Tommy Grady threw for three touchdowns, Darrell Mack ran for 107 yards and Utah capitalized on a long list of mistakes by No. 11 UCLA in a 44-6 upset of the Bruins on Saturday.
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.
The Bruins were shut out in the second half and went without a touchdown for the first time in a game since beating Illinois 6-3 on Sept. 13, 2003.
UCLA is the highest-ranked team Utah has beaten since a 45-31 win over No. 12 Colorado State in 1994. After starting this season 0-2 with woeful performances against Oregon State and Air Force, Utah needed this one.
Grady, making his second start for Brian Johnson (separated shoulder), was 17-for-30 for 246 yards and did not throw an interception.
Grady gave Utah a 7-0 lead with a 53-yard touchdown pass to Marquis Wilson in the first quarter. The Utes led the rest of the way, taking advantage of every break the Bruins game them. And there were plenty.
The biggest was in the third quarter, when UCLA, behind 17-6, was on the verge of a touchdown that never happened thanks to Johnson. Marcus Everett caught a pass from Olson and appeared on his way to a 52-yard touchdown, but he stumbled and then lost the ball when he tried to stretch it across the goal line as Johnson hit him.
The ball bounced straight out of the end zone for a touchback.
Then the Bruins fell behind 24-6 when Utah drove 80 yards, getting help with a pass interference call along the way, and scoring on a 12-yard pass from Louks to Dallin Rogers.
The Bruins had to settle for field goals by Kai Forbath twice after penalties stalled drives deep in Utah territory. Forbath was good from 45 yards and 52 yards in the first half, then didn't get another chance in the game.
His second kick cut the lead to 7-6, then Utah answered with another touchdown. The Utes surprised the Bruins with a fake field goal from the 34 and holder Bradon Godfrey took it up the middle 5 yards for a first down.
Grady scrambled away from trouble and dumped a short pass to Mack for 16 yards to the 12. On first down, Grady threw to Mack again in the flat and Mack went untouched for a 12-yard touchdown with 23 seconds left in the half.