletter.

Jaylen Brown actually still played during the Celtics’ first  preseason game against the Orlando Magic on Monday, leading the franchise to a close 98-97 win. He scored a game-high 25 points on top of four rebounds and three assists, all while shooting 50 percent from the field.

It remains to be seen how long Brown will be out with the positive COVID-19 test, but it is worth noting that the league’s previous rules require players who got the virus to quarantine for “10 days or more” or produce two negative tests in a span of 24 hours before being  allowed to return. It is unknown whether the Celtics leader is vaccinated or not.

With the Celtics set to open the season on October 20, it looks like Brown will still be able to return in time to face the New York Knicks at Madison Square Garden. However, it is likely that the Georgia native will miss the rest of Boston’s preseason games against the Toronto Raptors (October 9) and Magic (October 19).