What is every Southwest Division team's record against the over/under line as an underdog since the 2018-2019 season?

Definitions
Team Over Record Over % Under % Total +/-
San Antonio 172-145-7 54.3% 45.7% +1.2
Memphis 138-133-3 50.9% 49.1% +1.0
Houston 148-145-3 50.5% 49.5% +1.2
New Orleans 122-135-3 47.5% 52.5% -0.3
Dallas 97-122-2 44.3% 55.7% -0.7