In 1970, the AFL was absorbed into the NFL and the league reorganized with the ten AFL franchises along with three existing NFL teams: the Baltimore Colts, the Cleveland Browns, and the Pittsburgh Steelers, becoming part of the newly formed American Football Conference.
The AFL and the NFL champions faced each other in Super Bowl IV at the end of the season to determine an overall champion.
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In 1971, Morton began the season as the starter, but after a loss to the New Orleans Saints, Staubach assumed the role. However, in a game against the Chicago Bears during the seventh week of that season, coach Tom Landry alternated Staubach and Morton on each play, sending in the quarterbacks with the play call from the sideline. Dallas gained almost 500 yards of offense but committed seven turnovers that resulted in a 23–19 loss to a mediocre Bears squad that dropped the Cowboys to 4–3 for the season, two games behind the Washington Redskins in the NFC East race.
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