The New York Yankees and Boston Red Sox are going in opposite directions - ESPN
Jeff Jacobs: Rivalry boiling, Yankees and Rays need to end dangerous game of old school justice
Tony La Russa unwritten rules: Why MLB should let teams give up - Sports Illustrated
The unwritten rules of baseball
New York Yankees vs. Boston Red Sox (7/15/2021): Series schedule, time, TV channel, live stream
Evolution of the Unwritten Rules
Xander Bogaerts' baserunning error proves costly as Red Sox fade late in loss to Yankees
White Sox' Tim Anderson takes on unwritten rules — with MLB's approval - The Boston Globe
Red Sox lose rain-shortened game, Yankees complete 4-game sweep
Can either of these teams win the AL East? How Red Sox, Yankees are overachieving -- and underachieving - ESPN
Who cursed the Yankees? AL Wild Card loss raises spectral question
The Unwritten Rule About Baseball's Unwritten Rules
Unwritten Rule Gets Max Kepler Hit By A Pitch - Twins - Twins Daily
Should Red Sox Expect Retribution From Yankees Over Unwritten Rules?