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

Definitions
Team Over Record Over % Under % Total +/-
Indianapolis 44-36-0 55.0% 45.0% +1.7
Tennessee 43-39-1 52.4% 47.6% -0.6
Jacksonville 50-52-1 49.0% 51.0% +0.9
Houston 45-53-1 45.9% 54.1% +0.8