What is a po in baseball urban dictionary?

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In baseball slang, "PO" is an abbreviation for "putout," the act of recording an out on a play that a fielder handles successfully, such as catching a fly ball, tagging a runner, or throwing out a batter at first base. In general, a PO is any defensive play that ends with an out recorded on a defensive player's statistics.

Additionally, PO can sometimes be used as slang for "pitcher's out," describing a situation where a pitcher induces an out without any help from their fielders (e.g., a strikeout or popup). It can also refer to a pitcher who is excellent at getting putouts, especially through strikeouts.