What is every Big 12 Conference team's record against the over/under line as an underdog since the 2014-2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Iowa State 52-27-1 65.8% 34.2% +5.2
Baylor 38-25-3 60.3% 39.7% +1.5
Kansas St 47-44-1 51.6% 48.4% +0.8
Oklahoma St 48-48-2 50.0% 50.0% +0.9
TX Christian 47-48-1 49.5% 50.5% +1.7
Texas Tech 34-38-1 47.2% 52.8% -0.9
Kansas 14-16-0 46.7% 53.3% -1.3
Texas 41-47-1 46.6% 53.4% -0.2
W Virginia 24-31-1 43.6% 56.4% -1.4
Oklahoma 30-46-1 39.5% 60.5% -2.9