BERKELEY, Calif. (AP) - Oregon's defensive line was so depleted that backup tight end Koa Ka'ai and two other freshmen were pressed into emergency duty.

Big-play running back Kenjon Barner was bottled up all night so freshman quarterback Marcus Mariota put the game on his arm.

Oregon overcame numerous hurdles to beat California 59-17 on Saturday night to move into the top spot in The Associated Press poll with just three weeks left in the regular season.

The Ducks (10-0, 7-0 Pac-12) were without four of their top five linemen coming into the game and then lost defensive tackle Taylor Hart in the first quarter to another injury but still overwhelmed the Golden Bears.