Barton had made just five of his previous 21 3-point tries, going 0 for 4 in his last game. He went 3 of 4 behind the arc Monday and 6 of 9 overall in his most productive outing since the All-Star break.
"We needed that man," said Nuggets coach Michael Malone, who gave Barton a pregame pep talk. "Will Barton is a very important piece of our team and we all know that. Since the break, he hasn't found his groove and tonight to see him shoot the ball as well as he did and to be the playmaker he was, it was fantastic."
Barton said he was buoyed by his pregame chat.
"That helped me a lot because I trust in my coaching staff and they believe in me," Barton said. "They tell me I'm a big part of this team and they need me to play well. It does a lot for my confidence."
"That's a good team over there. I've said that before," Lakers coach Luke Walton said. "They're playing great right now. They're scoring the heck out of the ball and they have shooters all over the floor and big men that are brilliant passers."
The Lakers trailed by 32 points after a layup by Mason Plumlee early in the third quarter but managed to cut the deficit to 93-76 going into the final period, outscoring the Nuggets 29-14 over the last nine minutes of the third.
But the Nuggets quashed the Lakers' bid to make a game of it, starting the fourth with an 11-0 burst that included 3-pointers by Gallinari and Murray and rebuilt Denver's advantage to 28 points.
The Nuggets led by as many as 28 points in the first half. They put together a 15-0 run in the second quarter that helped them take a 67-43 lead at halftime.
Lakers: Clarkson started over Russell mainly for evaluation purposes. "D'Angelo has been playing great when you look at his numbers, but we're 1-7 after the break and I want to see some other looks," Walton said before the game.
Nuggets: F Wilson Chandler missed the game because of a groin injury. Fellow forwards Kenneth Faried (low back) and Darrell Arthur (knee) also were out. ... Emmanuel Mudiay, supplanted a month ago by veteran Jameer Nelson as the starting point guard, has handled the demotion professionally and understands refining and polishing his game is the surest pathway to rejoining the lineup, Malone said.
Surrounded by three Lakers players after pulling down an offensive rebound, Jokic flipped a no-look, over-the-shoulder pass to Barton cutting through the lane, and the rangy forward threw down a reverse dunk that brought a gasp from the crowd and gave the Nuggets a 16-point lead with 7:07 left in the second quarter.
Lakers: Head to Houston to play the Rockets on Wednesday night.
Nuggets: Continue a three-game homestand by hosting the Los Angeles Clippers on Thursday night.
Marcus Georges-Hunt is hoping his toughness and willingness to play hard-nosed defense can help him make the Timberwolves' roster.
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Neither forward Aaron Gordon nor point guard Elfrid Payton is expected to sign an extension with the Orlando Magic by the Oct. 16 deadline.