When No. 2 Oregon faces its toughest test of the season in No. 18 Southern California on Saturday, the Ducks will attempt to extend a trend that's startling for a team known for its jet-fueled offense. Oregon is trying to reach its third Bowl Championship Series bowl in four years with a completely unproven quarterback. Oregon drove to the 2009-season Rose Bowl with quarterback Jeremiah Masoli, a junior-college transfer who began the previous season on the fifth string. In 2010 Oregon went 12-0 and narrowly lost the BCS championship to Auburn with first-year starter Darron Thomas. This year, first-year starter and redshirt freshman Marcus Mariota has the Ducks at 8-0 and No. 4 in the BCS standings. He turned 19 on Tuesday.