It’s been quite the topsy-turvy Pac-10 football season so far in 2009.

USC lost to a Washington team that went 0-12 last season one week removed from a huge win against Ohio State in Columbus.

Oregon went from a team that was dead in the water after that horrendous night on the blue turf in Boise to one back in the thick of the conference title race after throttling a top-10 Cal team last weekend.

Stanford is on the rise with a legitimate Heisman candidate in its backfield, while Oregon State has tumbled after two consecutive losses in Corvallis.

At least we still have Washington State to provide consistency.

These will surely continue to shift and change as we head into the meat of the conference season, but here is this week’s edition of The State Press Pac-10 Power Rankings.

1. Oregon (3-1, 1-0 Pac-10)

After absolutely manhandling then-No. 6 California 42-3 on Saturday, the Ducks move up into the No. 1 spot in this week’s power rankings.

UO torched the Golden Bears for 524 yards of total offense, including 253 passing yards and three touchdowns from junior quarterback Jeremiah Masoli and 118 rushing yards from redshirt freshman running back LaMichael James.

But the star of the game was senior tight end Ed Dickson, who finished with 11 catches for 148 yards and three touchdowns, which earned him the Walter Camp National Offensive Player of the Week.

Yes, UO forgot to show up against Boise State on opening night. But the Broncos are ranked No. 5 in the country now, in case you weren’t paying attention.

2. USC (3-1, 1-1 Pac-10)

Nothing like a game against Washington State to get the season back on track, huh?

The Trojans jumped out to a 20-0 lead against the Cougars, and freshman quarterback Matt Barkley returned from a shoulder injury for USC and threw for 247 yards and one touchdown.

Many are already proclaiming USC is heading for a “down” year, and we will find out in the next month. The Trojans will face Cal, Notre Dame and Oregon on the road in October.

3. Cal (3-1, 0-1 Pac-10)

Simply put, the Golden Bears laid an egg against the Ducks.

Not only was the defense awful, but the Cal offense mustered just 207 yards in Saturday’s loss. Junior running back Jahvid Best was held to only 55 rushing yards, and senior quarterback Kevin Riley threw for just 123 yards and was sacked four times.

The Golden Bears tumbled in the polls after the debacle in Eugene, but they will have a chance to right the ship when USC comes to town this weekend.

4. UCLA (3-0, 0-0 Pac-10)

The Bruins had a bye last week, so they don’t budge in this edition of the power rankings.

UCLA is also the only team in the conference that still has a zero in the loss column, and the Bruins’ win in Knoxville earlier this month looks even better after the way Tennessee hung with No. 1 Florida two weeks ago.

However, moving the football is still an issue for UCLA, as it ranks dead last in the conference in total offense (301.3 yards per game).

Senior quarterback Kevin Craft will make his second consecutive start in place of true freshman Kevin Price, who is out with a broken jaw, when the Bruins travel to Palo Alto this weekend to take on Stanford.

5. Stanford (3-1, 2-0 Pac-10)

There are two reasons Stanford is ranked in the top half of the conference.

One, the Cardinal is the only team in the conference to have two wins.

Granted, those victories were against Washington and WSU, but Stanford was able to quickly squash the hubbub surrounding UW after it beat USC.

The other reason is Toby Gerhart. The senior running back ranks third in the nation in rushing (129 yards per game) and is making a strong case that he’s not only the best back in the Bay Area, but the best in the nation.

6. UA (3-1, 1-0 Pac-10)

A change at quarterback may have been exactly what the Wildcats needed.

Sophomore Nick Foles completed 25 of his 34 passes for 254 yards and three touchdowns in his first career start last weekend to help propel the Wildcats to a win at Oregon State.

The Wildcat defense gave up 407 yards in the shootout against the Beavers, but senior cornerback Devin Ross was named the Pac-10 Defensive Player of the Week after racking up 12 tackles and an interception.

UA has a bye this week before traveling to Seattle to face UW on Oct. 10.

7. ASU (2-1, 0-0 Pac-10)

The Sun Devils gained some national respect after nearly pulling off the upset at now-No. 18 Georgia last week, but it’s still hard to gauge where they fit in the Pac-10 picture since they haven’t played a conference foe yet.

What we do know is that the ASU defense is straight-up nasty. The Sun Devils rank third in the nation in total defense (211 yards per game) and first in turnover margin (plus 10), despite facing one of the more potent offenses in the nation in UGA last week.

But the offense is still struggling to find the end zone, and it will try to find its groove when it welcomes OSU to Sun Devil Stadium on Saturday.

8. Washington (2-2, 1-1 Pac-10)

The Huskies came back down to Earth against Stanford and showed why their No. 24 ranking in last week’s Associated Press poll was just plain silly.

That doesn’t take away the win against USC, or the fact that junior quarterback Jake Locker is one of the best athletes in the conference (269 yards of total offense per game), but UW still has some building to do before it returns to elite status.

9. Oregon State (2-2, 0-1 Pac-10)

After back-to-back home losses to No. 10 Cincinnati and UA, the Beavers are entering potentially dangerous territory.

OSU will try to snap its losing skid against the Sun Devils in Tempe, where it has not won since 1969.

The do-it-all brother combo of James (181.5 yards) and Jacquizz Rogers (153.2 yards) still rank No. 1 and No. 2 in the conference in all-purpose yards.

But the Beavers haven’t been able to stop opposing teams through the air, as they rank 110th in the nation in pass defense (272 yards per game).

10. Washington State (1-3, 0-2 Pac-10)

Nothing’s changed: The Cougars are just plain bad.

WSU ranks dead last in the conference in many major offensive categories, including scoring offense (17.2 points per game) and rushing offense (100 yards per game).

The other side of the ball is even worse. The Cougars rank last in the country in total defense (503.50 yards per game) and pass defense (338.2 yards per game).

It’s hard to find another win on WSU’s schedule.

Reach the reporter at gina.mizell@asu.edu.