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How 'dangerous' is it really for me to wear a Red Sox baseball cap in New York City? - Quora
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Meghan Markle and Prince Harry: Yankees crush Red Sox as league comes out winning in MLB London Series
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In London, Yankees-Red Sox rivalry not quite so heated - The Boston Globe
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Sam Borden - Why the Yankees hat has become a global fashion sensation - ESPN
![Fan wears Yankees and Red Sox hat in London](https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/NewYorkYankees_caplogo.svg/1200px-NewYorkYankees_caplogo.svg.png)
Yankees–Red Sox rivalry - Wikipedia
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Red Sox, Yankees gift jerseys to Prince Harry, Meghan for baby Archie before NY's win in London
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Red Sox OF Alex Verdugo gets into it with fan at Yankee Stadium after ball is thrown at him
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Finding the True Border Between Yankee and Red Sox Nation Using Facebook Data
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How 'dangerous' is it really for me to wear a Red Sox baseball cap in New York City? - Quora