What does it mean to post a k in a baseball stadium?

Answer 1

A "k" is a strikeout, from the abbreviation used to denote a strikeout when scoring Baseball on a scorecard. In some stadiums, simply "k" is the denotation; in others, there is a distinction made between a "k" and one which is written backwards. A "k" written forwards means that the battter struck out swinging (he swung at the last pitch, producing the final strike). A "k" written backwards means that the batter struck out looking (he did not swing at the pitch that produced the final strike). In broadcasting, "posting a k" simply means that the batter struck out and does not distinguish between a batter who struck out swinging and one who struck out looking.