Editing Plate appearance (section)

==In on-base percentage==
Plate appearances are a primary component in calculating [[on-base percentage]] (OBP), an alternative measurement of a player's offensive performance, but are not the only one in determining its denominator.

By rule, certain plate appearances, such as times reached base via either catcher's interference or fielder's obstruction or sacrifice bunts, are excluded from it, leaving the denominator determined instead as the sum of at-bats, walks, hit-by-pitches, and sacrifice flies.  And the numerator represented by a batter's [[times on base]] (composed of the sum of hits, base on balls, and times hit by pitch).