Tettleton took over the game in the second quarter, scoring on a 1-yard run and throwing a 7-yard scoring pass to Riley Dunlop. In the third quarter, Tettleton tossed an 8-yard TD pass to Donte Foster and scored on another 1-yard run.
Tettleton completed 16 of 28 passes for 153 yards.
New Mexico State rushed for just six yards.
New Mexico State quarterback Andrew Manley threw for 362 yards and two touchdowns. Taveon Rogers scored on a 97-yard kickoff return.