The Boston Celtics already were shorthanded going into their game against the Los Angeles Clippers on Friday night.
They went down one more player in the third quarter.
The C's announced Daniel Theis would miss the remainder of the contest with right knee soreness.
Jaylen Brown also is dealing with soreness in his knee, but head coach Brad Stevens deemed the guard as "day-to-day."
Theis has been valuable to Boston this season, and losing him for any extended period of time certainly wouldn't be good news.
