Dennis Dixon will have surgery on the left knee that buckled early in second-ranked Oregon's upset loss to Arizona, spoiling his chance to win the Heisman Trophy. The quarterback tore his anterior cruciate ligament during Oregon's 35-23 victory over Arizona State on Nov. 3, according to coach Mike Bellotti, but he had rested it and felt as if he was ready to play Thursday night against the Wildcats. Now Dixon will miss the rest of this season. "He's a little bit despondent because he obviously wanted to continue to play," Bellotti said.