Emmitt James Smith III is an American former football running back who played in the National Football League (NFL) for 15 seasons, 13 as a member of the Dallas Cowboys and 2 seasons with the Arizona Cardinals. Among other accolades, he is the league's all-time leading rusher.

A running back (RB) is a member of the offensive backfield in gridiron football. The primary roles of a running back are to receive handoffs from the quarterback to rush the ball, to line up as a receiver to catch the ball, and block. There are usually one or two running backs on the field for a given play, depending on the offensive formation. A running back may be a halfback, a wingback or a fullback. A running back will sometimes be called a "feature back" if he is the team's key player/more prominent running back.