What is every Big Ten Conference team's record against the over/under line as a road underdog since the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Ohio St 1-0-0 100.0% 0.0% +8.0
Michigan 6-2-0 75.0% 25.0% +5.2
Indiana 17-13-0 56.7% 43.3% +2.8
Nebraska 14-14-0 50.0% 50.0% +1.7
Maryland 15-16-0 48.4% 51.6% +0.3
Penn St 6-7-0 46.2% 53.9% +2.3
Illinois 17-20-1 46.0% 54.1% +1.2
Northwestern 13-16-2 44.8% 55.2% -1.7
Minnesota 12-16-0 42.9% 57.1% -1.3
Wisconsin 3-4-0 42.9% 57.1% +0.1
Iowa 8-13-0 38.1% 61.9% -5.5
Purdue 11-18-1 37.9% 62.1% -4.1
Michigan St 10-17-0 37.0% 63.0% -2.3
Rutgers 12-26-0 31.6% 68.4% -2.1