AO

What does AO stand for in baseball?

Fly outs

AO is a baseball statistic that tracks every time an opposing batter's fly ball results in an out. If you are crunching numbers to see how pitchers perform against hitters, AOs are essential for understanding their effectiveness at keeping the ball in play.

Unlike the "SF" stat, AOs are more straightforward, purely about recording outs from fly balls, whether they're caught in the infield or deep in the outfield. A pitcher with a high AO count utilizes their defense, particularly their outfielders, to record outs and progress through the game.

Example

hey, did you catch the game last night?
yeah! there were so many AOs, it was crazy.
totally, williams relies heavily on those fly ball outs
Minor league pitcher stats including AO on Reddit
Minor league pitcher stats including AO on Reddit

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Updated April 30, 2026

AO definition by Slang.net - The Slang Dictionary

This page explains what the acronym "AO" means. The definition, example, and related terms listed above have been manually compiled and written by the Slang.net team.

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