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

Definitions
Team Over Record Over % Under % Total +/-
LA Rams 48-49-0 49.5% 50.5% -0.1
Seattle 32-34-2 48.5% 51.5% -0.7
Arizona 57-62-3 47.9% 52.1% +0.4
San Francisco 42-46-0 47.7% 52.3% +0.1