Earned Run Average

In baseball statistics, earned run average (ERA) is the mean of earned runs given up by a pitcher per nine innings pitched. It is determined by dividing the number of earned runs allowed by the number of innings pitched and multiplying by nine. Runs resulting from defensive errors (including pitchers' defensive errors) are recorded as unearned runs and are not used to determine ERA.

Read more about Earned Run Average:  Origins, ERA in Different Decades and Baseball Eras, Sabermetric Treatment of ERA, All-time Career Leaders

Famous quotes containing the words earned, run and/or average:

    The theory [before the twentieth century] ... was that all the jobs in the world belonged by right to men, and that only men were by nature entitled to wages. If a woman earned money, outside domestic service, it was because some misfortune had deprived her of masculine protection.
    Rheta Childe Dorr (1866–1948)

    Man, in the ideal, is so noble and so sparkling, such a grand and glowing creature, that over any ignominious blemish in him all his fellows should run to throw their costliest robes.
    Herman Melville (1819–1891)

    Public opinion, a vulgar, impertinent, anonymous tyrant who deliberately makes life unpleasant for anyone who is not content to be the average man.
    —W.R. (William Ralph)