Mitchell also had nine rebounds and eight assists, and Joe Ingles had 22 points on 9-of-12 shooting along with 10 assists. Jae Crowder added 18 points off the bench.
A basket by Royce O'Neale put Utah up 98-76 in the opening four minutes of the fourth quarter. The shot marked Utah's largest lead of the game.
Mitchell threw a full-court pass to a streaking Ingles for a layup and a 66-56 lead with 5:44 remaining in the third. Utah led 82-67 when O'Neale made a 3-pointer with 2.2 seconds to go in the quarter.