NEW ORLEANS — Isaiah Thomas scored 22 points, Kelly Olynyk added 21 in a reserve role, and the Boston Celtics defeated the struggling New Orleans Pelicans 111-93 on Monday night.

Jae Crowder scored 17 for Boston, while Jared Sullinger tied a career high with 20 rebounds to go with 11 points.

Seemingly out of rhythm after early foul trouble, Anthony Davis was 8-of-21 shooting and finished with 16 points and three blocks. Ryan Anderson scored 18 for the Pelicans, but New Orleans’ starting backcourt struggled. Tyreke Evans and Eric Gordon were held scoreless and wound up playing limited minutes. Reserve guard Jrue Holiday had 14 points for the Pelicans.

Avery Bradley, who started despite missing a morning shootaround with an illness, scored 11 points for the Celtics. They hit 12 3-pointers, with Thomas making all four he attempted and Bradley going 3 of 5.

New Orleans led for much of the first half, but the Celtics went on a 13-2 run to close the second quarter, with Thomas hitting two 3s and a 13-foot jumper during the surge, which put Boston up 53-44 at halftime.

The Celtics widened their lead in the third quarter, hitting four of the first six 3s they attempted in the period. Bradley made one as he was fouled by Gordon for a four-point play that gave Boston a 59-49 lead. Amir Johnson’s short hook made it 75-55 with less than 5 minutes to go in the period.

New Orleans was able to whittle is deficit down to 10 on Dante Cunningham’s driving finger roll with 11:07 to go, but Boston responded with a 12-4 run during which Crowder hit a 3 from 27 feet and Olynyk was fouled on a 3, making all three free throws. The Pelicans never threatened again, falling behind by as many as 22 and trailing by double digits the rest of the way.

Boston completed a 3-2 road trip.