Injured Cal quarterback Kevin Riley will undergo an MRI today to determine the extent of the left knee injury he suffered against Oregon State.

Riley was injured after delivering a 32-yard pass to wide receiver Marvin Jones in the first quarter during a 35-7 loss to the Beavers on Saturday. OSU defensive tackle Brennan Olander took Riley down awkwardly on Cal's second possession of the game, injuring the knee.

Riley went for preliminary tests in the locker room, but the MRI will provide a more definitive diagnosis. Riley watched the second half from the sideline with a knee brace and crutches.

Cal coach Jeff Tedford said after the game that it appeared the injury "looks a little bit more serious than just your everyday sprained knee." If that's the case, it's likely Riley's college career is over. There are only four games remaining -- five if the Bears qualify for a bowl game -- but a major knee injury would take several months to heal. Riley is a fifth-year senior and three- year starter.