Hansen leaves game with undisclosed injury

Colorado quarterback Tyler Hansen has left Saturday's game against No. 9 Oregon with an undisclosed injury.

Hansen took a hard hit from free safety John Boyett after a 9-yard rush midway through the second quarter. He stayed in the game for the rest of the drive but was replaced by freshman Nick Hirschman on the Buffaloes' last possession of the first half.

Hansen, a senior, threw for 62 yards and rushed for 6 more before leaving the game. He also threw an interception that was returned for a touchdown.