The Coaches Poll puts Oklahoma at #9, and six spots ahead of Oklahoma State. Texas A&M is way back at #18. Meanwhile, the Harris Poll gives Oklahoma an even bigger lead at #9, with Oklahoma State seven spots back. Texas A&M is still a distant finisher.
Why does this matter? Since there is a three-way tie for the Big 12 South, the tiebreaker goes to BCS Rankings. With 2/3 of the BCS formula in, the Sooners hold a 0.207 point lead over Oklahoma State, and a 0.285 point lead over Texas A&M. The average of the human polls gives the Sooners about 0.637 BCS points so far.
Since the computers are just a third of the BCS, Oklahoma State or Texas A&M would need to double their point deficits to wind up being ranked ahead of the Sooners. This is just about mathematically impossible for Oklahoma State, and especially Texas A&M.
Punch your tickets to Dallas.