Super Bowl IX Program cover. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

A ticket for Super Bowl IX between the Pittsburgh Steelers and Minnesota Vikings on January 12, 1975 at Tulane Stadium in New Orleans, LA. (Associated Press/NFL Photos)

Pittsburgh Steelers Super Bowl IX ring, 1974 NFL Super Bowl Rings (Associated Press/NFL Photos)

This is the scene prior to the start of Super Bowl IX, matching the Pittsburgh Steelers against the Minnesota Vikings at Tulane Stadium in New Orleans, La., Jan. 12, 1975. (Boone/Associated Press)

An aerial view of Tulane Stadium, in New Orleans, Louisiana during Super Bowl IX on January 12, 1975. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

Fans of the Pittsburgh Steelers cheer on their team during a 16-6 win over the Minnesota Vikings in Super Bowl IX on January 12, 1975 at Tulane Stadium, in New Orleans, Louisiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

Minnesota Vikings Hall of Fame quarterback Fran Tarkenton goes back to pass in a 16-6 loss to the Pittsburgh Steelers in Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Louisiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

Pittsburgh Steelers defensive tackle Joe Greene leads out his team at the beginning of a 6-6 win over the Minnesota Vikings in Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Louisiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975 (Associated Press/NFL Photos)

Pittsburgh Steeler Hall of Fame running back Franco Harris on a run in a 16-6 win over the Minnesota Vikings in Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Loiusiana. Harris won MVP for the game with a Super Bowl record rushing fo Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975 (Associated Press/NFL Photos)

Pittsburgh Steeler Hall of Fame running back Franco Harris (32) on a run in a 16-6 win over the Minnesota Vikings in Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Louisiana. Harris won MVP for the game with a Super Bowl record rushing for Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975 (Associated Press/NFL Photos)

Minnesota Vikings' quarterback Fran Tarkenton (10) fumbles the ball, then chases it and falls on it in the end zone for a Pittsburgh Steelers safety during second quarter of Super Bowl IX, Jan. 12, 1975, in New Orleans. Steelers went on to win, 16-6. (Jack Thornell/Associated Press)

Grambling State University Tiger marching band play in pregame festivities before Super Bowl IX where the Minnesota Vikings played to a 16 to 6 loss to the Pittsburgh Steelers on January 12, 1975 at Tulane Stadium in New Orleans, Louisiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975 (Associated Press/NFL Photos)

Minnesota Vikings Hall of Fame quarterback Fran Tarkenton awaits the snap and calls signals in a 16-6 loss to the Pittsburgh Steelers in Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Loiusiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

Minnesota Vikings guard Andy Mauer (66) leads running back Chuck Foreman (44) as he takes a handoff from Hall of Fame quarterback Fran Tarkenton (10) during an NFL Super Bowl IX game against the Pittsburgh Steelers in New Orleans on January 12,1975. The Steelers defeated the Vikings 16-6 . (AP Photo/Vernon Biever)

Pittsburgh Steelers' quarterback Terry Bradshaw (12) is caught and thrown for a loss by Vikings' tackle Alan Page during the first quarter of Super Bowl IX, Jan. 12, 1975, in New Orleans. (Phil Sandlin/Associated Press)

Mardi Gras Chorus performs during halftime of Super Bowl IX on January 12, 1975 at Tulane Stadium in New Orleans, Louisiana. Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)

Pittsburgh Steelers' Franco Harris gains yardage on his way to setting a new Super Bowl rushing record during Super Bowl IX against the Minnesota Vikings, Jan. 12, 1975, in New Orleans. Harris gained 159 yards on 34 carries. Steelers won 16-6. (Jack Thornell/Associated Press)

Minnesota Vikings' Matt Blair (59) goes high to block the kick by Pittsburgh Steelers' Bobby Walden (39) during the fourth quarter of Super Bowl IX, Jan. 12, 1975, in New Orleans. Ball was recovered by Terry Brown, who took it into the end zone for the Vikings' only score. Other Vikings are Doug Kingsriter (89) and Jeff Wright (23). (Jack Thornell/Associated Press)

Pittsburgh Steelers coach Chuck Noll holds Super Bowl trophy aloft before fans who greeted the team at Pittsburgh airport on its return from New Olreans Monday, Jan. 13, 1975. The Steelers won the first National Football League Championship in their 42 year history by defeating the Minnesota Vikings, 16-6 in Super Bowl IX on Sunday. (Associated Press)

NFL commissioner Pete Rolzelle, Art Rooney Sr., Chairman of the board for the Pittsburgh Steelers, Steelers head coach Chuck Noll, and NBC announcer Charlie Jones together in the Steelers locker room as Rooney receives the Vince Lombardi trophy after his Super Bowl IX - Pittsburgh Steelers vs Minnesota Vikings - January 12, 1975. (Associated Press/NFL Photos)