Munson picked off Trey Wheeler on the Toreros' second play and returned it 19 yards for the score. He intercepted Anthony Lawrence and took it 67 yards into the end zone with 3:35 left. Damontae Kazee also had three interceptions for the Aztecs.
Donny Hageman kicked field goals of 33, 36 and 37 yards for the Aztecs.
Jack Flatau kicked a 23-yard field goal for the Toreros.
San Diego is a non-scholarship FCS school, so the win does not count toward San Diego State's potential bowl eligibility.
AP College Football website: www.collegefootball.ap.org