definitions

earned run average

noun Baseball.

a measure of the effectiveness of a pitcher, obtained by dividing the number of earned runs scored against the pitcher by the number of innings pitched and multiplying the result by nine. A pitcher yielding three earned runs in nine innings has an earned run average of 3.00. Abbreviation: ERA, era

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Nearby words

earn, earn one's keep, earn one's stripes, earned income, earned run, earned run average, earned surplus, earner, earnest, earnest money, earnings

Origin of earned run average

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019