Oklahoma, Oklahoma State and Missouri are the only teams still undefeated halfway through the final season of the Big 12 as know it.
That unblemished trio will be reduced to two — maybe one — by next weekend. The Sooners, Cowboys and Tigers are all 6-0 overall, and the only teams without a Big 12 loss.
Oklahoma, No. 1 in the BCS standings, goes to Missouri on Saturday. Oklahoma State is home against Nebraska (5-1), the preseason North Division favorite whose chance for a spotless farewell is already done.
Nebraska and Colorado are leaving the Big 12 after this season.
The Cornhuskers are coming off a loss to Texas (4-2), which ended a two-game losing streak but still has fewer wins than Baylor (5-2).