Fans of the Green Bay Packers and Pittsburgh Steelers tend to carry their passions for life. Babies in Terrible Towels, pilgrimages to the graves of Lombardi or Lambeau.

On Sunday, two of the most rabid, far-reaching fan bases in pro sports will follow the venerable franchises in the Super Bowl in Dallas.

The support spans all ages and classes in the two blue-collar cities.

Parents name their children after their favorite players, others pass family season tickets down while thousands more wait for a chance to buy them. Each team has sellout streaks that date back generations.