A player-coach is unable to become a assistant coach.
Patrick Graham ( born January 24 , 1979 ) is an American football coach who is the defensive line coach for the New York Giants of the National Football League ( NFL ) . A player-coach ( also playing coach , captain-coach , or player-manager ) is a member of a sports team who simultaneously holds both playing and coaching duties . A player-coach may be a head coach or an assistant coach .