The unwritten rules of baseball are an easily mockable codicil of the game's goofier aspects—a list of grievances so small, petty and strange that it's hard to imagine anyone involved can keep a straight face when getting mad about a breach of them. Don't flip your bat too exuberantly; don't steal bases in blowouts; don't bunt for hits when a pitcher has a perfect game or no-hitter going. Such tenets are enforced through gruff chats and, inevitably, fastballs to the back, as the players police themselves for the kind of minor violations that add up to nothing over the course of a season.
Twins Mad at Orioles' Chance Sisco Over Ninth-Inning Bunt in Dumb Unwritten Rules Flap
