Rare card
List of Major League Baseball career ERA leaders
- Value
- 50 W
- Attack
- 743
- Defence
- 594
- Players
- 0
In baseball statistics, earned run average (ERA) is the mean of earned runs given up by a pitcher per nine innings pitched (i.e., the traditional length of a game). It is calculated by dividing the number of earned runs allowed by the number of innings pitched and multiplying by nine.
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