San Francisco 49ers beat Arizona Cardinals, 20–16

The 49ers closed as 5-point underdogs and won outright. The betting market gave them a 32% chance.

All 2009 NFL Week 1 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. San Francisco 49ers 20, Arizona Cardinals 16

   5-point underdog32% to winRecap
   Upset size5
2. Denver Broncos 12, Cincinnati Bengals 7

   4.5-point underdog33% to winRecap
   Upset size4.5
3. New York Jets 24, Houston Texans 7

   4.5-point underdog32% to winRecap
   Upset size4.5