they all play each other in the next couple of weeks:
TCU
Baylor
Oklahoma
Okie State

Food for thought:
TCU has Okie State & Oklahoma on the road, & Baylor at home.
Baylor has Oklahoma at home, but Okie State & TCU on the road.
Oklahoma has Okie State & TCU at home, but Baylor on the road.
Okie State has all 3 at home.