This Thunder victory snapped a four game losing streak.
The All-Star forward leads the National Basketball Association with 13 technical fouls this season, two more than teammate Kevin Durant, Westbrook and Charlotte Hornets center Dwight Howard, who are tied with 11 each.
Paul George poured in a game-high 38 points and grabbed six steals to lead a Thunder defence that forced 25 turnovers.
"Russ was instant offense", Paul George said after the game (ESPN). But Tuesday night he could have used a fifth one because the four he has were not up to the task against Oklahoma City. Durant scored 33 points but didn't get as much help from the cold-shooting Splash Brothers of Stephen Curry and Klay Thompson, who added 21 and 12 points, respectively. They lost two games in a row for the first time this season, falling to the Denver Nuggets on Saturday and the Thunder on Tuesday.
Oklahoma City controlled almost every aspect of this contest.
The Warriors came into this season as such heavy favorites to repeat one would have had to bet $220 to win just $100 off what seemed like one of the most obvious bets in almost two decades of National Basketball Association play.
With the Thunder entering play on February 7 at 31-24, they sit just 2.5 games behind the Timberwolves for the fourth seed out West and just three games behind the Spurs for third. "Games like tonight, I don't really worry about that, I know we're gonna come compete". It also marked the first occasion since the 2012 season that the Warriors trailed for the entire game.
Kevin Durant (left hand contusion) is questionable for the Warriors game against the Dallas Mavericks on Thursday at Oracle Arena.
Oklahoma City will try to keep the good times rolling when they face the Lakers in Los Angeles Thursday night.
Steve Kerr recently commented on how his team needs to get to the All-Star break. We're just not playing the way we normally do in terms of the ball movement, the pace and the spacing. "It's been a struggle".
After 55 games, fans may still be trying to figure out who the Thunder are, but Carmelo Anthony sure doesn't sound like he is.
Finally, the Warriors' normal defensive stoppers haven't played at the same level this season.