Russell Westbrook got his 15th triple-double of the season by the midpoint of the third quarter, and the Oklahoma City Thunder beat the Heat, 106-94, at Miami on Tuesday night to extend their winning streak to four games.

Westbrook finished with 29 points, 17 rebounds, and 11 assists. He was two rebounds shy of the triple-double at halftime, and now has six before the end of third quarters this season.

Enes Kanter scored 19 points and Steven Adams added 15 — including a highlight-reel dunk in the first half — for the Thunder.

Josh Richardson tied a career high with 22 points for the Heat. James Johnson scored 16 and Tyler Johnson added 15, both off the bench, for Miami.

The Heat were without point guard Goran Dragic, sidelined by back spasms.

Oklahoma City dominated in the paint, outscoring Miami, 58-32. And Westbrook simply controlled play, making 11 of 22 shots from the field and then scoring 11 points in the fourth to help the Thunder close out the win.

‘‘They see the numbers and what he does in games. They don’t get a chance to see behind the scenes,’’ Thunder coach Billy Donovan said. ‘‘The one thing I admire about him is he practices every single day. He has great energy every single day. He comes to every shootaround and he practices. He puts the time in and that’s the reason why he’s as successful as he is.’’

Rockets 123, Mavericks 107 — James Harden scored 34 points and Houston completed a four-game season sweep of host Dallas in a game marred by eight technical fouls.

Harden had 24 points at halftime and finished with 11 assists without playing in the fourth quarter. The Rockets broke a 37-all tie in the second with a 16-0 run and improved to 13-2 in December.

With two games left in the month, Houston can tie the franchise record of 15 wins from November 1996.

Five of the technicals came during the third quarter, and another during the break before the fourth when Houston’s Trevor Ariza was assessed his second technical and ejected.

There were also two flagrant fouls, both against Dallas.

Most of the technicals came during dead-ball situations, with players and Dallas coach Rick Carlisle complaining to officials. Carlisle mockingly clapped at the refs, saying ‘‘good call,’’ after he was whistled for one.

Harrison Barnes scored 21 for the last-place Mavericks, who lost their second straight following their first two-game winning streak of the season.

The game started with a bit of an edge when Harden had a couple of sharp exchanges with Dallas center Andrew Bogut, who returned after missing 11 games with a right knee injury. Bogut got one of the flagrant calls on a hard screen that staggered Harden, who had one of the third-quarter technicals.