Arizona 59, No. 16 Oklahoma State 38: Ka'deem Carey scored four touchdowns and Matt Scott completed 28 of 41 passes with two TDs as the host Wildcats completed a big day of upsets for the Pac-12 Conference by knocking off the Cowboys.

The Wildcats (2-0) scored 30 unanswered points from late in the first quarter to early in the third to build a cushion, then came up with some big defensive plays later in the second half to pull away from Oklahoma State.

A week after throwing for a career-high 387 yards in an overtime victory against Toledo, Scott threw for 320 yards.

The Cowboys (1-1) surged to a 14-0 first-quarter lead but Arizona answered with 23 consecutive points before halftime. Arizona then marched 80 yards after taking the second-half kickoff and stretched the lead to 30-14 on a 13-yard touchdown pass from Scott to Carey.

Oklahoma State founds its groove on offense again, scoring 17 points during the remainder of the third quarter to pull back within a touchdown heading into the fourth.

The Cowboys were again moving the ball downfield when Arizona cornerback Jonathan McKnight stepped in front of pass from freshman quarterback Wes Lunt and returned it 48 yards for a touchdown with 10:24 remaining. The Wildcats converted the ensuing two-point conversion to push their lead back to 45-31.

Jared Tevis intercepted another pass by Lunt with 6:25 remaining, the fourth turnover of the game for the Cowboys, setting up a 25-yard touchdown run by Carey.

Earlier in the day, UCLA knocked off No. 14 Nebraska and Oregon State toppled No. 13 Wisconsin.

GAME NOTEBOOK: After missing a pair of 25-yard field-goal attempts in the overtime victory against Toledo last week, Arizona kicker John Bonano was 3-for-3, including a long of 46 yards. …Oklahoma State committed 15 penalties for 167 yards. … Lunt threw for 440 yards and three receivers for Oklahoma State, Tracy Moore, Blake Jackson and Josh Stewart, topped the 100-yard mark.