Robert Johnson made two interceptions and forced a fumble at the 2-yard line, making what could have been a touchdown into one of five turnovers by the Bruins (2-1).

UCLA committed 10 penalties and unraveled in the second half as Utah (1-2) scored 30 straight points and beat the Bruins for the first time. Utah had been 0-8 against UCLA, which failed to score a touchdown for the first time in four years.

Louie Sakoda kicked three field goals and Mack became the first Ute to rush for 100 yards since Quinton Ganther gained 120 in the 2005 Emerald Bowl against No. 24 Georgia Tech, which was also Utah's last win over a ranked team.

Mack ran for a touchdown and caught passes for two more in Utah's biggest offensive outburst of the season. Freshman Corbin Louks made his debut for the Utes and passed for a touchdown, keeping UCLA slightly off-balance early against two quarterbacks.

UCLA's Ben Olson completed 20 of 40 passes for 290 yards and was intercepted three times.