Oakland Athletics
Season Records 1901-2021 (121 seasons)

Teams San Francisco-Oakland Oakland Athletics History Season Records

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Athletics Season Records
ERA

1

33.60

2

33.12

3

31.54

4

28.16

5

27.10

6

26.48

7

25.96

8

22.20

9

21.71

10

21.63

11

21.54

12

20.84

13

20.33

14

George Earnshaw

19.98

15

19.45

16

19.12

17

Phil Marchildon

19.02

18

18.10

19

17.54

20

16.72

21

16.40

22

15.53

23

15.35

24

Roy 'Slug' Mahaffey

14.49

25

14.49

26

14.34

27

14.08

28

13.61

29

13.59

30

13.54

31

13.44

32

13.33

33

12.94

34

12.44

35

12.31

36

12.28

37

12.27

38

11.95

39

Bullet Joe Bush

11.93

40

11.75

41

11.70

42

11.61

43

11.26

44

11.05

45

11.05

46

11.03

47

10.92

48

10.43

49

10.07

50

Russ Christopher

9.96

51

9.90

52

9.47

53

9.41

54

9.24

55

9.22

56

9.16

57

9.04

58

8.93

59

8.92

60

John O'Donoghue

8.86

61

8.82

62

8.73

63

8.65

64

8.57

65

8.36

66

8.26

67

8.18

68

8.13

69

8.07

70

8.06

71

7.95

72

7.89

73

7.88

74

7.75

75

7.73

76

7.53

77

7.48

78

7.46

79

7.08

80

6.87

81

6.62

82

Boardwalk Brown

6.61

83

6.54

84

6.39

85

6.34

86

6.22

87

6.11

88

6.10

89

Todd Van Poppel

6.08

90

6.05

91

5.90

92

5.84

93

5.81

94

5.75

95

5.65

96

5.50

97

5.40

98

5.38

99

5.21

100

5.10

List only includes players that met minimum statistical requirements