Carolina Panthers stun Arizona Cardinals, 34–21

The Panthers closed as 10-point underdogs and won outright. The betting market gave them a 20% chance.

All 2009 NFL Week 8 upsets, biggest first

An NFL upset is an underdog getting 3.5 or more points on the closing line winning outright. Upset size is the points it overcame. How it’s scored

1. Carolina Panthers 34, Arizona Cardinals 21

   10-point underdog20% to winRecap
   Upset size10
2. St. Louis Rams 17, Detroit Lions 10

   3.5-point underdog39% to winRecap
   Upset size3.5
3. Miami Dolphins 30, New York Jets 25

   3.5-point underdog36% to winRecap
   Upset size3.5
4. Minnesota Vikings 38, Green Bay Packers 26

   3.5-point underdog36% to winRecap
   Upset size3.5