The Dallas Cowboys are one of the NFL’s most iconic franchises with a proud history that includes five Super Bowl titles and countless playoff appearances. However, they have never gone undefeated through both the regular season and playoffs. While they’ve fielded dominant teams in the 1970s and 1990s under coaches like Tom Landry and Jimmy Johnson, the Cowboys have always taken at least one loss during their championship seasons. The team that holds the distinction of a perfect season achieved something truly rare and unmatched in modern football.