[ANALYSIS] With the closing of the summer transfer window in the United States and Canada, a new wave of foreigners has entered Major League Soccer. In their most recent games, only eight of the 16 teams fielded lineups with a majority of players eligible for the U.S. national team. And only 19 of these Americans -- a majority of them defensive players -- were under-23 at the beginning of the year, meaning just a small pool of young talent is available for the next national team coach to build upon. How different is the face of MLS from eight years and what does it mean?

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