Detroit Lions beat Chicago Bears, 19–16

The Lions closed as 3.5-point underdogs and won outright. The betting market gave them a 38% chance.

It was the 3rd-biggest of 4 NFL upsets in 2025 Week 18, and the 45th-biggest of the 2025 season. Detroit Lions pulled off 1 other upset in 2025.

Other NFL upsets in 2025 Week 18

1. Cleveland Browns 20, Cincinnati Bengals 18

   9.5-point underdog21% to winRecap
   Upset size9.5
2. Pittsburgh Steelers 26, Baltimore Ravens 24

   4.5-point underdog34% to winRecap
   Upset size4.5
3. Las Vegas Raiders 14, Kansas City Chiefs 12

   3.5-point underdog34% to winRecap
   Upset size3.5

Detroit Lions’ other 2025 upsets

1. Detroit Lions 38, Baltimore Ravens 30

   Week 34.5-point underdog32% to winRecap
   Upset size4.5

More: Detroit Lions upsets · Chicago Bears upsets · all Week 18 upsets · how upset size works