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earned run average

American  
[urnd ruhn av-er-ij, av-rij] / ˈɜrnd ˈrʌn ˌæv ər ɪdʒ, ˌæv rɪdʒ /

noun

Baseball.

  1. a measure of the effectiveness of a pitcher, calculated by dividing the number of earned runs scored against the pitcher by the number of innings pitched and multiplying the result by nine: ERA

    His earned run average is currently a worrisome 6.21, as he has pitched 42 innings and given up 29 earned runs.

Etymology

Origin of earned run average

First recorded in 1945–50

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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