Redd is the most high profile Nittany Lions football player to leave the program after the school in the wake of the Jerry Sandusky child sex abuse scandal.
Redd is eligible to transfer immediately without sitting out a season after Penn State was hit with unprecedented sanctions two weeks ago, including a four-year bowl ban. Several Penn State players, including linebacker Michael Mauti and defensive lineman Jordan Hill, said last week they are staying. Redd was not among that group.
“We welcome Silas Redd to the Trojan Family,” USC athletic director Pat Haden said in a statement. “He is an outstanding student and athlete. When the NCAA presented the option to transfer, Silas and his family put a lot of thought and research into making this decision.
Redd has two seasons of eligibility remaining. He ran for 1,241 yards and seven touchdowns last season, and ran for more than 100 yards in five consecutive games in mid-October. He was a second-team All-Big Ten pick. Earlier this year, he was named to the Walter Camp and Doak Walker awards watch lists.