What is every AFC West Division team's record against the over/under line as an underdog since the 2003 season?

Definitions
Team Over Record Over % Under % Total +/-
LA Chargers 74-69-2 51.8% 48.3% +1.4
Kansas City 68-66-5 50.8% 49.3% +1.3
Las Vegas 115-122-6 48.5% 51.5% +0.1
Denver 69-74-2 48.3% 51.8% +0.5