Diehard supporters of Yankees, Red Sox are the most passionate in

16 Facts About New York Yankees

Yankees fans throw trash at Guardians players in chaotic finish

I Love the Red Sox/I Hate the Yankees by Jon Chattman, Allie Tarantino, Rich Tarantino - Ebook

Is Don Mattingly the only New York Yankees player to not be booed by New York Yankee fans at Yankee Stadium? If so, why? - Quora

As a lifelong and diehard Yankees fan, I offer my condolences and I can only hope that baseball helps you and your city heal as it did for us 12 years ago.

17 Facts About Boston Red Sox

Yankees get inspiration from 2004 Red Sox's ALCS victory

Kevin Millar says Red Sox fans singing 'Sweet Caroline' one of best traditions in sports: 'Nothing better

You Gotta Step It Up Now, Kid … This Is New York