Jared Sullinger did not practice Thursday because of back spasms, and (Celtics coach Doc) Rivers said he is 50-50 to play Friday against the Orlando Magic. Sullinger apparently slipped in the draft because of back issues but has played in the team’s first 45 games.

Rivers said Sullinger began experiencing back discomfort two weeks ago, but the coach doesn’t expect it will be a major injury.

“I’m not that concerned. Can his miss games here or there? He may, but it’s not anything [long-term] or anything like that.”

via Gary Washburn of The Boston Globe