The Celtics (8-8) fell 113-105 to the 12-loss Brooklyn Nets at TD Garden Friday night, marking just the Nets’ third win all season.

Boston has shown flashes of potential through the first month of regular-season play, but a lack of consistency has them toward the bottom of the Eastern Conference standings through 16 games. That inconsistency cost them a win on Friday.

It’s difficult to know how the Celtics will perform on any given night against any given opponent. This led to Jaylen Brown making blunt comments about his team’s effort, particularly on defense, after their loss to the Nets.

“Come ready to play or don’t come at all,” Brown said. “That’s my whole thing: we’ve gotta come ready to play. We just went through the motions tonight. I don’t understand.”

Jaylen Brown was asked

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