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
Origin of earned run average
First recorded in 1945–50
Words nearby earned run average
earn,
earn one's keep,
earn one's stripes,
earned income,
earned run,
earned run average,
earned surplus,
earner,
earnest,
earnest money,
earnings