What is every Big 12 Conference team's record against the over/under line as an underdog in the 2018 season?

Definitions
Team Over Record Over % Under % Total +/-
TX Christian 4-0-0 100.0% 0.0% +7.3
Texas Tech 5-2-0 71.4% 28.6% +0.8
Oklahoma St 3-2-0 60.0% 40.0% +7.4
W Virginia 1-1-0 50.0% 50.0% +6.5
Kansas 4-6-0 40.0% 60.0% -1.2
Texas 2-3-0 40.0% 60.0% +6.3
Baylor 3-5-0 37.5% 62.5% +0.3
Iowa St 2-5-0 28.6% 71.4% -4.9
Kansas St 2-6-1 25.0% 75.0% -5.9
Oklahoma 0-1-0 0.0% 100.0% -1.5