Arizona State running backs coach Bo Graham -- the son of head coach Todd Graham -- resigned for personal reasons Monday.
The ASU athletic department had no other immediate comment. Bo Graham did not respond to a phone call or text message. His departure is not believed to be an NCAA matter. Nor did Tempe Police have an arrest record under Graham's name.
Todd Graham was not immediately available to comment.
Bo Graham was in his third season as ASU's running backs coach.He also spent one season as the program's on-campus recruiting coordinator. Graham attended Saturday's practice, but was not at Monday's session.