In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the number of innings pitched and multiplying by nine.

Earned run average represents the number of earned runs a pitcher allows per nine innings -- with earned runs being any runs that scored without the aid of an error or a passed ball. ERA is the most commonly accepted statistical tool for evaluating pitchers.

The ERA Calculator is used to calculate the ERA (earned run average) used in baseball statistics. What is ERA? In baseball statistics, Earned Run Average, or ERA, is one of the most well-known pitching statistics and represents the average number of earned runs a pitcher will give up per nine-inning game.

Career ERA Leaders:1.Ed Walsh+/1.816/1173, 2.Addie Joss+/1.887/919, 3.Jim Devlin/1.896/1202, 4.Jack Pfiester/2.024/394, 5.Smoky Joe Wood/2.033/2282, 6.Mordecai Brown+ ...

Feb 16, 2010 · Earned Run Average (ERA) is a rudimentary metric designed to assess how well a pitcher has prevented runs in the past. Given that a pitcher’s job is to aid in the prevention of run scoring, ERA...

Earned runs is the key counting statistic used in ERA, the most widely accepted barometer of a pitcher's success. If there are no errors or passed balls in a given inning or game, all the runs in that inning or game are earned runs.

Feb 21, 2024 · Earned run average, abbreviated ERA, has long been one of baseball's most recognizable statistics, signifying the number of earned runs that a pitcher surrenders per nine innings.

May 15, 2022 · A pitcher's Earned Run Average (aka ERA) is a primary measure of his success. It is similar, but not identical to, run average. It is expressed as an average number of opponents' earned runs scored per notional nine inning game: ERA = (Earned Runs Allowed * 9) / …

Aug 26, 2023 · Instead of presenting runs per inning, earned run average presents “runs per 9 innings” which is easily interpretable as “runs per game”. This can be done by first figuring out the number of games a pitcher has pitched for. If they have thrown for 45 innings, they’ve pitched 5 games (equivalently).