– True freshman Josh Rosen was sharp in his first Pac-12 road game, throwing for 284 yards and accounting for three touchdowns in No. 9 UCLA's 56-30 victory over No. 16 Arizona on Saturday night.

UCLA turned this Pac-12 showdown into a laugher by halftime, turning three Arizona turnovers into TDs while building a 28-point lead.

Rosen had two touchdowns on 19-for-28 passing and ran for another score after struggling the previous two games. Paul Perkins ran for 85 yards and three more scores. The Bruins (4-0, 1-0) had 497 total yards and played well defensively without star linebacker Myles Jack, grounding Arizona's high-flying offense.

"I'm impressed with some of the losses we've had personnelwise with injuries and playing in what was supposedly a hostile environment and we immediately responded," UCLA coach Jim Mora said.

The Wildcats (3-1, 0-1) had trouble stopping Rosen and the Bruins even with All-America linebacker Scooby Wright back, plagued by a slew of missed tackles.

Arizona's Nick Wilson ran for 136 yards and Jerrard Randall added 128 after replacing Anu Solomon at quarterback in the second quarter.

UCLA has won all three games against Arizona under Mora — mostly by bogging down the Wildcats' up-tempo offense.

"You cannot beat a good team with some of the unforced errors we had today," Arizona coach Rich Rodriguez said. "They are going to force some errors, which they did, and then we had some unforced errors. You combine those things, you're not going to win.''