Joey DeMartino rushed for 120 yards to help the Aggies (3-2, 2-0 Mountain West) win their 12th straight in conference play, an ongoing school record, and their eighth consecutive road conference contest.
D.J. Tialavea, Keega Anderson and Brand Swindall caught touchdowns pass as Utah State beat the Spartans for the fifth straight time.
David Fales threw for 314 yards for the Spartans (1-3, 0-1), who lost their third straight following an opening victory. Jason Simpson ran for 48 yards and scored a touchdown.
Austin Lopez kicked a pair of field goals, extending his streak of consecutive field goals to 23, before missing from 42 yards out at the end of the first half, the sophomore's first career miss.