The winless Mustangs (0-9, 0-5 American) took the lead in the second quarter. Matt Davis tossed a 3-yard touchdown pass to Justin Lawler with :26 left in the first half and SMU leading 3-0. South Florida (4-6, 3-3) fumbled the ensuing kickoff and Cody Rademacher booted a 49-yard field goal as time expired to make it 13-0.
White got the Bulls on the board with a 12-yard strike to D'Ernest Johnson with just under eight minutes left in the game, capping a five-play, 48-yard drive.
After holding the Mustangs to a three-and-out, South Florida took over at its own 25 with 6:02 remaining. White directed a 21-play drive, finding Andre Davis for a 4-yard strike with :04 left.