Baseball's oldest rivalry.

The Biggest MLB Rivalries of All-Time - Ticketmaster Blog

London calling for devout MLB fans as historic rivalry goes international, MLB

What Are the Biggest Rivalries in Baseball?

Everything to Know About the Historic Rivalry Between the New York Yankees and Boston Red Sox - EssentiallySports

No. 19 Virginia baseball sweeps on opening weekend - The Cavalier Daily - University of Virginia's Student Newspaper

The 5 Biggest Rivalries in MLB History — Hive

A baseball Fan in Notts: MLB Arrives in Blighty - Leftlion - Nottingham Culture

Major League Baseball rivalries - Wikipedia

The 4 Great rivalries in the History of MLB

Mets-Nationals Poised to Become at Least a Passing Rivalry - The New York Times