Arizona State running backs coach Bo Graham has resigned, according to a source. Arizona State promoted graduate assistant Josh Martin to fill Graham's role.
Graham was entering his fourth season with the Sun Devils, coaching running backs for the past two after serving as the on-campus recruiting coordinator for his first year. He is the son of Arizona State head coach Todd Graham.
Before arriving at Arizona State, Bo Graham spent the 2011 season as a graduate assistant and assistant wide receivers coach at Pitt. That followed a one-year stint as the offensive coordinator at Central High School in Tulsa, Okla., and a two-year run as Tulsa's running backs coach.
Graham also served as a coordinator of skill and development at Rice for one season and spent three seasons working with Tulsa's secondary as a student assistant coach.
The Sun Devils went 10–3 last season, their second consecutive season with double-digit wins. They return 16 starters, including Foster and Richard, and are considered strong contenders in the Pac-12 South after finishing second in the division in 2014.