The Arizona Wildcats lead the No. 5 Oregon Ducks 28-9 at halftime.

On the opening play from scrimmage, Oregon quarterback Marcus Mariota’s pass was tipped by Arizona senior Shaquille Richardson to teammate linebacker Scooby Wright for an interception. The Wildcats capitalized on Wright’s interception with a 6-yard carry by Ka’Deem Carey for a touchdown three minutes into the game.

UA scored again on its second possession off quarterback B.J. Denker’s nine-yard pass to wide receiver Nate Phillips, eating up 3:52 and going 59 yards.

Oregon was held to a 33-yard field goal by Matt Wogan on its third drive of the game after a series of penalties, including a holding call against the Ducks that negated Mariota’s rushing touchdown.

At the end of the first quarter, Oregon trailed Arizona 14-3.

Wide receiver Terrence Miller caught a five-yard pass from Denker for a touchdown to open the second quarter. Kicker Jake Smith connected on his third extra point of the game to put Arizona up 21-3 after the 83-yard drive.

Oregon responded to the Wildcats with a touchdown by tight end Pharaoh Brown off a one-yard pass from Mariota. The Ducks attempted a two-point conversion, but kicker Wogan fell short of the goal line.

Carey closed out the half with a 1-yard rushing touchdown with 18 seconds left. The Wildcats drove for 59 yards on six plays in 42 seconds after Oregon was stopped on fourth down.

The Wildcats have forced two turnovers in the game so far, the second coming from a forced fumble by spur Tra’Mayne Bondurant that was recovered by free safety Jourdon Grandon late in the second quarter.

Denker is 13-for-15 passing with 142 yards and two touchdowns so far. Carey has 95 rushing yards for two touchdowns on 24 attempts, and Miller has recorded 86 yards on eight catches, averaging 10.8 yards per carry so far.

—Follow Nicole Cousins @cousinnicole