What is every Big 12 Conference team's record against the over/under line as an underdog since the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Oklahoma 5-2-0 71.4% 28.6% +12.4
Texas Tech 26-15-1 63.4% 36.6% +4.4
TX Christian 12-10-0 54.5% 45.5% +1.9
Kansas 31-27-1 53.4% 46.6% +0.9
Kansas St 20-26-1 43.5% 56.5% +1.1
Iowa State 17-23-1 42.5% 57.5% -3.1
W Virginia 9-15-2 37.5% 62.5% -1.6
Baylor 11-19-0 36.7% 63.3% -1.3
Oklahoma St 8-14-0 36.4% 63.6% -2.4
Texas 11-21-0 34.4% 65.6% -2.5