No. 18 Oklahoma stuns No. 6 Oklahoma State, 33–24

Oklahoma closed as a 10.5-point underdog and won outright. No. 18 beat No. 6 in the AP poll.

All 2013 Week 15 upsets, biggest first

Upset size is the points the winner overcame on the closing line plus a bonus for beating a ranked team. How it’s scored

1. No. 18 Oklahoma 33, No. 6 Oklahoma State 24

   10.5-point underdogNo. 18 beat No. 6Recap
   Upset size16.5
2. Rice 41, Marshall 24

   11-point underdogRecap
   Upset size11
3. No. 10 Michigan State 34, No. 2 Ohio State 24

   6.5-point underdogNo. 10 beat No. 2Recap
   Upset size10.5
4. Bowling Green 47, No. 16 Northern Illinois 27

   3-point underdogUnranked beat No. 16Recap
   Upset size8
5. No. 7 Stanford 38, No. 11 Arizona State 14

   3-point underdogRecap
   Upset size3