Young (knee) has gone 1-for-6 with a walk and two strikeouts in two games since beginning a rehab assignment with Single-A St. Lucie on Friday.
Young last played April 12 before needing surgery to repair a minor meniscus tear in the left knee. Per Tim Britton of The Athletic, the Mets don't have a timeline for the veteran outfielder's return, but the additions of MJ Melendez and top prospect A.J. Ewing to the big-league lineup in his absence could make it tough for Young to regain a spot once he's cleared.