1. Oregon (5-0).
Rationale: Who else?
Stat-wise: Ducks average 52.4 points, 14 more than anybody else in the league.
Next: Washington in Eugene Saturday night.
2. Oregon State (3-0).
Rationale: Beavers, now 14th-ranked, are the only unbeaten besides Oregon in the conference.
Stat-wise: Markus Wheaton-Brandin Cooks combo is 2-3 in Pac-12 receiving yards per game, totalling 269 average. And not against stiffs.
Next: WSU at home Saturday.
3. Washington (3-1).
Rationale: ASU’s body of work looks better, but Huskies get it on the basis of a rousing win over a top-10 team in Stanford.
Stat-wise: UW allowing a league-best 60 first downs in the post-Nick Holt era.
Next: At Oregon Saturday night.
4. Arizona State (4-1).
Rationale: Sun Devils still haven’t faced a top-flight quarterback this year. But they’re doing famously against average ones.
Stat-wise: Sun Devils lead in pass efficiency (167.4) and pass-defense efficiency.
Next: At Colorado Oct. 11.
5. Stanford (3-1).
Rationale: Even if Cardinal can’t complete a screen pass (or a fade route, or a slant, or a . . . ) they did beat USC.
Stat-wise: After two straight years of 50-percent-plus third-down conversions, Stanford is worst in the league at 29.8.
Next: Arizona at home Saturday.
6. USC (3-1).
Rationale: Why not?
Stat-wise: With Matt Barkley, Robert Woods, Marqise Lee, Silas Redd and Curtis McNeal, third-down conversion rate of 30 percent, 11th in league, is shocking.
Next: At Utah Thursday night.
7. UCLA (4-1).
Rationale: Bruins have done nicely, but win over Nebraska looks less daunting and they stumbled against Oregon State at home.
Stat-wise: A year after being ninth in Pac-12 total offense, Bruins are No. 1 at 560.4.
Next: At Cal Saturday.
8. Utah (2-2).
Rationale: Somebody’s got to be eighth.
Stat-wise: Utes were last in pass offense in 2011; they’re last in pass offense again, at 190.8 yards a game.
Next: USC Thursday night.
9. Arizona (3-2).
Rationale: Since the benchmark win over Oklahoma State, ‘Cats have been bitten by the state of Oregon.
Stat-wise: LB Jake Fischer leads the conference in tackles with 49.
Next: At Stanford Saturday.
10. California (1-4).
Rationale: In reality, Bears have played mostly below this level. Their only win is over FCS Southern Utah.
Stat-wise: The two-time league leaders in total defense are now No. 12 at stopping the run (174.8).
Next: UCLA at home Saturday.
11. Colorado (1-4).
Rationale: I think most of us would agree Washington State is better than Colorado. But that’s not what the scoreboard said on Sept. 22.
Stat-wise: Buffs rank last in pass-efficiency defense (154.7).
Next: Arizona State at home Oct. 11.
12. Washington State (2-3).
Rationale: At this level, is an explanation really necessary?
Stat-wise: The Cougars had only 17 sacks last year. This year, they’re tied for second with 16.
Next: At Oregon State Saturday.