CORVALLIS, Ore. (AP) - With so many scenarios for how the season may - or may not - play out, No. 5 Oregon was focused only on Oregon State and the 116th Civil War.

Oregon's march toward the national championship game detoured last Saturday with a 17-14 overtime loss to Stanford. Now, even the team's shot at the Pac-12 championship is in jeopardy.

Saturday's Civil War at Reser Stadium is a must-win for Oregon (10-1, 7-1) if they want to keep their hopes for a fourth straight Pac-12 title alive. But the Ducks will need UCLA to help with a victory over Stanford in Los Angeles. To be back in the mix for a national championship berth, they'll also need USC to topple undefeated and top-ranked Notre Dame.