I have seen a similar situation. While I'm not a Dallas Cowboy fan at all, I'd be willing to bet that El Paso has/had a higher percentage of citizens that were Cowboy fans than Dallas does. A local talked Jerry into having a controlled intersquad scimmage in the Sun Bowl one year. It sold out in 1/2 day...for a frickin' controlled intersquad scrimmage. Not a pre season game or a scrimmage with another team.
I say all that as a set up to this. El Paso is 200 miles closer to Phoenix than Dallas. Soooooooooo, when the Cowboys play the Cardinals in Zona, the stadium is usually 60-70% Cowboy fans... most of which are from El Paso. It never fails.