What is every NFC West Division team's record against the over/under line as an underdog since the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Arizona 46-42-2 52.3% 47.7% +1.7
LA Rams 30-30-0 50.0% 50.0% +0.6
Seattle 27-28-2 49.1% 50.9% +0.1
San Francisco 36-42-0 46.2% 53.9% -0.2