because no other country can be bothered to play American football
Because no other country can compete with NFL teams in American Football. The same reason the World Series champion is called the "World Champion" (though, in the case of MLB, there is one team, the Toronto Blue Jays, outside of the US).
Moreover, the title "National Champion" is used by the champion of College Football, and is thus unavailable for the champion of professional football.
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Spain.
World Cup you mean? Italy.
Spain
six
Spain points=1456
Spain National Football Team.
it's all about sports and handballing and kicking and get a goal and be the world's best football champion
Pittsburgh Steelers, with their amazing 6 Superbowl wins!
Most likely razil or Spain.
There is no American Football around the world because it is not popular outside the US
Barcelona are the best football team in the world because they have won 4 or 3 champion leagues and they have all the best players
The goalkeeper Iker casillas is the captain of Spain the world champions.