Klay Thompson Diagnosed with Torn Achilles, Will Miss Entire NBA Season

NBA superstar Klay Thompson has been diagnosed with a torn right Achilles tendon -- and will miss the entire 2020-21 season.

It's the worst possible news the Golden State Warriors could have received about the Splash Brother after he went down with an injury during a pickup game Wednesday in Downtown L.A. with other NBA players.

The team initially feared the injury could be severe ... a fear that was realized Thursday after the test results came back.

The injury usually takes 9-to-12 months for recovery -- though Kobe Bryant famously returned after 8 months when he suffered the same injury back in 2013.

What's worse for Klay is that he was busting his ass over the past year to return from a torn ACL in his left knee -- an injury he suffered during Game 6 of the 2019 NBA Finals, which required him to miss all of last season.

It's a major blow to the Warriors ... who posted the worst record in the league last season without their 2 biggest stars -- Thompson and Stephen Curry, who was recovering from a broken hand.

Thompson is easily one of the best shooters in the game -- with a career average of 19.5 points on 45% shooting ... including 41% from 3-point range.