Baseball Instruction/ERA

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Expert: - 4/20/2009


Question
Really dumb question I'm embarrassed to ask:  how is earned run average
calculated?

Thanks.

Ken

Answer
Ken,

Here it is:

ERA = (9 x Earned Runs Allowed)/Innings Pitched

So, a pitcher who gives up 4 earned runs when pitching 8 innings:

9 x 4 / 8 = 4.50 ERA

If they give up 50 runs in 100 innings pitched:

9 x 50 / 100 = 4.50 ERA

Hope this helps!

Brian

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Brian Flaspohler

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Questions about baseball rules, general information about the game, statistical analysis, questions about players, questions about Baseball records. I am a member of the Society for American Baseball Research (SABR) and a lifelong baseball fanatic. Don't ask me questions about training - this is not my area of expertise.

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