What is every AFC West Division team's record against the over/under line as a road underdog since the 2012 season?

Definitions
Team Over Record Over % Under % Total +/-
LA Chargers 29-23-0 55.8% 44.2% +2.2
Denver 16-14-1 53.3% 46.7% +1.9
Kansas City 17-16-2 51.5% 48.5% +2.9
Las Vegas 28-28-1 50.0% 50.0% -0.1