Posted by ESPN.com's Ted Miller
Tuel, originally slated to redshirt, will be the third different starting quarterback the Cougars have used this season when he leads the offense at No. 16 Oregon on Saturday.
Tuel replaced Lobbestael against USC and completed 14 of 22 passes for 130 yards with an interception. He also ran for 51 yards and led the Cougars' only scoring drive in their 27-6 defeat.
Tuel, who hails from Clovis, Calif., will become the second true freshman to start at quarterback for the Cougars. The first was Drew Bledsoe, who started the seventh game of the 1990 season against Oregon State.