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.
How is earned run average calculated?
ERA is the most commonly accepted statistical tool for evaluating pitchers. The formula for finding ERA is: 9 x earned runs / innings pitched. If a pitcher exits a game with runners on base, any earned runs scored by those runners will count against him.
How do you determine if a run is earned or unearned?
In baseball, an earned run is any run that was fully enabled by the offensive team’s production in the face of competent play from the defensive team. Conversely, an unearned run is a run that would not have been scored without the aid of an error or a passed ball committed by the defense.
Is a homerun an earned run?
Earned and Unearned Examples
The leadoff batter comes up and hits a home run, that run is earned. That one is easy, so are the simple unearned runs. There are two outs when a batter hits a ground ball to short. The shortstop boots it and the runner reaches first base.
What counts unearned run?
Definition. An unearned run is any run that scored because of an error or a passed ball. Oftentimes, it is the judgment of the official scorer as to whether a specific run would’ve scored without the defensive mishap. The purpose of the unearned run is to distinguish which runs a pitcher is at fault for allowing.
How is FIP calculated?
The formula for FIP is simply: (13*HR + 3*BB – 2*K)/IP + C, where C is a constant term that re-centers the league-average FIP to match its average ERA.
What is a good earned run average?
An ERA between 2.00 and 3.00 is also considered excellent and is only achieved by the best pitchers in the league. An ERA between 3.00 and 4.00 is above-average. An ERA between 4.00 and 5.00 is average; the majority of pitchers have an ERA in this range.
Does the runner on second count as an earned run?
The runner placed on second base at the start of each half-inning in extras will be the player in the batting order immediately preceding that half-inning’s leadoff hitter, or a pinch-runner. … If the automatic runner comes around to score, an earned run will not be charged to the pitcher.
Do passed balls count as earned runs?
Passed balls have commonality with wild pitches, as both allow a runner to advance on his own without a stolen base. … A passed ball is not recorded as an error, but when a run scores as the result of a passed ball, it does not count as an earned run against a pitcher.
Does a sacrifice fly count as an earned run?
An earned run shall be charged against a pitcher when a runner scores because of a safe hit, sacrifice hit, sacrifice fly, sto- len base, putout, fielder’s choice, base on balls, hit batter, balk or wild pitch (even when the wild pitch is a third strike), pro- vided that in each case it is before the defensive team has …
Does a walk count as an at bat?
At-bats are used as the denominator when determining batting average and slugging percentage. … Similarly, players who walk infrequently also typically record a higher-than-usual number of at-bats in a season, because walks do not count as at-bats.
Is a wild pitch considered an error?
Because the pitcher and catcher handle the ball much more than other fielders, certain misplays on pitched balls are defined in Rule 10.13 as wild pitches and passed balls. No error shall be charged when a wild pitch or passed ball is scored.
Is an intentional walk charged to the pitcher?
Intentional walks — which count as a walk for the hitter and a walk allowed by the pitcher — are an important strategy in the context of a game. … Beginning in the 2017 season, teams no longer need to throw four balls in order to intentionally walk a batter.
What makes an earned run?
Definition. An earned run is any run that scores against a pitcher without the benefit of an error or a passed ball. Often, it is the judgment of the official scorer as to whether a specific run would’ve scored without the defensive mishap.
What does not count as an earned run?
A batter who reaches base on an error can never score an earned run. A run that scores after there should be three outs is never earned.
Do all runs count on a walk off home run?
As a general rule, all runs count on a walk off home run. The player who hit the walk-off home run is allowed to run around the bases and score, but if that player misses a base or overruns another baserunner, that batter is called out and the home run does not count as a run.