Boston Celtics

Dec 19, 2018; Boston, MA: Boston Celtics center Aron Baynes grimaces after getting a high five from guard Kyrie Irving during the first quarter against the Phoenix Suns at TD Garden. (Winslow Townson-USA TODAY Sports)

Aron Baynes grimaces during the first quarter against the Phoenix Suns at TD Garden. (Winslow Townson-USA TODAY Sports)

The Celtics announced on Thursday that center Aron Baynes underwent successful surgery on his broken hand. He’s expected to return in 4-6 weeks.

The surgery took place at New England Baptist Hospital, where Dr. Hervey Kimball repaired a fracture to Baynes’ fourth metacarpal in his left hand. The injury occurred early in the first quarter of the Celtics’ 111-103 loss to the Phoenix Suns on Wednesday.

With Baynes out, the Celtics are likely to turn more to rookie big man Robert Williams. He logged a season-high 25:30 against the New Orleans Pelicans on Dec. 10, and played 24:04 against the Suns on Wednesday.

Over his last five games, Williams has averaged 5 points with a .750 field goal percentage, 6.2 rebounds and 3.2 blocked shots in 18 minutes. The rookie out of Texas A&M should be counted on more to be a presence around the rim in Baynes’ absence.

Jul 6, 2018; Las Vegas, NV, USA; Boston Celtics forward Robert Williams (44) against the Philadelphia 76ers during an NBA Summer League game at Thomas & Mack Center. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports

Daniel Theis could also see an uptick in minutes after averaging 18.8 in his last 10 games.

The Celtics’ plan to replicate what Baynes brings to the lineup won’t come from outside the organization. President of basketball ops Danny Ainge told Toucher & Rich on Thursday that the C’s are unlikely to make any moves at center in the wake of the injury.

Boston is also without Al Horford, who’s dealing with a sore knee, and Guerschon Yabusele, who has an ankle injury. Ainge believes Yabusele could be 1-2 days away from returning.

Either way, it’s a major test of the Celtics’ frontcourt depth with Baynes out 4-6 weeks and the additional injuries plaguing this group.

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