Northwestern upsets No. 17 Wisconsin, 33–31
It was unranked Northwestern taking down the No. 17 team in the AP poll.
Final33–31
Upset size4.5
Rank in 200927th of 64
It was the 3rd-biggest of 4 upsets in 2009 Week 12, and the 27th-biggest of the 2009 season. Northwestern pulled off 1 other upset in 2009.
Other upsets in 2009 Week 12
Ole Miss 25, 
No. 10 LSU 23Upset size8
California 34, 
No. 14 Stanford 28Upset size6
Syracuse 31, 
No. 25 Rutgers 13Upset size0.5
Northwestern’s other 2009 upsets
Northwestern 17, 
No. 8 Iowa 10Upset size9
More: Northwestern upsets · Wisconsin upsets · all Week 12 upsets · the 2009 season · how upset size works