No. 17 Iowa upsets No. 18 Michigan, 20–19

Iowa closed as a 4.5-point underdog and won outright.

It was the 7th-biggest of 11 upsets in 2026 Week 4, and the 37th-biggest of the 2026 season. Iowa pulled off 1 other upset in 2026.

Other upsets in 2026 Week 4

1. Wake Forest 30, No. 16 Louisville 27

   11.5-point underdogUnranked beat No. 16Recap
   Upset size16.5
2. Wisconsin 24, No. 13 Penn State 20

   9.5-point underdogUnranked beat No. 13Recap
   Upset size16
3. Minnesota 27, Washington 24

   12.5-point underdogRecap
   Upset size12.5
4. No. 21 Florida 52, No. 4 Ole Miss 28

   No. 21 beat No. 4Recap
   Upset size8.5
5. UAB 24, Navy 20

   6.5-point underdogRecap
   Upset size6.5

Iowa’s other 2026 upsets

1. No. 20 Iowa 41, Washington 24

   Week 63-point underdogRecap
   Upset size3

More: Iowa upsets · Michigan upsets · all Week 4 upsets · the 2026 season · how upset size works