What is every Southwest Division team's record against the over/under line as an underdog since the 2017-2018 season?

Definitions
Team Over Record Over % Under % Total +/-
San Antonio 185-161-7 53.5% 46.5% +0.9
Memphis 170-162-3 51.2% 48.8% +0.9
Houston 150-153-4 49.5% 50.5% +0.7
New Orleans 141-153-4 48.0% 52.0% -0.2
Dallas 121-153-3 44.2% 55.8% -0.9