English Dictionary

inside baseball

noun

(US, idiomatic, baseball) Technical matters concerning baseball generally not apparent or of interest to spectators. / (US, idiomatic, by extension) Matters of interest only to insiders.

Inside baseball is a term used to describe detailed knowledge or information about a particular subject, especially when it is not widely known or understood by the general public.

意味（1）

(US, idiomatic, baseball) Technical matters concerning baseball generally not apparent or of interest to spectators.

There always has been a tendency to overlook the catcher, possibly because so much of him is covered up during the game, but more because the greatest part of his work is inside baseball and of the kind which the general public can neither see nor appreciate.

意味（2）

(US, idiomatic, by extension) Matters of interest only to insiders.

But in fact, redistricting remained very much a game of inside baseball.