lowest era a season since 1900

Since 1900, Dutch Leonard has the best ERA in a season, with an ERA of 0.96 in 1914.

Interpreted as:
lowest era with a minimum of 1 IP per team game by a player a season since 1900
NAMEERASEASONTMGWLW%GSSOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPK/9BB/9K/BBHR/9K%BB%WHIPBABIPRAERA-FIPFIP-H/9PRAA
1Dutch Leonard
D. Leonard
0.96
1914
BSA BSA
36
19
5
.792
25
176
17
7
3
224.2
139
24
34
3
60
8
8
842
2
7.05
2.40
2.93
0.12
20.9
7.1
0.89
.229
1.36
36
1.95
70
5.57
20.4
2Mordecai Brown
M. Brown
1.04
1906
CHC CHC
36
26
6
.813
32
144
27
9
3
277.1
198
32
56
1
61
4
4
1,044
2
4.67
1.98
2.36
0.03
13.8
5.8
0.93
.236
1.82
39
2.08
75
6.43
21.1
3Bob Gibson
B. Gibson
1.12
1968
STL STL
34
22
9
.710
34
268
28
13
0
304.2
198
38
49
11
62
7
0
6
1,161
4
7.92
1.83
4.32
0.32
23.1
5.3
0.85
.230
1.45
38
1.77
63
5.85
34.8
4Christy Mathewson
C. Mathewson
1.14
1909
NYG NYG
37
25
6
.806
33
149
26
8
2
275.1
192
35
57
2
36
0
4
998
4
4.87
1.18
4.14
0.07
14.9
3.6
0.83
.234
1.86
44
1.62
61
6.28
31.7
5Walter Johnson
W. Johnson
1.14
1913
WSH WSH
48
36
7
.837
36
243
29
11
2
346.0
232
44
56
9
38
9
10
1,271
2
6.32
0.99
6.39
0.23
19.1
3.0
0.78
.229
1.46
39
1.90
63
6.03
42.3
6Jack Pfiester
J. Pfiester
1.15
1907
CHC CHC
30
14
9
.609
22
90
13
3
0
195.0
143
25
61
1
48
5
5
745
2
4.15
2.22
1.88
0.05
12.1
6.4
0.98
.236
2.82
47
2.14
81
6.60
10.6
7Addie Joss
A. Joss
1.16
1908
CLE CLE
42
24
11
.686
35
130
29
9
2
325.0
232
42
77
2
30
2
6
1,209
6
3.60
0.83
4.33
0.06
10.8
2.5
0.81
.220
2.13
49
1.68
76
6.42
19.3
8Carl Lundgren
C. Lundgren
1.17
1907
CHC CHC
28
18
7
.720
25
84
21
7
0
207.0
130
27
42
0
92
2
3
795
2
3.65
4.00
0.91
0.00
10.6
11.6
1.07
.211
1.83
48
2.73
104
5.65
-2.3
9Grover Alexander
G. Alexander
1.22
1915
PHN PHN
49
31
10
.756
42
241
36
12
3
376.1
253
51
86
3
64
10
7
1,435
2
5.76
1.53
3.77
0.07
16.8
4.5
0.84
.224
2.06
43
1.82
63
6.05
44.1
10Cy Young
C. Young
1.26
1908
BOS BOS
36
21
11
.656
33
150
30
3
2
299.0
230
42
68
1
37
1
3
1,116
4
4.52
1.11
4.05
0.03
13.4
3.3
0.89
.247
2.05
52
1.52
67
6.92
25.4
11Ed Walsh
E. Walsh
1.27
1910
CWS CWS
45
18
20
.474
36
258
33
7
5
369.2
242
52
87
5
61
4
7
1,359
6
6.28
1.49
4.23
0.12
19.0
4.5
0.82
.230
2.12
52
1.63
66
5.89
34.8
12Walter Johnson
W. Johnson
1.27
1918
WSH WSH
39
23
13
.639
29
162
29
8
3
326.0
241
46
71
2
70
8
10
1,261
8
4.47
1.93
2.31
0.06
12.8
5.6
0.95
.235
1.96
47
2.04
74
6.65
25.9
13Christy Mathewson
C. Mathewson
1.28
1905
NYG NYG
43
31
9
.775
37
206
32
8
3
338.2
252
48
85
4
64
1
6
1,294
6
5.47
1.70
3.22
0.11
15.9
4.9
0.93
.243
2.26
42
2.03
69
6.70
34.9
14Jack Taylor
J. Taylor
1.29
1902
CHO CHO
37
23
11
.676
34
88
34
8
1
333.2
273
48
86
2
45
12
3
1,278
10
2.37
1.21
1.96
0.05
6.9
3.5
0.95
.240
2.32
49
2.73
98
7.36
0.6
15Jack Coombs
J. Coombs
1.30
1910
PHA PHA
45
31
9
.775
38
224
35
13
1
353.0
248
51
74
0
115
7
6
1,353
10
5.71
2.93
1.95
0.00
16.6
8.5
1.03
.246
1.89
53
2.09
83
6.32
15.8
16Mordecai Brown
M. Brown
1.31
1909
CHC CHC
50
27
9
.750
34
172
32
8
7
342.2
246
50
78
1
53
7
15
1,280
9
4.52
1.39
3.25
0.03
13.4
4.1
0.87
.234
2.05
51
1.78
68
6.46
32.4
17Walter Johnson
W. Johnson
1.36
1910
WSH WSH
45
25
17
.595
42
313
38
8
1
370.0
262
56
92
1
76
13
3
1,367
21
7.61
1.85
4.12
0.02
22.9
5.6
0.91
.271
2.24
56
1.39
56
6.37
45.2
18Walter Johnson
W. Johnson
1.39
1912
WSH WSH
50
33
12
.733
37
303
34
7
2
369.0
259
57
89
2
76
16
13
1,413
11
7.39
1.85
3.99
0.05
21.4
5.4
0.91
.253
2.17
42
2.03
63
6.32
49.6
19Mordecai Brown
M. Brown
1.39
1907
CHC CHC
34
20
6
.769
27
107
20
6
3
233.0
180
36
51
2
40
6
7
861
4
4.13
1.55
2.68
0.08
12.4
4.6
0.94
.252
1.97
56
1.97
75
6.95
17.2
20Harry Krause
H. Krause
1.39
1909
PHA PHA
32
18
8
.692
21
139
16
7
0
213.0
151
33
49
2
49
13
8
801
2
5.87
2.07
2.84
0.08
17.4
6.1
0.94
.249
2.07
58
1.91
82
6.38
9.5
21Ed Walsh
E. Walsh
1.41
1909
CWS CWS
31
15
11
.577
28
127
20
8
2
230.1
166
36
52
0
50
4
3
871
4
4.96
1.95
2.54
0.00
14.6
5.7
0.94
.241
2.03
61
1.82
81
6.49
10.3
22Ed Walsh
E. Walsh
1.42
1908
CWS CWS
66
40
15
.727
49
269
42
11
6
464.0
343
73
111
2
56
9
16
1,755
10
5.22
1.09
4.80
0.04
15.3
3.2
0.86
.240
2.15
63
1.42
67
6.65
34.2
23Ed Reulbach
E. Reulbach
1.42
1905
CHC CHC
34
18
14
.563
29
152
28
5
1
291.2
208
46
71
1
73
18
5
1,124
5
4.69
2.25
2.08
0.03
13.5
6.5
0.96
.235
2.19
48
2.46
85
6.42
14
24Orval Overall
O. Overall
1.42
1909
CHC CHC
38
20
11
.645
32
205
23
9
3
285.0
204
45
66
1
80
8
6
1,116
11
6.47
2.53
2.56
0.03
18.4
7.2
1.00
.247
2.08
55
1.75
67
6.44
27.8
25Christy Mathewson
C. Mathewson
1.43
1908
NYG NYG
56
37
11
.771
44
259
34
11
5
390.2
281
62
85
5
42
3
9
1,469
2
5.97
0.97
6.17
0.12
17.6
2.9
0.83
.238
1.96
61
1.29
52
6.47
52.4
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