College football · NFLTuesday, October 13, 2026
The Upset Report
2018 · Week 3 · Saturday, September 15, 2018

San Diego State upsets No. 23 Arizona State, 28–21

San Diego State closed as a 5-point underdog and won outright. It was unranked San Diego State taking down the No. 23 team in the AP poll.

Final28–21
Upset size6.5
Rank in 2018102nd of 181
5-point underdogUnranked beat No. 23

It was the 6th-biggest of 12 upsets in 2018 Week 3, and the 102nd-biggest of the 2018 season. San Diego State pulled off 1 other upset in 2018.

Other upsets in 2018 Week 3

  1. 23.5-point underdogUnranked beat No. 6Recap
    Upset size33.5
  2. 21-point underdogRecap
    Upset size21
  3. 16-point underdogRecap
    Upset size16
  4. 10-point underdogNo. 12 beat No. 7Recap
    Upset size12.5
  5. 24, 19
    10-point underdogRecap
    Upset size10

San Diego State’s other 2018 upsets

  1. Week 613.5-point underdogRecap
    Upset size13.5

More: San Diego State upsets · Arizona State upsets · all Week 3 upsets · the 2018 season · how upset size works