What happened: Oklahoma head coach Brent Venables announced that tight ends coach Jason Witten will take over as offensive coordinator and primary play-caller for the remainder of the season. Witten steps into the elevated role following the dismissal of former coordinator Ben Arbuckle.

Why it matters: The promotion hands play-calling responsibilities to the former Dallas Cowboys tight end as the Sooners seek midseason stability on offense. Oklahoma reshuffles its staff amid a pivotal stretch in conference play to spark production down the stretch.

What to watch: Witten will make his collegiate play-calling debut in Oklahoma's upcoming regular-season matchup.