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The officials flag Dallas Cowboys cornerback Benny Barnes (31) for a controversial interference call on Pittsburgh Steelers Hall of Fame wide receiver Lynn Swann (88) during Super Bowl XIII, a 35-31 Steelers victory on January 21, 1979, at the Orange Bowl in Miami, Florida. (Photo by Nate Fine/Getty Images)

The officials flag Dallas Cowboys cornerback Benny Barnes (31) for a controversial interference call on Pittsburgh Steelers Hall of Fame wide receiver Lynn Swann (88) during Super Bowl XIII, a 35-31 Steelers victory on January 21, 1979, at the Orange Bowl in Miami, Florida. (Photo by Nate Fine/Getty Images)

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MIAMI - JANUARY 21: Football legend George Halas conducts the pre-game coin toss before Super Bowl XIII at the Orange Bowl on January 21, 1979 in Miami, Florida. The Steelers defeated the Cowboys 35-31. (Photo by Focus on Sport via Getty Images)

MIAMI - JANUARY 21: Football legend George Halas conducts the pre-game coin toss before Super Bowl XIII at the Orange Bowl on January 21, 1979 in  Miami, Florida. The Steelers defeated the Cowboys 35-31. (Photo by Focus on Sport via Getty Images)

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MIAMI, FL - JANUARY 21: Lynn Swann #88 of the Pittsburgh Steelers celebrates after he scored a touchdown 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:  Lynn Swann #88 of the Pittsburgh Steelers celebrates after he scored a touchdown 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)