Boston Celtics center Robert Williams underwent successful arthroscopic surgery on his left knee Thursday and is expected to miss 8-12 weeks as he recovers.

Celtics center Robert Williams told reporters that he’s now “day-to-day” to return after he had knee surgery in September that’s kept him sidelined for the entire season up to this point.

Celtics big man Robert Williams should return to the team this week. It could be a pivotal moment for a team that excels on both ends.

Robert Williams won't be hitting the floor for the Celtics for a few more months. But the big man was pretty happy to be back with his teammates at Monday's Media Day in Canton.

The Boston Celtics will be getting a key contributor back for Game 7 against the Milwaukee Bucks on Sunday afternoon, as center Robert Williams is available for the game and will come off the ...

Robert Williams was a crucial contributor during the season, and he hasn't looked right yet. That means the Celtics have another gear. "We feel confident that he'll be ready by next game." ...

Robert Williams suffered a hamstring injury in the Celtics' loss to the Nets, causing him to miss his 37th game of the season on Sunday. Read more on Boston.com.

Following a partial left knee meniscectomy, Robert Williams received a 4-6 week timetable for his return. There's optimism he'll be available on the earlier end of that spectrum.

BOSTON -- Robert Williams played only 19 minutes in the Celtics' 102-82 win over the Heat in Game 4 on Monday night. But he made a huge impact in that short amount of time. That is no surprise ...

Celtics big man Robert Williams came back to training camp with more muscle and a sense of urgency due to his new contract extension. "Just as much as confidence, it’s motivation." ...