GAINESVILLE, Fla. — The gravity of the moment wasn’t lost on Jason Witten .

He enjoyed a storied career as a tight end, but Saturday represented a change to kickstart his coaching career in his first game as Oklahoma‘s interim offensive coordinator.

“After this long week, I was coming in today and the 18-wheeler was out front when we were coming in,” Witten said after the 23-7 win . “And I was walking and I saw seven national championships. Fifty conference championships on the back of the 18-wheeler. And I just kind of smiled because I've been on the big stages, the biggest of stages, and I know what the expectation is here at Oklahoma.”

Witten was handed the keys Monday after OU fired Ben Arbuckle . He wasted no time rallying the troops.

“I told the players in their first meeting as an offensive group was just, 'Hey, look this is not ideal.…