USC can kiss its No. 1 ranking goodbye. The team some had dubbed the greatest ever was toppled 27-21 last night by Oregon State, a 25½-point underdog. The Beavers derailed the Trojans offense and ran over what had been the nation’s best defense. “They just beat us up, plain and simple,” said a USC fullback. A blocked field goal did give USC a last chance to win, but their final drive fizzled.