Buffalo Bills upset Chicago Bears, 23–20

The Bills closed as 7-point underdogs and won outright in overtime. The betting market gave them a 29% chance.

It was the biggest of 3 NFL upsets in 2014 Week 1, and the 15th-biggest of the 2014 season. Buffalo Bills pulled off 3 other upsets in 2014.

Other NFL upsets in 2014 Week 1

1. Carolina Panthers 20, Tampa Bay Buccaneers 14

   5.5-point underdog32% to winRecap
   Upset size5.5
2. Miami Dolphins 33, New England Patriots 20

   3.5-point underdog37% to winRecap
   Upset size3.5

Buffalo Bills’ other 2014 upsets

1. Buffalo Bills 17, Detroit Lions 14

   Week 54.5-point underdog33% to winRecap
   Upset size4.5
2. Buffalo Bills 17, New England Patriots 9

   Week 174.5-point underdog33% to winRecap
   Upset size4.5
3. Buffalo Bills 21, Green Bay Packers 13

   Week 153.5-point underdog38% to winRecap
   Upset size3.5

More: Buffalo Bills upsets · Chicago Bears upsets · all Week 1 upsets · how upset size works