What happened: Oklahoma has made a midseason change at offensive coordinator, parting ways with Ben Arbuckle. Former Dallas Cowboys tight end Jason Witten takes over the unit after working on staff as Oklahoma's tight ends coach.

Why it matters: The promotion elevates Witten into his first offensive coordinator role following a long NFL career with Dallas. Oklahoma reshuffles its coaching responsibilities as the program navigates the second half of the college football regular season.

What to watch: Witten will make his play-calling debut in the Sooners' upcoming regular-season contest.