What is every AFC West Division team's record against the over/under line as an underdog since the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Kansas City 19-9-1 67.9% 32.1% +6.8
Las Vegas 45-45-1 50.0% 50.0% +0.2
LA Chargers 29-33-0 46.8% 53.2% -0.1
Denver 31-45-0 40.8% 59.2% -1.2