Red Sox Fans, With a Title to Cheer, Choose the Yankees to Jeer - The New York Times
Mets–Yankees rivalry - Wikipedia
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Yankees fans' ALCS behavior could drive Aaron Judge into Red Sox' arms
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Where Do Rivals Draw the Line? - The New York Times
What do Yankees fans do when their team stinks and the Red Sox come to town? They boo both
Red Sox hand Yankees a gift on misplayed popup by Franchy Cordero in series opener - The Boston Globe
Jimmy Kimmel Convinces Red Sox Fans To Cheer For The Yankees