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

Definitions
Team Over Record Over % Under % Total +/-
Michigan 39-27-1 59.1% 40.9% +0.7
Ohio St 43-33-0 56.6% 43.4% +2.9
Penn St 60-49-1 55.1% 45.0% +3.0
Iowa 45-40-1 52.9% 47.1% +2.3
Nebraska 71-64-1 52.6% 47.4% +1.2
Illinois 33-34-1 49.3% 50.8% +0.9
Michigan St 27-28-0 49.1% 50.9% +1.8
Minnesota 63-66-3 48.8% 51.2% +0.3
Maryland 42-49-1 46.2% 53.9% -1.9
Indiana 40-48-3 45.5% 54.6% -1.6
Rutgers 49-59-2 45.4% 54.6% -0.2
Northwestern 51-62-3 45.1% 54.9% +0.5
Wisconsin 37-47-1 44.1% 56.0% -0.4
Purdue 17-22-0 43.6% 56.4% +0.3