What is every Independent I-A team's record against the over/under line as an underdog since the 2018 season?

Definitions
Team Over Record Over % Under % Total +/-
U Mass 32-21-0 60.4% 39.6% +5.3
Connecticut 25-23-2 52.1% 47.9% +1.1
Army 14-15-0 48.3% 51.7% +2.0
BYU 13-14-0 48.2% 51.9% +1.0
Notre Dame 7-8-0 46.7% 53.3% -2.0
N Mex State 20-25-0 44.4% 55.6% +1.0
Liberty 8-17-0 32.0% 68.0% -7.4