*earned run av*er*age*

**What Is The Definition Of Earned Run Average (ERA) In Baseball?**

1. Earned run average, or ERA, is a baseball statistic that represents the average number of earned runs given up by a pitcher per nine innings pitched.

**How Do You Calculate ERA?**

An ERA is calculated by dividing the total number of earned runs by the total number of innings pitched, then multiplying by nine and rounding to two decimal places. For professional baseball pitchers, an ERA of 2.00 or less is highly desirable.

For example, a pitcher who has allowed 20 earned runs in 200 innings pitched is as follows:

- 20/200 x 9 = .90 ERA

**What Is Considered A Good ERA In Baseball?**

A good earned run average varied from generation-to-generation. For example, in the early eras of the game such as the early 1900s, a good ERA was considered to be in the low 2.00 area. With all the rule changes that have evolved over the years to help favor batters, the number for a good ERA has grown higher. In today’s game, a good ERA is considered to be 4.00 or lower. This is due to the talent of hitters and the greater emphasis and new technology to help hitters in their conditioning and training.

**Examples Of How Earned Run Average (ERA) Is Used In Commentary**

1. **Maddux** is perfect yet again tonight, pitching another shutout to lower his ERA to a league-leading 1.98.

**Sports The Term Is Used**

1. **Baseball**

2. Softball

**Abbreviated As:**

1. ERA