Robert "Woody" Widenhofer (January 20, 1943 – March 22, 2020) was a college football head coach and longtime assistant coach in the National Football League (NFL). Widenhofer is best known for helping the Pittsburgh Steelers "Steel Curtain" defense that won four Super Bowls in the 1970s. He later served unsuccessful tenures as head coach at the University of Missouri and Vanderbilt University.