What did we learn in Week 12? Read on.

Barring a miracle, Oregon won't play for the national title, and even its Pac-12 supremacy is threatened: Oregon's hopes to play for a national title for the second time in three years took a huge and likely catastrophic hit with a 17-14 overtime loss to Stanford. The Ducks' chances to win the Pac-12 for a fourth consecutive year also are in doubt. If Stanford prevails at UCLA on Saturday, the Cardinal would win the North Division and would host UCLA on Nov. 30 for the Pac-12 title and Rose Bowl berth. Yes, they'd play a second time within a week.

Johnathan Franklin rushed for 171 yards and two touchdowns in UCLA's win over USC. Jeff Gross/Getty Images

The football monopoly in L.A. is over: UCLA whipped USC to capture the Pac-12 South Division, and there is no asterisk, as there was when the Bruins represented the South at Oregon last year. The Bruins jumped to an early lead and then didn't wilt when the Trojans charged back. First-year coach Jim Mora, who is now clearly in the conference coach of the year race, has emphasized mental toughness and discipline, and in a single season he seems to have changed the culture in Westwood. By the way, this is good news: The Pac-12 will benefit if the USC-UCLA game is again nationally and regionally meaningful.

USC's business is finished: It's official: The Trojans' 2012 season is a massive failure. A preseason national title contender, USC is now 7-4 overall and 5-4 in Pac-12 play. It may not be ranked this week. QB Matt Barkley, the preseason Heisman Trophy favorite who spoke of "unfinished business" when he opted to return for his senior year, suffered an injury late against the Bruins, and his business might be finished without another shot at soon-to-be No. 1 Notre Dame. While coach Lane Kiffin told reporters that he was certain of his return in 2013, it's pretty clear Kiffin will top hot-seat projections next summer.

The Pac-12 will have eight bowl-eligible teams: Arizona State's blowout win over Washington State gave the conference eight bowl-eligible teams, while Utah's loss to Arizona ensured there won't be a ninth. The Utes, Colorado, Washington State and California will stay home during the holidays. Further, if Oregon wins the Civil War and Stanford beats UCLA, the conference is almost certain to get two BCS bowl teams, with the UCLA-Stanford winner in the Pac-12 title game going to the Rose Bowl and the Ducks getting an at-large selection, likely to the Fiesta Bowl. That would mean an extra $6.1 million the conference could split up.

Tedford's tenure in California is likely at an end: While there continue to be supporters for Cal coach Jeff Tedford, a fifth consecutive defeat to end the season, particularly a 62-14 blowout at Oregon State, feels like a capper to his 11-year tenure in Berkeley. Tedford is liked and respected and probably will land on his feet and get another head-coaching opportunity, but the Bears have fallen behind in the conference pecking order -- heck, the Bay Area pecking order -- and they have bills to pay while facing growing fan apathy. A decision could come as soon as Sunday.