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:

Tennessee coach Josh Heupel returned home to Oklahoma with a heavy heart and his eyes on a promising future for his title-chasing Volunteers

Josh Heupel’s return to Norman this past weekend was special for several reasons. For one, the Tennessee head coach quarterbacked Oklahoma to a national title in 2000, served as a graduate assistant for the Sooners in 2004 and ultimately spent nine additional years on staff from 2006-14,