San Diego State defeated CSU 18-15 Saturday afternoon at Hughes Stadium.
A 37 yard field goal by Abelardo Perez, who had missed two earlier field goals, with just under six minutes remaining gave SDSU the winning score.
A final drive for CSU failed when a fourth and 15 pass with a minute remaining fell incomplete.
CSU had tied the game in the fourth quarter on the legs of Garrett Grayson, who replaced Pete Thomas in the second quarter after leaving the game with a sprained knee.
Grayson snuck in from one yard out. He then scrambled in on the two-point conversion to make the score 15-15 with just under 10 minutes remaining in the game.
CSU struck first in the game when running back Chris Nwoke burst through a hole on the left side for a 63 yard scoring run.
San Diego State responded with a three yard pass from Ryan Lindley to tight end Alston Umuolo with less than a minute remaining in the quarter.
SDSU then took the lead by one when the snap on the extra point was bobbled by holder Brian Stahovic. He picked up the loose ball and threw it into the endzone. It was tipped and fell into the arms of Chad Young to make it 8-7 after one quarter.
Following a 21-yard third down run, SDSU running back Walter Kazee scored from one yard out to make the score 15-7.
It remained the same score at halftime.
Check Mondayâ€™s Collegian for more on the game.