Moody, the second-leading rusher on USC last season, had also considered Texas and Oklahoma State.
Moody, who rushed for 459 yards and two touchdowns, averaging a team-high 5.8 yards per rush last season, left USC because of the school's depth at his position, citing a "business decision."
At USC, running back Chauncey Washington's status for the season opener is in question because of a shoulder sprain. Sophomore Stafon Johnson and true freshman Joe McKnight are among those also competing for the job.
Joe Schad is a National College Football Reporter for ESPN.