Franco Harris (32) of the Pittsburgh Steelers eludes tackle by Jimmy Warren of the Oakland Raiders on a 42-yard run to score the winning touchdown in the American Conference playoff game in Pittsburgh, Sunday, Dec. 23, 1972. Harris' "Immaculate Reception" came when a desperation pass to a teammate bounced off a Raiders defender. The touchdown gave Pittsburgh a 13-7 lead with five second left in the game. (AP Photo/Harry Cabluck)

Pittsburgh Steelers' Franco Harris runs into the end zone to score early in third quarter action of Super Bowl IX against Minnesota Vikings at Tulane Stadium in New Orleans, La., Jan. 12, 1975. Pursuing Harris is Jackie Wallace (25) of the Vikings. (AP Photo)

Pittsburgh Steelers' Mel Blount (47) indicates No. 1 as he and teammates Joe Greene (75) and Andy Russell (34) leave field after stopping Minnesota Vikings attack during Super Bowl game in Tulane stadium in New Orleans on Sunday, Jan. 13, 1975. Steelers won, 16-6. (AP Photo/HC)

Ernie Holmes, defensive tackle for the Pittsburgh Steelers, goes for the camera during a picture session prior to the teams workout for the Super Bowl in New Orleans on Jan. 8, 1975. (Associated Press)

Pittsburgh Steelers' Lynn Swann dives as he catches a pass from quarterback Terry Bradshaw during Super Bowl X action held at the Orange Bowl in Miami, Florida Jan. 18, 1976 against the Dallas Cowboys. (AP Photo)

A happy Pittsburgh coach, Chuck Noll, leaves the field with Jim Allen (45) who holds up his finger indicating the Steelers are No. 1 after defeating the Dallas Cowboys 21-17 in Super Bowl X at the Orange Bowl in Miami, January 18, 1976. (AP Photo/Phil Sandlin)

Pittsburgh Steelers Jack Ham (59) tackles Doug Dennison of the Cowboys after catching a pass in the Super Bowl X game in Miami, Fl., on Jan. 19, 1976. At left is Steelers' J.T. Thomas. (AP Photo/Phil Sandlin)

Pittsburgh Steelers linebacker Jack Lambert manages a gap-toothed smile during a sideline break in Sunday's Super Bowl XIV meeting with the Los Angeles Rams in Pasadena, Calif., Jan. 21, 1980. (AP Photo/Rusty Kennedy)

Pittsburgh Steelers coach Chuck Noll and his quarterback Terry Bradshaw pose for photographers in Miami, during a picture day session, Jan. 13, 1976. (AP Photo/Phil Sandlin)

Pittsburgh Steelers cornerback Mel Blount, the bad boy of last year's Super Bowl, readies his fingers to grab Oakland receiver Cliff Branch in the playoff rematch between Pittsburgh and the Raiders on Jan. 2, 1976, in Pittsburgh. (AP Photo/Harry Cabluck)

Pittsburgh Steelers running back Franco Harris (32) carries ball as quarterback Terry Bradshaw (12) and Sidney Thornton (38) raise their arms in victory after Harris scored their final touchdown in fourth quarter in NFL football's Super Bowl XIV in Pasadena, Calif. on Jan. 20, 1980. The Steel Curtain dynasty concluded as Bradshaw completed 14 of 21 passes for 309 yards and set two passing records as the Steelers became the first team to win four Super Bowls. (AP Photo/File)

Pittsburgh Steelers running back Rocky Bleier (20) tries to elude Los Angeles Rams safety Dave Elmendorf (42) during an NFL Super Bowl XIV game at the Rose Bowl on January 20, 1980. The Steelers defeated the Rams 31-19. (Peter Read Miller via AP)

Pittsburgh Steelers wide receiver John Stallworth (82) is seen in action during Super bowl XIII Jan. 21, 1979, at the Orange Bowl in Miami. The Pittsburgh Steelers defeated the Dallas Cowboys 35–31. (Tony Tomsic via AP)

Pittsburgh Steelers coach Chuck Noll holds Super Bowl trophy aloft before fans who greeted the team at Pittsburgh airport on its return from New Orleans 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. (AP Photo)

Pittsburgh Steelers fullback Franco Harris (32) is seen in action during Super bowl IX Jan. 12, 1975, in New Orleans. Steelers defeated the Minnesota Vikings 16-6. (Tony Tomsic via AP)

Pittsburgh Steelers coach Chuck Noll smiles as he watches his team play to a 16-6 victory over the Minnesota Vikings during the Super Bowl IX game at Tulane Stadium in New Orleans, La., on Jan. 12, 1975. At right is Joe Gilliam (17). (AP Photo)

Pittsburgh Steelers quarterback Terry Bradshaw sits on the bench as the rest of his team watches the closing minutes of the XIII Super Bowl, in Miami, Fla, on January 21, 1979. The Steelers defeated the Dallas Cowboys 35-31. (AP Photp/Harry Cabluck)

Pittsburgh Steelers' Sidney Thornton (38), Rocky Bleier (20), Terry Bradshaw (12) and Randy Grossman (84) congratulate themselves after whipping the Houston Oilers, 27-13, in AFC championship game, Sunday, Jan. 6, 1980 at Pittsburgh. The Steelers will play in the Super Bowl against the winner of the Los Angeles and Tampa Bay NFC game. (AP Photo)

Pittsburgh Steelers Hall of Fame running back Franco Harris, Hall of Fame quarterback Terry Bradshaw, Hall of Fame wide receiver Lynn Swann, and Hall of Fame cornerback Mel Blount celebrate Harris' touchdown in a 31-19 win over the Los ngeles Rams in Supe Super Bowl XIV - Los Angeles Rams vs Pittsburgh Steelers - January 20, 1980 (National Football League)

Pittsburgh Steelers wide receiver Lynn Swann goes up to make a ,catch over Dallas Cowboys cornerback Mark Washington in the Steelers 21-17 win over the Cowboys in Super Bowl X on January 18, 1976 at the Orange Bowl in Miami, Florida. (National Football League)

Pittsburgh Steelers defensive end L.C. Greenwood (68) and Hall of Fame defensive end Joe Greene (75) smile as they leave the field during an NFL game against the Philadelphia Eagles, Nov. 3, 1974. The Steelers shutout the Eagles 27-0 at Three Rivers Stadium. (National Football League)

Pittsburgh Steelers quarterback Terry Bradshaw drops back to pass against the Dallas Cowboys in Super Bowl X on January 18, 1976 at the Orange Bowl in Miami, Florida. (AP Photo/Vernon Biever)

Pittsburgh Steelers defensive end Dwight White (78), defensive tackle Ben McGee (60), Hall of Dame defensive tackle Joe Greene (75) and Hall of Fame defensive end L.C. Greenwood (68) during an NFL game in Pittsburgh, Nov. 26, 1972. The Steelers defeated the Vikings 23-10. (National Football League)

"Mean" Joe Greene (75), left tackle for the Pittsburgh Steelers takes a short cut across Blaine Nye (61) guard for the Dallas Cowboys to put a sudden halt on Walt Garrison (32), at Irving, Texas, Oct. 8, 1972. The play picked up two yards in the first quarter of play between the Steelers and the Cowboys. (AP Photo/Ferd Kaufman)

Terry Bradshaw, left, Pittsburgh Steelers quarterback, gets a hug from reserve quarterback Terry Hanratty in the dressing room after the Steelers defeated the Oakland Raiders 13-7 in the American Conference playoff game in Pittsburgh, Pa., Dec. 23, 1972. Hanratty threw the winning pass that was tipped by an Oakland defenseman and caught by Franco Harris of the Steelers for a touchdown in closing minutes of the game. (AP Photo)