USC stays in the top spot, followed closely by the Cougars this week. And an unimpressive win over Utah keeps the Huskies a few spots back.

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There is still plenty at stake as the Pac-12 heads into a slate of rivalry matchups in the last weekend of the regular season.

For the second straight year, the Apple Cup will decide who wins the Pac-12 North. Washington State needs a win over cross-state rival Washington to advance to the league’s title game against Pac-12 South champ USC.

Saturday | 5 p.m. | FOX

And the Rumble in the Rockies – if that’s really a thing – features Utah and Colorado in a loser-go-home scenario. Both teams are 5-6 and need a win to become bowl eligible.

(California and UCLA – both 5-6 – also square off under similar circumstances.)

The other rivalry games pale in comparison.

The Territorial Cup pits Arizona and Arizona State in a battle to determine bowl seeding. Meanwhile, the Civil War matches a resurgent Oregon against Oregon State, which is riding a 9-game losing streak.

The Pac-12 will wind up with nine bowl eligible teams, although some are more deserving than others.

And we’ll try to sort it all out in the second to last Pac-12 Power Rankings of the season.

HEISMAN TROPHY FRONT-RUNNERS

1. Oklahoma QB Baker Mayfield: Won’t start this week against West Virginia after lewd sideline gesture towards Kansas fans last Saturday. He apologized after the incident and may have lost Heisman Trophy votes due to his childish on-field antics and off-field run-ins with the law, but he’s still the runaway favorite.

2. Stanford RB Bryce Love: Set the FBS single-season record with 11 rushes of 50 or more yards – on two bad ankles. Ranks second in the nation with 1,723 rushing yards.

3. Penn State RB Saquon Barkley: Re-ignited his campaign last week while accounting for 208 total yards and 3 TDs on 19 touches during a 56-44 win over Nebraska. After three games with fewer than 100 rushing yards, he finished with 158, including a dazzling 65-yard TD run.

In the hunt: Louisville QB Lamar Jackson, Wisconsin RB Jonathan Taylor, Arizona QB Khalil Tate and San Diego State RB Rashaad Penny.