Both Joseph and Varnado were working on non-guaranteed deals, and the Celtics had until Monday at 5 p.m. to guarantee their contracts. In electing to go in a different direction, Boston opens up two roster spots, which it likely will look to fill as other teams waive players.
Varnado's departure isn't overly surprising, as the Celtics signed him out of the NBA Development League on Dec. 24 primarily to help bolster the frontcourt in the wake of Chris Wilcox's thumb injury.
Joseph being waived is a bit more surprising, as Boston had been high on the former Syracuse forward, who was selected with the 51st pick in last year's draft. Joseph had spent the majority of the season with the D-League's Maine Red Claws, where he averaged 17.7 points and 5.3 rebounds in 10 games.
Update: The Celtics confirmed the roster moves on on Sunday evening.