Note to Yankees, Mets fans: There wasn't always a postseason
A Map of Baseball Nation - The New York Times
Yanks win as Castillo drops popup
Map Breaks Down Boundaries of Yankees and Red Sox Nations
Yankees, Mets fans should brace for big changes to watching MLB on
Up Close on Baseball's Borders - The New York Times
Map of MLB Fandom Across the U.S. [OC] : r/baseball
Pro Baseball Stadium Scratch Off Map; Ballpark Stadium
Yankees Sweep Mets in Possible World Series Preview - The New York