Josh Heupel coached and played at Oklahoma before he became Tennessee's coach. Here's why he was fired at his alma mater after 2014:

The last two times these programs played was in 2015 when Baker Mayfield led a come-from-behind victory at Neyland Stadium to kick off the Sooners' first trip to the College Football Playoff. The win helped usher in a period of six straight 11-win seasons, pandemic year aside, and elevate the Sooners back to the top tier of college football.