According to Sean Deveney of Heavy.com, Boston Celtics center Robert Williams is expected to undergo arthroscopic knee surgery and will miss all of training camp and likely the beginning of the regular season. Deveney mentioned that the recovery timeline would be around 4-6 weeks.
However, Adrian Wojnarowski of ESPN also reported on the story, stating that the timetable for recovery will be roughly 6-8 weeks. A four-week recovery time would see the big man return at the very start of the regular season, six weeks would see him miss the first two weeks, and eight weeks would be the entire first month.