Singleton came to Oklahoma State from his alma mater, the Air Force Academy, where he had served as run game coordinator for four seasons and had been on the staff for 11 years starting as an assistant for the prep school team and rising up the ranks.
Singleton is the son of a retired Air Force sergeant and was a three-year letterman as a running back, a co-captain on the 1998 Air Force team, and he earned honorable mention All-WAC honors that final season.
In his time at Oklahoma State, he has coached the likes of Joe Randle, Desmond Roland, and Tyreek Hill to successful seasons. One of the best attributes of his running backs at both Oklahoma State and previously at the Air Force was the lack of fumbles. Ball security has been a strong trait of Singleton-coached running backs.
With Singleton departing, Gundy is now looking to fill an offensive line position, a multiple position that could possibly include assisting with the offensive line and coaching tight ends, and now running backs coach.
Offensive coaches currently on staff include Mike Yurcich (offensive coordinator and quarterbacks) and Kasey Dunn (wide receivers).
The defensive staff is set with Glenn Spencer (defensive coordinator and linebackers), Joe Bob Clements (defensive line), Tim Duffie (safeties), and Dan Hammerschmidt (cornerbacks).