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Robert Williams undergoes PRP injection in his left knee on Monday

Milwaukee Bucks v Boston Celtics - Game Two

BOSTON, MASSACHUSETTS - MAY 03: Robert Williams III #44 of the Boston Celtics looks on before Game Two of the Eastern Conference Semifinals at TD Garden on May 03, 2022 in Boston, Massachusetts. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Maddie Meyer/Getty Images)

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Robert Williams underwent a PRP injection in his left knee on Monday, according to Shams Charania of The Athletic.

Williams had an arthroscopic procedure on his knee in late September, and his original timeline was an 8-12 week recovery, putting him back in the court in late December at the earliest.

Now, the hope is still that Williams will return in December or January, but there’s also a chance that it’s later than that.

Williams originally tore his meniscus on March 30th, but he ended up playing limited minutes during Boston’s playoff run. He was crucial to the Celtics’ defensive success last season, averaging 10.0 points, 9.6 rebounds and 2.2 blocks, which was second in the NBA.

When he eventually returns to the court, Boston will likely limit his minutes, and it’s unlikely that he plays in any back-to-backs. They’ll rely on Grant Williams and Al Horford in the frontcourt, like they did in the playoffs last season. However, Joe Mazzulla opted to start Derrick White over Grant Williams in the preseason. Either way, Robert Williams may not fully return to the court until closer to the playoffs.