For the first quarter of Monday night’s game at TD Garden, the Celtics’ offense consisted of Jaylen Brown, and not much else.

Brown poured in 16 first-quarter points, but Boston trailed cellar-dwelling Washington by 14 — an uninspiring start for a team that had just lost at home to the likely lottery-bound Utah Jazz two nights earlier.

Then, reinforcements arrived.

With Brown watching from the bench, his Celtics teammates blitzed the Wizards, scoring 23 of the first 27 points in the second quarter. Boston built a 10-point lead by halftime and broke the game open in the third quarter en route to a much-needed 136-107 rout at TD Garden.

The win snapped a two-game losing streak for the 4-5 Celtics, who now head to Orlando for two games against the Magic on Friday and Sunday. Washington fe

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