My wife is American but if I was young in today's culture I'd go outside the US if I was looking for a long term relationship. Foreign chicks are so well grounded. There are spoiled ones among them of course but the fishing is far more productive in those pools.
Also Americans do very well overseas in that regard. European countries like England and Ireland take a bit too much after the US in their culture, but Spain and Italy are outstanding.
When I lived in Italy it was funny watching young US service members getting serious with Italian girlfriends. I would tell them "remember if you marry an Italian woman you marry the entire family" and some did not believe me until it was too late. Couple really good friends of mine never left Italy for that reason.
These US football players should really spend a month travelling in South America or Asia or parts of Northern Africa, depending on what flavor they prefer. Northern Africa is pretty incredible too, people don't list it a lot but their women are a smoky mix of middle east, black, and european genes. Absolutely fantastic.
Ok sorry for letting my inner sailor out there. Happens time to time. I'm a big fan of beauty and there is a great deal of it out there in the world.