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Lowest earned run average in a baseball season

Lowest earned run average in a baseball season
Who
Zach Britton
What
0.54 total number
Where
Not Applicable
When
2016

The lowest earned run average (ERA) in a season with at least 50 innings pitched is 0.54 by Zach Britton (USA) while pitching for the Baltimore Orioles (USA) in 2016. Britton pitched 67 innings while allowing only four earned runs.

n/a