Brad Stevens said James Young "has some work to do."
Brad Stevens has no idea when Vitor Faverani (knee) might return.
Marcus Smart (ankle) is hoping to return to practice on Wednesday.
Jeff Green doesn't want to be traded by the Celtics.
Kelly Olynyk had a rough night vs. Robin Lopez and the Blazers, going scoreless with eight rebounds, one assist and three turnovers.
Evan Turner provided a spark for Boston's second unit with 10 points, five rebounds, three assists and one steal in just 14 minutes.
Jared Sullinger set season-highs on Sunday for both field goals attempted (22) and 3-pointers attempted (nine), though he finished with only 19 points in a loss to Portland.
Celtics' head coach Brad Stevens said that Vitor Faverani (knee) may be back by the beginning of January, but would not commit to an official date.
Marcus Smart (ankle) is hopeful he'll be able to return to practice next week, but his status for Friday's game vs. the Bulls remains unknown.
The Celtics have re-assigned rookie James Young to their D-League affiliate.
Vitor Faverani (knee surgery) still has no timetable for his return.
Jeff Green said that his frustration level was at an "all-time high" after Friday's loss to Memphis.
Marcus Smart (ankle) will not play on Sunday against the Blazers.
Vitor Faverani (knee) has only been doing work on a bike and in the pool.
Jared Sullinger scored 13 points on 5-of-10 shooting (including three treys) with six rebounds, one assist, one steal and three blocks in Friday's loss to the Grizzlies.