on-base percentage

noun

Definition of on-base percentage

baseball
: a statistic that is expressed as a 3-digit decimal and that indicates the frequency with which a batter reaches base by a hit, a walk, or being hit by a pitch

Note: A batter with an on-base percentage of .350 has reached base 3.5 times for every 10 at bats.

Through Sunday he led the league in on-base percentage (.479) and hits (40) and was second in runs scored (21) and ninth in slugging percentage (.515).— Ivan Maisel … he understood that on-base percentage was a far better tool to evaluate a hitter than batting average …— Tom Verducci

First Known Use of on-base percentage

1949, in the meaning defined above

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The first known use of on-base percentage was in 1949

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not constant or steady

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