MEMPHIS — Well, that trade hasn’t worked out. At least not yet.

Cam Reddish, acquired in January by the Knicks for a first-round pick, is out for the rest of the season after tests uncovered a separated shoulder, the team announced Thursday.

Reddish is still under contract through next season but his stint in New York hasn’t gotten off the ground. He played just 15 games and averaged six points before his injury Monday in Sacramento, where he was upended during a block attempt by Kings guard Davion Mitchell and fell hard onto the court.

Reddish tried to break the fall with his arm and officially sustained a “right shoulder AC joint injury,” according to the Knicks.

Team president Leon Rose traded a protected first-round pick and Kevin Knox to the Hawks for Reddish. If the Knicks don’t sign him to a contract extension, Reddish, 22, the 10th overall pick in 2019, will become a restricted free agent in 2022.

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