Mustain enrolled at the University of Southern California (USC) on May 21, 2007.[17] He joined his former Springdale High School and Arkansas teammate, Damian Williams, who had transferred to USC the previous January. Mustain found the West Coast offense run at USC to be appealing, it differed from the spread offense run by Malzahn and appealed to his quarterback playing style.[2]
Under NCAA transfer rules, Mustain sat out the 2007 season and served as the quarterback for the scout team. On December 19, 2007, he was rewarded with the Service Team Player of the Year (offense) award at the Trojan football team's annual awards banquet.[18]
Mustain became eligible to play again for the 2008 season, with three years of eligibility remaining.
I guess I wasn’t paying attention to Mustain sitting out a year because SC wasn’t intimidated by his mommy.