Utah (22-5) have won 18 of their last 19 games since the beginning of 4-4.
Kendrick Nunn scored 20 points for Miami, who missed 11 interceptions to open the third quarter. Jimmy Butler added 15 points, eight rebounds and five assists. Bam adebayo finished with 14 points, 10 rebounds and six assists.
The Heat broke a four-game winning streak.
Mitchell made three straight baskets, including backs, in just 58 seconds to launch a 16-0 Jazz series to open the second half. Royce O’Neale stole the ball with a steal and a kick, bringing Utah to a 63-42 lead.
Miami scored its first points in the second half Tyler Herro hit the jumper with 5:51 remaining in the third quarter.
Miami led through the entire first quarter after jumping to a 13-4 lead. Butler scored one basket and assisted three more to give the Heat an early advantage.
Utah struggled to build any consistent pace in attack during the opening quarter against a tough Heat defense, passing 1 for 12 from a 3-point range.
The shots started falling in the second quarter. Utah scored points on six direct possessions early in the period and equalized on 31 on Bogdanović’s schedule. Jordan Clarkson scored a basket and assisted four more during that period.
Herro i Max Strus scored back-to-back baskets for 36-31, and Heat then missed eight interceptions and went six minutes without a goal.
Utah responded with a 14-0 move in that section and led 45-36. Jazz has finally moved forward on its back for the first time in the O’Neale and Clarkson baskets.
Heat: Goran Dragic (left wrist sprain) i Avery Bradley (right calf strain) did not travel with the team to Utah. … Strus averages 18.0 points in the last two games. He scored 15 against jazz. … Kelly Olynyk finished with 10 rebounds.
Jazz: Mike Conley he missed his fourth consecutive game (squeezing the right box) … Gobert’s half-rise at half-buzz in the first quarter was his first attempt to score with 3 points since the 2016-17 season. He is 0 for 4 from a 3 point range for his career. … Utah beat Miami 13-2 in second chance points and 20-10 in quick break points.
Heat: Visit the Los Angeles Clippers on Monday.
Jazz: Host the Philadelphia 76ers on Monday.