MLB - The Boston Red Sox own #TheRivalry. After another
Yankees vs. Red Sox: A complete history of MLB's biggest rivalry in winner-take-all playoff games
Finding the True Border Between Yankee and Red Sox Nation Using Facebook Data
15 biggest MLB rivalries of all time
The Good, the Bad, and the Ugly: 50 Greatest Yankees-Red Sox Rivalry Moments (#BBFacts Ep. 11)
The 5 Biggest Rivalries in MLB History — Hive
Dodgers-Padres Is Poised to Become MLB's Next Yankees–Red Sox Rivalry - The Ringer
B/R MLB Rivalry Series: New York Yankees vs. Boston Red Sox, News, Scores, Highlights, Stats, and Rumors
For MLB's Debut in Europe, an Unusual Yankees-Red Sox Series - WSJ
M.L.B. Postseason: How the Red Sox Beat the Yankees in the A.L. Wild-Card Game - The New York Times
The Red Sox are officially the Yankees' daddy