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. Runs resulting from defensive errors (including pitchers' defensive errors) are recorded as unearned runs and are not used to determine earned run average.
This is a list of the top 100 players in career earned run average, who have thrown at least 1,000 innings.
Ed Walsh[1][2] holds the major league earned run average record at 1.816. Addie Joss[3] (1.887) and Jim Devlin[4] (1.896) are the only other pitchers with a career earned run average under 2.000.
- ^ "Ed Walsh Career Stats". Baseball Reference. Retrieved July 28, 2021.
- ^ Dziurgot, Stanley. "Ed Walsh Bio". Society For American Baseball Research. Retrieved July 28, 2021.
- ^ "Addie Joss Career Stats". Baseball Reference. Retrieved July 28, 2021.
- ^ "Jim Devlin Career Stats". Baseball Reference. Retrieved July 28, 2021.