Defensive end Keenan Graham was often used as a blocker in the “PAC” formation that featured freshman linebacker Myles Jack at tailback. The senior said the look, which offensive coordinator Noel Mazzone came up with this week, flustered Arizona’s defense.

“I was looking at the faces of the defensive players,” Graham said. “Some of them didn’t know what was going on. They didn’t know what to check to. They were overwhelmed.”