Josh Heupel’s last game with Oklahoma’s ‘OU’ logo on his chest was a 40-6 to Clemson in the Russell Athletic Bowl two days before New Year’s in 2014. A frustrating end to a frustrating 8-5 season for the Sooners, which included five losses over their final nine games. There was a difference of opinion on offensive style, with head coach Bob Stoops wanting one thing and Heupel and Jay Norvell, his co-offensive coordinators, wanting something else. A week later, Stoops said at a press conference that Heupel wouldn’t be back. The All-American transfer quarterback and Heisman Trophy runner-up, the…