Boston Celtics center Robert Williams III underwent surgery for a torn meniscus in his left knee Wednesday morning and is expected to miss four to six weeks.  Williams could potentially return to the Celtics in the second round of the playoffs, if the team advances past the first round.

The 6-foot-8, 237-pound Williams injured the knee during the Celtics win over the Minnesota Timberwolves on Sunday in Boston. The four-year veteran started 61 regular-season games, and is averaging career highs, with 10 points, 9.6 rebounds, 2.2 blocks, 2.0 assists and 0.9 steals per game this season.

The Celtics (47-29) hold the No. 3 seed in the current Eastern Conference standings. Six games remain in the NBA’s regular season. The Miami Heat (48-28) are the No. 1 seed in the Eastern Conference, followed by the Milwaukee Bucks (47-28).

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