This is an alphabetical list of selected unofficial and specialized terms, phrases, and other jargon used in baseball, along with their definitions, including illustrative examples for many entries. 展开

"Oh and ..." See count.
The number 1 in baseball refers to the pitcher's position, a shorthand call for throwing to first, a single hit, and a fastball sign.
An inning in whic… 展开

As of the 2022 season, "Class A" is the lowest grouping of modern affiliated minor league baseball, with sub-categories of "High-A" and "Single-A". "Short-Season A" leagues also existed before 2021. High-A is divided into thre… 展开

A breaking pitch, usually a slider, curveball, or cut fastball that, due to its lateral motion, passes through a small part of the strike zone on the outside edge of the plate after seeming as if it would miss the plate entirely. It may n… 展开