GLENDALE, Ariz. (AP) - Jake Oldroyd kicked a 33-yard field goal with 4 seconds left and Jamaal Williams ran for 162 yards, helping BYU rally to beat Arizona 18-16 on Saturday night in coach Kalani Sitake's debut.

Arizona's Nick Wilson scored on a 49-yard run with 1:26 left and the Wildcats failed on the 2-point conversion, giving the Cougars a final chance at University of Phoenix Stadium.

BYU started its final drive on its own 31 and quickly moved down the field to set up Oldroyd's kick. The freshman split the uprights, raised his arms and rain toward BYU's sideline after hitting a winning kick in his first career game.

Williams looked like he never left after sitting out last season due to personal reasons, carrying 29 times to spark BYU's offense.

Taysom Hill was sharp after missing most of last season with a foot injury, hitting 21 of 29 passes for 202 yards and a touchdown.

BYU's defense pressured Arizona quarterback Anu Solomon all night and had two interceptions, including one by Kai Nacua in the fourth quarter.

Solomon, named the starter just before the game, threw for 213 yards on 20-of-30 passing.

Wilson also scored on a 15-yard run in the fourth quarter and finished with 138 yards rushing. Arizona finished with 328 total yards, 190 of that coming in the fourth quarter.