Groce kept alive Yukon's next drive with a 9-yard first-down run on a fake punt. Caleb Davis sped 27 yards to the Norman 2-yard line. Somerville finished the possession with a 2-yard touchdown strike to Parker Bohannan. Yukon had a 21-13 advantage with 6:39 remaining.
Norman had knocked Yukon out of the 2012 playoffs with a 38-13 first-round triumph.
“I'm proud of this team,” Yukon coach Todd Wilson said. “That's a good football team. They beat a couple of good teams. It was big for the program. Tonight our defense got us off the field. It was a great stand by our defense. We had a great plan to stop a good rushing offense. I was really proud.”
Norman used timely defense and Dean's legs to produce a 10-0 advantage at 8:32 left in the second quarter.
Norman's Gavin Nadeau plucked Somerville's pass at the Yukon 27-yard line, returning the interception to the 20. Norman cashed in the takeaway for a Matt Hockett 42-yard field goal late in the first quarter.
Dean executed the zone read, hiding the ball in his running back's belly and taking off on a 58-yard scoring run for Norman's 10-0 lead.
Yukon responded with Davis' 66-yard touchdown dash with 7:27 to go in the first half.