Former NBA guard Jarrett Jack has sustained a torn ACL and lateral meniscus in his left knee, a crushing blow for a veteran seeking a comeback in the league, Ira Winderman of the Sun Sentinel tweets. Jack, who also sprained his MCL, has a surgical procedure scheduled for April 1.

Jack had been playing with the Sioux Falls Skyforce — G League affiliate of the Heat. He suffered the injuries in last Saturday’s contest against Rio Grande, exiting the game in the third quarter with a noticeable limp during his lone appearance with the team.