At various points this season analysts have been tried to anoint the Pac-10 champ, first it was USC, then Cal, then Oregon, then some mix of Oregon, Stanford, Arizona and Oregon State. But a possibilty I have not seen elsewhere is about as fun as any I can imagine (except for Cal going undefeated of course).
Oregon loses to Arizona and Oregon State -- Finishes 6-3
Stanford loses to Cal -- Finishes 6-3
Cal beats Stanford and Washington -- Finishes 6-3
Oregon St. beats Oregon, loses to Washington State -- Finishes 6-3
Arizona beats Oregon and Arizona St, loses to USC -- Finishes 6-3
USC beats UCLA and Arizona -- Finishes 6-3
The 6 way tie would be pretty amazing. Save for one, none of the outcomes above would even be considered major upsets. Unfortunately the one game Washington St. over Oregon St. is necessary to any massive tie scenario. Still I can dream.