Arizona Cardinals upset Dallas Cowboys, 33–30

Week 8 had one upset, and it took overtime. The Arizona Cardinals went into Dallas as 7-point underdogs and beat the Cowboys 33-30. The betting markets gave Arizona about a 26% chance to win.

Tennessee nearly made it two. The Titans were 13.5-point underdogs at Cincinnati and pushed the Bengals to overtime before losing 43-36. Two other underdogs won but don't count here because they were getting less than 3.5 points: Chicago won 34-17 at Seattle as a 3-point underdog, and Las Vegas beat the Jets 38-33 as a 1.5-point underdog.

Favorites went 11-3 across the 14 games. One upset is the fewest of any week this season, bringing the 2026 total to 21 through eight weeks.