Colorado stuns No. 17 TCU, 45–42

Colorado closed as a 20-point underdog and won outright. It was unranked Colorado taking down the No. 17 team in the AP poll.

It was the 2nd-biggest of 9 upsets in 2023 Week 1, and the 4th-biggest of the 2023 season. It was Colorado's only upset win of 2023.

Other upsets in 2023 Week 1

1. Texas State 42, Baylor 31

   27.5-point underdogRecap
   Upset size27.5
2. Duke 28, No. 9 Clemson 7

   12.5-point underdogUnranked beat No. 9Recap
   Upset size21
3. Wyoming 35, Texas Tech 33

   13.5-point underdogRecap
   Upset size13.5
4. Northern Illinois 27, Boston College 24

   10-point underdogRecap
   Upset size10
5. UL Monroe 17, Army 13

   9-point underdogRecap
   Upset size9

More: Colorado upsets · TCU upsets · all Week 1 upsets · the 2023 season · how upset size works