WACO, Texas -- Baylor quarterback Bryce Petty is expected to start against No. 12 Kansas State despite suffering a concussion in Saturday's win over Texas Tech.

Petty has not undergone concussion testing and hasn't yet been formally cleared to play, but coach Art Briles said he anticipates Petty will be available.

"He was here yesterday and feeling pretty good," Briles said. "I just saw him 10 minutes ago and he's fine. Smile on his face and determination in his heart."

Petty exited Baylor's eventual 48-46 win in the third quarter after taking a hit under his chin and did not return. Backup quarterback Seth Russell, who's started one game this season, finished the game.

On Monday, Petty said he woke up with a slight headache but believes his symptoms are "definitely decreasing." He'll undergo standard concussion testing once he is deemed symptom-free.

"I feel great," Petty said. "Woke up this morning and just happy to be alive and be breathing. You can't ask for much more than that."

Petty has dealt with a back injury this season but has no prior history of concussions in his college career. The 10-1 Bears are playing for the Big 12 championship and potentially a College Football Playoff berth.

If Petty experiences any setbacks before Saturday, Briles said he's confident Russell can get the job done against the Wildcats.

"He got in the game in tense situations Saturday and he did some good things for us down the stretch," Briles said, "when we had to make first downs and control the clock a little bit, go down and get points on the board."