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MIAMI, FL - JANUARY 21: Joe Greens #75 and Jack Ham #59 of the Pittsburgh Steelers pursues the play against the Dallas Cowboys during Super Bowl XIII on January 21, 1979 at the Orange Bowl in Miami, Florida. The Steelers won the Super Bowl 35-31. (Photo by Focus on Sport/Getty Images)

MIAMI, FL - JANUARY 21:  Joe Greens #75 and Jack Ham #59 of the Pittsburgh Steelers pursues the play against the Dallas Cowboys during Super Bowl XIII on January 21, 1979 at the Orange Bowl in Miami, Florida. The Steelers won the Super Bowl 35-31. (Photo by Focus on Sport/Getty Images)