List of Major League Baseball career ERA leaders

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.

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.