Freshman Alfred Jackson recorded his second blocked punt in three games midway through the quarter, giving SDSU possession at Colorado State's 10. The Aztecs gained only five yards before O'Brien came on to set the WAC record with a 22-yard field goal, providing the Aztecs a 38-17 lead.
Colorado State drove to a fourth-and-one at the Aztec 12 on its next possession. However, Schultz dropped Stouffer's pass on fourth down.
Early in the fourth quarter, Marvin Gross intercepted a Santos pass at the Ram 47. Colorado State drove 53 yards, scoring on a six-yard pass from Stouffer to Steve Bartalo on fourth down.
With his team trailing, 38-23, Coach Leon Fuller decided to go for the two-point conversion. The attempt failed when Stouffer's pass fell incomplete.
After a clipping penalty on the ensuing kickoff, the Aztecs were faced with field position at their 3. Helped by a 23-yard pass from Santos to Kenny Moore and a 29-yard run by Hardy, the Aztecs drove to the Colorado State 3.
Hardy scored an apparent touchdown from there, only to have it called back by a clipping penalty. After a holding penalty on third down, SDSU was moved back to the 21.
On came O'Brien for a 37-yard field goal, his 13th straight success. Thirty seconds later, Hardy rushed for a 36-yard touchdown with 30 seconds remaining.
The Aztecs improved their overall record to 2-1, while Colorado State fell to 1-3 overall and 1-1 in the WAC.
All was not well for SDSU, however, as linebacker Jack Eaton will undergo surgery today for a dislocated right thumb. He is expected to be sidelined at least two weeks.