Detroit Lions stun Dallas Cowboys, 39–31

The Lions closed as 13.5-point underdogs and won outright. The betting market gave them a 11% chance.

All 2006 NFL Week 17 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. Detroit Lions 39, Dallas Cowboys 31

   13.5-point underdog11% to winRecap
   Upset size13.5
2. San Francisco 49ers 26, Denver Broncos 23

   10.5-point underdog18% to winOTRecap
   Upset size10.5
3. Pittsburgh Steelers 23, Cincinnati Bengals 17

   6-point underdog31% to winOTRecap
   Upset size6
4. New England Patriots 40, Tennessee Titans 23

   3.5-point underdog37% to winRecap
   Upset size3.5