Noun
(baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched
Source: WordNetAfter Bryant’s opening-day debacle — the 10-1 loss to Fort Smith Sportsman — the team earned run average was 1.67. Source: Internet
Chadwick is credited with devising statistical measures such as batting average and earned run average (ERA). Source: Internet
He is said to have created the statistics of batting average and earned run average (ERA). Source: Internet
After being drafted by the Yankees in the third round, he pitched 14 seasons for the New York, finishing with a career record of 170-91 and a 3.29 earned run average. Source: Internet
After starting the year 0-3, the pitcher finished 7-3 overall with a 3.43 earned run average. Source: Internet
Berry finished 3-0 on the mound for the Green Wave, striking out 33 and finishing with an earned run average of 2.22. Source: Internet