Horrible news for the Nationals … phenom outfielder Juan Soto has tested positive for COVID-19 — and he’s now out for the foreseeable future.

Of course, the Nats are opening the MLB season against the Yankees in just a few hours … and Juan was expected to be the team’s best hitter.

FYI, Soto is just 21 years old … but he hit 34 home runs and logged 110 RBI last season, helping lead the team to its first-ever World Series title.

But, Juan came down with a positive diagnosis for coronavirus Thursday … and is now expected to miss at least the next two weeks — a huge deal considering the season is just 60 games long.

Soto had already missed a huge portion of the Nats’ camp this month … after he had to self-isolate after coming into contact with somebody who had the virus.

The good news … Nats general manager Mike Rizzo says Juan is asymptomatic — but the MLB superstar will still need two negative tests in order to return to the lineup.