Writing the Unwritten Rules
Tim Anderson, bat flips and ignoring baseball's 'unwritten rules' - The Washington Post
Yasiel Puig, Reds show MLB's unwritten rules still exist - Sports Illustrated
The unwritten rules of baseball
From bat flips to bunts, baseball's 'unwritten rules' can be a challenge to navigate
The Unwritten Rules of Baseball by Paul Dickson - Ebook
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
The 'Code': Ten unwritten baseball rules you might not know
This is why baseball is so white - Vox
The unwritten rules of baseball