Green Bay Packers quarterback Bart Starr (#15 at left) digs his face across the goal line to score the winning touchdown against the Dallas Cowboys to bring the Packers their third consecutive NFL championship, in Green Bay, Wisc., in this Dec. 31, 1967 file photo. (AP Photo)

Dallas Cowboys quarterback Don Meredith (17), white jersey at center, falls back on top of a Green Bay Packers player as players chase a fumble during the NFL Championship game at Lambeau Field in Green Bay, Wisc., in this Dec. 31, 1967. (AP Photo)

Green Bay Packers head coach Vince Lombardi looks worried during his team's 34-27 win over the Dallas Cowboys on Jan. 1 1967, in the NFL Championship game. (AP Photo)

Green Bay Packers Elijah Pitts (22) looks for a way to run as Dallas Cowboys linebacker Lee Roy Jordan (55) grabs him from behind during the NFL Championship Jan. 1, 1967 in Dallas. The Packers defeated the Cowboys, 34-27. (AP Photo)

Green Bay Packers Hall of Fame quarterback Bart Starr in a action in a 21-17 win over the Dallas Cowboys in a NFC Championship game on December 31, 1967 at Lambeau Field in Green Bay, Wisconsin. 1967 NFL Championship Game - Dallas Cowboys vs Green Bay Packers - December 31, 1967 (National Football League)

Green Bay Packers Jim Taylor runs with a Bart Starr pass as Dallas Cowboys Mel Renfro (20) leaps high in air too late to break up the pass during the NFL Championship game, Jan. 1, 1967 in Dallas, Tx. At left is Cowboys Chuck Howley (54). The Packers defeated the Cowboys 34-27. (AP Photo)

Dallas Cowboys coach Tom Landry shouts to his players on the field during the NFL Championship game with Green Bay Packers in Dallas today January 1, 1967. Harold Hays (56) halfback and another Cowboy players reflect the tenseness of the game which Green Bay won, 34-27. (AP Photo)

Green Bay Packers Chuck Mercein receives words of congratulation from coach Vince Lombardi after the Packers won their third successive NFL title, Jan. 2, 1967 in Green Bay, Wis., by beating the Dallas Cowboys, 21-17. Mercein joined the team during mid-season to reinforce the injury-riddled backfield. (AP Photo/Paul Shane)

Packer Coach Vince Lombardi, right, explains how the Green Bay stadium "electric blanket" is keeping the playing surface soft for Sunday's NFL championship game against Dallas Cowboys on Dec. 28, 1967 in Green Bay, Wisconsin. Buried electric heating cables provide the heat. (AP Photo/Paul Shane)

His face wreathed with steam from his breath, Green Bay Packers quarter Bart Starr calls signals in bitter cold as he led the Packers to a 21-14 win over the Dallas Cowboys to capture third consecutive National Football League title, Dec. 31, 1967 in Green Bay. Starr tossed two touchdown passes and scored the winning touchdown himself with seconds to play in the game at Green Bay. (AP Photo)

Boyd Dowler (86) of the Green Bay Packers grabs a Bart Starr touchdown pass against Mel Renfro of the Dallas Cowboys in the NFL championship game at Green Bay, Wi., on Dec. 31, 1967. The "Ice Bowl," played in frigid temperatures, was won by the Packers 21-17. (AP Photo)

Dallas Cowboys defensive end George Andrie picks up a Bart Starr fumble and is about to follow teammate Jethro Pugh (75) into the end zone to score in the NFL Championship game against the Green Bay Packers, Dec. 31, 1967. This game took place in Green Bay, Wis. Played in sub-zero temperatures the contest was later dubbed 'The Ice Bowl.' (AP Photo/files)

After picking up the ball fumbled by Green Bay Packers quarterback Bart Starr, Dallas Cowboys defensive end George Andrie (66) follows teammate Jethro Pugh (75) over the goal line to score in second quarter of the NFL championship game on December 31, 1967 at Green Bay. (AP Photo)