Baseball is nicknamed "America's favorite past-time" where as soccer or "football" is easily "The World's favourite past time" except in America. However the 2010 World Cup this past summer is proving to the world that the US is interested in joining the international community.

No American has caught the eyes of the world like US Soccer Star Landon Donovan has this past summer. He has shown that America is no longer seen as a self centered, self contained culture with it's own interests independent of the rest of the world. We can see what the international community is interested in, we can participate and we will dominate! (one day)
In my travels, I find it rare that I meet people who know about basketball, baseball or NFL football. And when I do, it's very much the same "I LOVE THE YANKEES!" or "I love the NBA"
-well do you know who Derek Jeter is? and you know not to wear your Yankee cap if you go to Boston, right?
-you know Kobe Bryant plays for the Lakers and you know of Lebron James but do you know who Lebron plays for? uhh.... Chicago? What's Cleveland?
Soccer or Football is different. I can meet a person from England and say, "You hear Thierry Henry plays for New York now?" and have an engaging conversation like, "Yeah he totally scored on Tottenham during his first game with New York." or I'd get an America-oriented topic like "That Landon Donovan has really impressed a few people here in the UK. I hear Manchester City is interested in him."
You build friendships with common interests and the international common interest is Soccer or "Football" as the rest of the world calls it. You cannot be a cosmopolitan, travel junkie or open minded traveler and think "Soccer is stupid." or else you'd just be another "Stupid American."