Luka Doncic scored 25 points for the Mavericks, who have dropped two of three after winning four straight. Doncic managed only two points in the final quarter.
Seth Curry added 19 points for Dallas.
Gobert’s three-point play — a dunk and a free throw — gave the Jazz their first lead since the first half at 96-95. The Mavericks responded with a 3 by Curry and two free throws from Delon Wright.
Gobert broke a 104-all tie with a tip-in, and after Tim Hardaway Jr. and Royce O’Neale exchanged 3-pointers, Gobert blocked what looked like an easy layup for Wright.
Mitchell made a pair of free throws, and then Gobert rebounded Doncic’s missed 3-pointer and was fouled. He made one of two free throws for the final margin.
The Mavericks raced to a 32-19 lead behind Doncic’s playmaking and shooting. The Jazz later scored 12 consecutive points and took a brief 37-36 lead on Georges Niang’s 3-pointer.
Kristaps Porzingis scored 15 points and Hardaway and Wright each chipped in 11 for Dallas.