Finding the True Border Between Yankee and Red Sox Nation Using Facebook Data

The 'Moneyball' A's Find a New Inefficiency: Other Teams' Players - WSJ

Yankees–Red Sox rivalry - Wikipedia

FOX Soccer, Facebook combine to map out MLS fans in USA and Canada

New York Yankees star finds out he is waived off ESPN before being picked up by new team - Baseball - Sports - Daily Express US

Where Do Rivals Draw the Line? - The New York Times

The border between “New England” and the “New York Tri-State” in Connecticut as plotted by whether someone in a Red Sox or Yankees fan : r/MapPorn

July, 2013

White Sox-Yankees game postponed because of smoke from wildfires - Chicago Sun-Times

Map Shows Red Sox, Yankees Border in Connecticut

Saluting Kenley Jansen, who's been one of Red Sox' best signings – NBC Sports Boston