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Athletics All-Time Leaders
ERA

1
Profile photo of Al Atkinson

Al Atkinson

1884-1887

4.36

2
Profile photo of Sadie McMahon

Sadie McMahon

1889-1890

3.41

3
Profile photo of Ed Seward

Ed Seward

1887-1890

3.41

4
Profile photo of Gus Weyhing

Gus Weyhing

1887-1889

3.20

5
Profile photo of Bobby Mathews

Bobby Mathews

1883-1887

3.06