Bumpas, 65, has been the Horned Frogs' defensive coordinator since 2004. He has worked with TCU head coach Gary Patterson at five different schools -- TCU, Kansas State, Tennessee Tech, Utah State and Navy.
At TCU, Bumpas was a Broyles Award finalist three times and led a Horned Frogs defense that finished No. 1 in total defense in three straight seasons from 2008-10.
In 2014, TCU finished 12-1 and defeated Ole Miss 42-3 in the Peach Bowl, ending the season with the No. 8 scoring defense (19.0 points allowed per game) and No. 18 total defense (341.8 yards allowed per game).
Bumpas played defensive tackle at Arkansas, finishing as the Southwest Conference defensive player of the year in 1970 and also earning consensus All-American honors.
A timetable for the search for his replacement has not been announced.
- Mike Fiammetta