The Boston Celtics climbed one spot to No. 18 in this week's ESPN.com NBA Power Rankings.

Writes curator Marc Stein: "The Celtics suddenly find themselves on the short list of teams (along with Sacramento) to squander a 26-point lead this season. But it's safe to say Isaiah Thomas is finding his niche, ranking as the first Celtic with at least 19 points in four straight games off the bench since Kevin McHale in February 1990."

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