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

Definitions
Team Over Record Over % Under % Total +/-
Kansas City 9-5-0 64.3% 35.7% +1.0
Las Vegas 28-23-1 54.9% 45.1% +2.7
Denver 13-18-0 41.9% 58.1% -1.5
LA Chargers 10-17-0 37.0% 63.0% -6.0