Kendre Miller rushed for 138 yards, including a 75-yard touchdown in the third quarter that broke open a tense defensive struggle, and No. 4 TCU beat No. 18 Texas 17-10 to clinch a berth in the Big 12 championship game.
Trey Wolff kicked a 20-yard field goal in overtime to give Texas Tech a wild 37-34 victory over No. 22 Texas.
Will Reichard kicked a 33-yard field goal with 10 seconds left, and No. 1 Alabama overcame a stifling defensive effort by Texas to earn a hard-fought 20-19 victory.
Texas freshman quarterback Quinn Ewers has left the field after taking a hard fall on his left shoulder at the end of the first quarter against No. 1 Alabama.
The Big 12 is going into its final season as a 10-team league.
Nebraska has not officially named its starting quarterback but all indications point to it being Texas transfer Casey Thompson.
Steve Sarkisian has yet to make his debut in the Big 12, but the new Texas coach was asked on Thursday to ponder life in his next league, the Southeastern Conference.