Ex-Houston head coach just finished his first season as co-offensive coordinator/special teams coordinator/tight ends coach.
Jennings was dismissed in November after going on a profanity-laced social-media tirade aimed at the coaching staff.
This marks a return to Boulder for the 13-year NFL veteran.
The two schools were members of the now-defunct Big East conference.
Mayfield is first Oklahoma QB to claim award named in honor of Archie, Peyton and Eli.