Robert Williams had knee surgery last March and raced back for the postseason, playing through a sore knee that was swelling up during the NBA Finals — “Taking it day by day, step by step, getting all the treatment I can, throwing everything I can at my knee to make sure I’m running” — and he played well. It was hoped an offseason of rest would have one of the favorites to win Defensive Player of the Year ready for the start of the Celtics’ season.
But Williams is now out for training camp and possibly the start of the season because he needs his knee scoped, reports Adrian Wojnarowski of ESPN.
Boston Celtics center Robert Williams is undergoing arthroscopic procedure on his left knee and is expected to need 4-to-6 weeks for recovery, sources tell ESPN. Williams had meniscus surgery in March and played through the playoffs
— Adrian Wojnarowski (@wojespn) September 20, 2022
The surgery is planned for this week. The Celtics open the season on Oct. 18 at home against Joel Embiid and the Philadelphia 76ers. While it’s possible Williams could return for that game, the Celtics would be wise not to rush back a critical part of their defense for an October game when what really matters to this team starts in April. Boston learned the hard way last season about what happens when players wear down during the postseason, there will be a focus on having the core Celtics players fresh for this playoff run.
Williams averaged 10 points and 9.6 rebounds a game last season, but his biggest contribution was on the defensive end — the Celtics had the best defense in the NBA last season, and that D was 3.7 points per 100 possessions better when Williams was on the court last season. In the playoffs, the Celtics’ defense was 6.4 points per 100 better when Williams protected the rim — sore knee and all.
With the six-week timeline, if things go well, Williams should be ready to play around at the start of November.