No. 5 Oregon (10-1, 7-1) at No. 16 Oregon State (8-2, 6-2), Reser Sadium, noon (Pac-12 Network) Line: Oregon by 9½. Series Record: Oregon leads, 59-46-10. WHAT’S AT STAKE Oregon got derailed on its way to the Pac-12 championship game last week with a 17-14 loss to Stanford. The Ducks, who dropped from the top spot in the rankings with the loss, can still go to the league title game, but they’ll have to beat Oregon State and they’ll need Pac-12 South winner UCLA to beat Stanford on Saturday at the Rose Bowl in Los Angeles. The Cardinal also have …