Robert J. Barber (born December 26, 1951) is an American former professional football player who was a defensive end for the Green Bay Packers of the National Football League (NFL). Barber played college football for the Grambling State Tigers before being selected by the Pittsburgh Steelers in the second round of the 1975 NFL draft. The Steelers subsequently traded him to the Packers. Barber played in the NFL for four seasons and retired in 1979.