Colorado edges No. 23 Colorado State, 42–35
It was unranked Colorado taking down the No. 23 team in the AP poll.
Final42–35
Upset size1.5
Rank in 200356th of 69
It was the 2nd-biggest of 4 upsets in 2003 Week 2, and the 56th-biggest of the 2003 season. Colorado pulled off 1 other upset in 2003.
Other upsets in 2003 Week 2
Northern Illinois 20, 
No. 15 Maryland 13Upset size5.5- Upset size1
No. 8 USC 23, 
No. 6 Auburn 0Upset size1
Colorado’s other 2003 upsets
Colorado 21, 
No. 22 Missouri 16Upset size2
More: Colorado upsets · Colorado State upsets · all Week 2 upsets · the 2003 season · how upset size works