2019 MLB London Series - Wikipedia
Blue Jays let one slip away against the Yankees
Jays go extra mile to beat Red Sox in longest game of season
Yankees Leave London With 'Eye-Opening' Wins Over Red Sox - The New York Times
Boston Red Sox
Kenley Jensen shares true feeling in Red Sox clubhouse after sweeping Yankees
New York Yankees - Wikipedia
The Antiseptic Truth About the Yankees-Red Sox Rivalry - The New York Times
There are a lot of underachieving major league teams, but the Mets have taken it to a new level - The Boston Globe
Finding the True Border Between Yankee and Red Sox Nation Using Facebook Data