No. 6 Oklahoma (11-1, 8-1, No. 6 CFP) vs. No. 8 Baylor (11-1, 8-1, No. 7), at Arlington, Texas, Saturday at 11 a.m. CST (ABC). Line: Oklahoma by 9. Series record: Oklahoma leads 26-3. WHAT’S AT STAKE? Possibly a spot in the four-team College Football Playoff. Oklahoma is going for its fifth Big 12 title in a row, and is trying to get to the playoff for the fourth time in that span. Baylor…