Oklahoma quarterback Baker Mayfield's status is uncertain for Saturday's showdown with Oklahoma State.
Mayfield was injured during Saturday's 30-29 win over TCU. He was shaken up early in the second quarter by a helmet-to-helmet hit from TCU linebacker Ty Summers, who was ejected for targeting.
The fifth-ranked Sooners (10-1, 7-1 Big 12) can clinch the conference title with a victory over the ninth-ranked Cowboys (10-1, 7-1). Oklahoma coach Bob Stoops said Mayfield will be evaluated this week by medical staff before a decision is reached.
Mayfield rose on Heisman Trophy watch lists after leading the Sooners to victory at Baylor the previous week.