The Big 12 championship is still solidly in reach for No. 12 Oklahoma State, which showed Saturday just what No. 4 Baylor will be up against next week. They did it by clobbering No. 23 Texas - and in a fashion that no team has ever done here against Mack Brown. Quarterback Clint Chelf ran for two touchdowns and threw for two more, and the Cowboys beat the Longhorns 38-13 to hand Brown his worst home loss in 16 seasons. It comes at a time when speculation about Brown's job security had just started quieting down following a bumbling start this season for the Longhorns.