The Knicks outscored the Clippers 35-21 in the fourth quarter and 69-51 in the second half, spoiling the debut of new Los Angeles acquisition James Harden.
Barrett finished with 26 points while Julius Randle posted a season-high 27 points and grabbed 10 rebounds for the Knicks, who won at home for the first time in three tries this season. Mitchell Robinson (13 points, 15 rebounds) also had a double-double for New York.
Kawhi Leonard scored 18 points while Harden finished with 17 points in 31-plus minutes in his first action since the Philadelphia 76ers dealt him to the Clippers on Oct. 31.
Tyler Herro finished with 22 points despite going just 2-for-10 from 3-point range on a night when the Heat collectively went just 12-for-37 from beyond the arc. The Miami defense forced Los Angeles into an even worse shooting performance from deep, however, limiting the Lakers to 8 of 26 from long range.
LeBron James scored seven of his game-high 30 points in a 1:19 stretch late in the fourth quarter, helping trim a 10-point Miami lead to one. His last points of the burst, a three-point play with 2:39 remaining, capped the game’s scoring.