Big 12 football schedule 2021: Steve Sarkisian's debut at Texas, Red River Showdown highlight slate | CBS Sports Headlines Big 12 football schedule 2021: Steve Sarkisian's debut at Texas, Red River Showdown highlight slate Baylor and Kansas will kick off the 2021 Big 12 conference season on Sept. 18 ESN … Continue reading Big 12 football schedule 2021: Steve Sarkisian's debut at Texas, Red River Showdown highlight slate