Yep. BYU's defense, despite being put in awful positions at the start of the game, shut down Utah's offense except for basically the final drive when they needed to get a stop and give the offense one more chance to tie, and without Tuiloma, they couldn't do it.
Here is how the Ute offense performed in the bowl game:
1st Quarter:
1st drive: 6 plays, 25 yards, TD
2nd drive: 1 play, 1 yard, TD
3rd drive: 5 plays, 39 yards, TD
(BYU stops turning the ball over)
4th drive: 5 plays, 19 yards, punt
2nd Quarter:
5th drive: 3 plays, -2 yards, punt
6th drive: 3 plays, 5 yards, punt
7th drive: 3 plays, 5 yards, punt
8th drive: 1 play, -1 yards, end of half
3rd Quarter:
9th drive: 3 plays, -1 yards, punt
10th drive: 7 plays, 26 yards, punt
11th drive: 11 plays, 46 yards, stopped on downs
4th Quarter:
12th drive: 8 plays, 38 yards, stopped on downs
13th drive: 7 playss, 22 yards, end of game
I don't believe Tuiloma played in the 4th quarter.