What is every AFC West Division team's record against the over/under line as an underdog since the 2009 season?

Definitions
Team Over Record Over % Under % Total +/-
Las Vegas 87-81-2 51.8% 48.2% +1.1
Kansas City 43-43-4 50.0% 50.0% +0.8
LA Chargers 50-50-1 50.0% 50.0% +0.5
Denver 50-65-0 43.5% 56.5% -0.1