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Earned Run Average (ERA) Calculator

Definition of Earned Run Average (ERA):

Earned Run Average (ERA) is a statistical measure used in baseball to evaluate a pitcher's performance. It is calculated by dividing the number of earned runs allowed by the number of innings pitched, and then multiplying by the number of innings in a game.

The result is:
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What is the earned run average of a pitcher with 3 earned runs in 6 innings pitched in a game with 9 innings?

Formula Explanation:

The formula for calculating ERA is: (Earned Runs / Innings Pitched) * Innings in a Game. This formula essentially measures the average number of earned runs a pitcher allows per game.

Detailed Explanation:

ERA is a measure of the average number of earned runs a pitcher allows per game, calculated as (Earned Runs / Innings Pitched) * Innings in a Game. This means that ERA rewards pitchers for allowing fewer runs and for pitching more innings.

Importance:

ERA is one of the most important statistics in baseball as it is a key component of many other statistics and is a primary measure of a pitcher's effectiveness. A low ERA means a pitcher is allowing fewer runs, which gives their team a better chance to win.

Historical Use:

Earned Run Average (ERA) has been used as an official MLB statistic since the early days of professional baseball. It is a fundamental measure of a pitcher's effectiveness.

Historical Context:

ERA has been used in baseball since the 19th century and is one of the oldest baseball statistics. It is a fundamental measure of a pitcher's effectiveness.

Limitations:

While ERA is a useful statistic, it does not take into account the quality of the defensive players behind the pitcher, which can significantly affect the number of runs allowed.

Example:

If a pitcher allows 3 earned runs in 6 innings pitched in a 9-inning game, their ERA would be calculated as follows: (3 (earned runs) / 6 (innings pitched)) * 9 (innings in a game).

Famous Examples:

Dutch Leonard holds the record for the lowest single-season ERA at 0.96 in 1914. Ed Walsh holds the record for the lowest career ERA at 1.82.

Frequently Asked Questions:

What is a good ERA?

In professional baseball, an ERA under 4.00 is generally considered good, and an ERA under 3.00 is considered excellent.

Why is ERA important?

ERA is important because it measures a pitcher's effectiveness at preventing runs, which is the primary goal of a pitcher.

Who has the lowest career ERA?

Ed Walsh holds the record for the lowest career ERA at 1.82.

Sources:

MLB

Major League Baseball explanation of Earned Run Average (ERA)

Read more →

Fangraphs

The Importance of ERA

Read more →

Earned Run Average (ERA)

SportCalcs
Result
0
Earned Runs
3
Innings Pitched
6
Innings in a Game
9
What is the earned run average of a pitcher with 3 earned runs in 6 innings pitched in a game with 9 innings?
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