With the new salary cap you have to be stupid to waive a rookie contract unless they violated some sort of rules ...
While I dont think Young will crack any lineups anytime soon hes still only 20 years old.. Best move is continue to grrom him ... The Celtics gain NOTHING by cutting him...
The Celtics gain a roster spot. If the Celtics have Horford, Johnson, Olynyk, Jerebko, Crowder, Brown, Bradley, Smart, Thomas. Rozier, Mickey, and Hunter, that is twelve players. Pencil in Young, Jackson, and Bentil for the last three roster spots. If the Celtics sign a free agent, whether Sullinger or someone from another team, or if they bring in Zizic now, they have to open up a roster spot. Trying to trade Young, but waiving him if necessary, seems better than giving up on one of the second rounders, but you don't have to do that until the end of preseason.
Bringing in a solid post defender who can be the 4th or 5th big would probably be a better use of that roster spot than Young.