Such large upsets where the underdog wins outright are extremely rare in the NFL, historically occurring in less than 5% of games where the spread is greater than 14 points. The largest point spread upset since 1985 remains Washington's 24-17 victory at Dallas in 1995, when Washington was a 17.5-point underdog.True, but what Super Bowl team lost as 13.5 favorites? I read somewhere (so credit to them for finding it) that the last time a team lost as such heavy favorites was 2023 Titans @ Miami.