Oregon junior running back De’Anthony Thomas (6) is mobbed by a group of Duck fans in the north end zone, in what has become a tradition for the season. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

Oregon sophomore wide receiver Bralon Addison (11) is brought down by California sophomore defensive back Joel Willis (18) during the first half. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

The Oregon team is led onto the field by The Duck on his custom Harley-Davidson motorcycle. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

The Cal Bears attempt to bring down Oregon sophomore wide receiver Bralon Addison (11) during the first half. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Andrew Seng/Emerald)

Oregon sophomore quarterback Marcus Mariota (8) prepares to pass during the first quarter. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

An Oregon cheerleader receives help with her makeup during the torrential downpour in the first half. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

Oregon sophomore defensive lineman DeForest Buckner (44) struggles to track down a fumbled ball after California freshman quarterback Jared Goff (16) was sacked by Oregon senior linebacker Boseko Lokombo (25). The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

Oregon sophomore running back Byron Marshall (9) is face-masked by California junior safety Michael Lowe (5) during the first half. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Michael Arellano/Emerald)

Oregon sophomore running back Byron Marshall (9) is congratulated on his play by Oregon junior offensive lineman Jake Fisher (75) during the first half. The No. 2 Oregon Ducks play the California Golden Bears at Autzen Stadium in Eugene, Ore. on Sept. 28, 2013. (Andrew Seng/Emerald)

Oregon junior running back De’Anthony Thomas (6) speaks to the media following the Ducks’ win over the Golden Bears. (Nate Barrett/Emerald)