Ellington went 6-of-7 from beyond the 3-point arc and netted 19 of his points in the second half, during which the Grizzlies outscored the Kings 62-36 to turn the contest into a rout.
Kings star DeMarcus Cousins was limited to 10 points on 3-of-9 shooting from the field as Sacramento lost a second straight.
John Salmons led the Kings with 17 points.
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