If a first- or second-ranked Oregon is the only Pac-12 team that is BCS eligible, the Rose Bowl would be forced out of its preferred format. In that case, the Rose Bowl would almost certainly grab Notre Dame if possible.
If the Irish aren't an option, a Rose Bowl rekindling of the Oklahoma-Nebraska rivalry might have to suffice.
In his most recent BCS projections, ESPN.com analyst Brad Edwards predicted an OU-Nebraska Rose Bowl.
OUT OF THE BCS
Oklahoma's quickest way out of a 2012-13 BCS appearance is by losing another game, which isn't at all impossible.
But lots of the Sooners' BCS scenarios also depend on old foe Boise State, the Big 10 champion and Pac-12 teams other than Oregon.
The highest-ranking mid-major becomes an automatic BCS qualifier if it finishes ranked in the top 12, or in the top 16 while also ranked higher than the champion of one of the six automatic berth leagues.
Boise State opened its season with a loss to Michigan State, but hasn't lost since. The Broncos are currently No. 19 in the BCS, and seem unlikely to lose any of the remaining games on their schedule.
Nebraska is No. 20, and if the Cornhuskers win the Big 10 and stay ranked behind Boise, the Broncos would likely be in, taking up another spot that could be the Sooners'.
The toughest scenario for a two-loss Oklahoma team is an Alabama-Notre Dame championship game, with Boise State automatically qualified. Then, there would only be one at-large spot available; it would probably be for a slot opposite Kansas State in the Fiesta Bowl, and it's very unlikely bowl executives or the Big 12 would go for an OU-KSU rematch.