SANTA CLARA, California: Marcus Mariota threw for 303 yards and two touchdowns and ran for a career-high three scores, and No. 3 Oregon all but assured itself a playoff spot by overwhelming eighth-ranked Arizona 51-13 in the Pac-12 championship game Friday night.

On a rainy night in Silicon Valley, Oregon wiped out the Wildcats in front of a sparse but rowdy pro-Ducks crowd — announced as 45,618 — that sprinkled the red seats at $1.3 billion Levi’s Stadium bright yellow and green.

Mariota also boosted his credentials for the Heisman Trophy as the Ducks turned the patchy field into their personal playground.

Oregon outgained Arizona 617 yards to 224.

The selection committee will announce the four-team playoff field Sunday, and Oregon is almost surely guaranteed a berth. The Ducks (12-1) entered the week ranked second in the playoff standings.

N Illinois routs Bowling Green 51-17 for MAC title

In Detroit, Drew Hare threw for two touchdowns and ran for one, and Northern Illinois wrested the Mid-American Conference title from Bowling Green in emphatic fashion Friday night, beating the Falcons 51-17.

The Huskies (11-2) are MAC champions for the third time in four years, and they avenged a loss to Bowling Green in last season’s title game, when the Falcons spoiled Northern Illinois’ bid for an undefeated season.

Unlike the last couple years, Northern Illinois isn’t making a push for one of college football’s top bowls, but there is little doubt where the Huskies stand in the MAC. This was their fifth straight appearance in the league title game.

Bowling Green (7-6) came into the game with one of the nation’s most fast-paced offenses, but the Falcons were upstaged by Northern Illinois, which finished with 552 yards on 100 plays from scrimmage.

Ohio St., Wisconsin ready for Big Ten title game

Ohio State coach Urban Meyer is ready to get back to football.

After regrouping from a season-ending injury to quarterback J.T. Barrett, dealing with the tragic death of walk-on Kosta Karageorge and Wednesday’s team trip to Karageorge’s funeral, the Buckeyes arrived in Indianapolis focused on football.

No. 6 Ohio State (11-1, 8-0) faces No. 11 Wisconsin (10-2, 7-1) in Saturday’s Big Ten championship game. There’s plenty at stake for the East Division champion.

The Buckeyes, who are trying to avenge last year’s title game loss, also are trying to keep their College Football Playoff hopes alive.

But the Badgers have won 11 straight games in Indiana, including the league’s first two championship games in 2011 and 2012.