Stanford announced junior Keller Chryst will start at quarterback against No. 20 Utah on Saturday, but redshirt freshman K.J. Costello will also play.
Chryst, who took over as the starter midway through the 2016 season, suffered what appeared to be a head injury early in the Cardinal's 58-34 win against UCLA on Sept. 23, and did not dress for last week's win against Arizona State.
With Chryst sidelined, Costello stepped in and the Stanford offense has operated at a more efficient level. The Cardinal scored touchdowns on their final seven drives against UCLA and finished the game with 553 yards of offense and amassed 501 yards against ASU.