Oklahoma has fired offensive coordinator Ben Arbuckle after less than two seasons, sources told ESPN's Pete Thamel on Monday.
Tight ends coach Jason Witten is expected to be the interim offensive coordinator and play caller, sources said.
The Sooners, who dropped to 4-4 after a 42-25 home loss to South Carolina on Saturday, rank next to last in the SEC in yards per game and touchdowns scored.
Arbuckle came to Norman after two successful seasons at Washington State where he was the youngest primary coordinator in the Power 4 at the time (age 27). His quarterback with the Cougars, John Mateer, transferred to Oklahoma the same month Arbuckle was hired.