which pitcher has the best era in a calendar month in at least 30 innings

36 pitchers are tied for the best ERA when pitching at least 30 innings in a month, with an ERA of 0.00. The first three are Cristopher Sánchez in May 2026, Orel Hershiser in September 1988 and Dwight Gooden in September 1985.

Showing
  • Assumption:All-time
  • Data note: Earned Run Average, Innings Pitched: player game data complete from 1901
  • Data note: Data: Retrosheet
NAMEERAIPMONTHGWLW%GSSOCGSHOSVHERRHRBBHBPGFIBBTBFWPK/9BB/9K/BBHR/9K%BB%WHIPBABIPRAH/9
1Cristopher Sánchez
C. Sánchez
0.00
39.0
May 2026
5
4
0
1.000
5
45
1
1
0
25
0
0
0
3
1
0
0
143
0
10.38
0.69
15.00
0.00
31.5
2.1
0.72
.266
0.00
5.77
2Orel Hershiser
O. Hershiser
0.00
55.0
September 1988
6
5
0
1.000
6
34
5
5
0
30
0
0
0
9
0
0
3
201
1
5.56
1.47
3.78
0.00
16.9
4.5
0.71
.190
0.00
4.91
3Dwight Gooden
D. Gooden
0.00
44.0
September 1985
5
3
0
1.000
5
39
2
2
0
24
0
1
0
9
0
0
1
164
0
7.98
1.84
4.33
0.00
23.8
5.5
0.75
.207
0.20
4.91
4Mack Allison
M. Allison
0.00
41.0
September 1912
8
1
4
.200
5
10
2
1
1
44
21
1
11
4
3
175
5
2.20
2.41
0.91
0.22
5.7
6.3
1.34
.289
4.61
9.66
5Ray Collins
R. Collins
0.00
45.0
September 1912
5
3
2
.600
5
18
5
1
0
45
13
1
12
0
0
189
0
3.60
2.40
1.50
0.20
9.5
6.3
1.27
.278
2.60
9.00
6Boardwalk Brown
B. Brown
0.00
51.0
September 1912
9
5
1
.833
5
18
5
1
0
50
32
0
22
1
2
218
3
3.18
3.88
0.82
0.00
8.3
10.1
1.41
.282
5.65
8.82
7Willie Mitchell
W. Mitchell
0.00
42.1
September 1912
6
2
2
.500
4
30
2
0
1
37
18
0
12
3
2
177
0
6.38
2.55
2.50
0.00
16.9
6.8
1.16
.280
3.83
7.87
8Eddie Plank
E. Plank
0.00
55.0
September 1912
7
5
1
.833
5
25
4
1
1
33
13
0
21
1
2
218
2
4.09
3.44
1.19
0.00
11.5
9.6
0.98
.193
2.13
5.40
9Carl Weilman
C. Weilman
0.00
41.0
September 1912
6
2
3
.400
5
23
5
2
1
29
12
0
1
0
1
1
5.05
0.22
23.00
0.00
0.6
0.73
.218
2.63
6.37
10Byron Houck
B. Houck
0.00
42.1
August 1912
8
1
1
.500
3
17
1
0
1
37
16
1
18
1
5
173
4
3.61
3.83
0.94
0.21
9.8
10.4
1.30
.265
3.40
7.87
11Ray Collins
R. Collins
0.00
48.0
August 1912
7
4
2
.667
7
21
3
2
0
40
12
0
6
0
0
192
0
3.94
1.13
3.50
0.00
10.9
3.1
0.96
.242
2.25
7.50
12Eddie Plank
E. Plank
0.00
45.0
August 1912
6
4
2
.667
6
27
5
2
0
44
14
0
11
0
0
182
1
5.40
2.20
2.45
0.00
14.8
6.0
1.22
.306
2.80
8.80
13Hugh Bedient
H. Bedient
0.00
56.0
August 1912
8
4
1
.800
7
31
5
0
0
58
23
2
14
0
0
244
2
4.98
2.25
2.21
0.32
12.7
5.7
1.29
.284
3.70
9.32
14Charley Hall
C. Hall
0.00
39.0
August 1912
7
2
1
.667
1
15
0
0
0
39
15
1
10
1
6
159
0
3.46
2.31
1.50
0.23
9.4
6.3
1.26
.288
3.46
9.00
15Ray Caldwell
R. Caldwell
0.00
68.1
August 1912
9
4
3
.571
8
28
7
2
0
71
27
0
14
1
1
2
3.69
1.84
2.00
0.00
4.8
1.24
.285
3.56
9.35
16Earl Hamilton
E. Hamilton
0.00
62.1
August 1912
10
4
3
.571
7
27
6
1
0
39
23
1
22
3
2
248
1
3.90
3.18
1.23
0.14
10.9
8.9
0.98
.195
3.32
5.63
17Walter Johnson
W. Johnson
0.00
68.1
August 1912
12
8
2
.800
6
61
5
2
1
40
11
0
13
1
6
2
8.03
1.71
4.69
0.00
5.2
0.78
.230
1.45
5.27
18Buck O'Brien
B. O'Brien
0.00
59.2
July 1912
7
5
2
.714
6
20
6
1
0
41
13
1
7
1
1
223
1
3.02
1.06
2.86
0.15
9.0
3.1
0.80
.206
1.96
6.18
19Eddie Plank
E. Plank
0.00
44.0
July 1912
7
5
2
.714
5
14
4
0
0
39
19
0
13
0
2
179
1
2.86
2.66
1.08
0.00
7.8
7.3
1.18
.257
3.89
7.98
20Joe Wood
J. Wood
0.00
51.2
July 1912
7
5
1
.833
6
42
5
1
0
41
15
0
10
4
1
204
3
7.32
1.74
4.20
0.00
20.6
4.9
0.99
.277
2.61
7.14
21Hippo Vaughn
H. Vaughn
0.00
46.2
July 1912
7
4
0
1.000
5
34
3
0
0
39
16
0
22
2
2
195
7
6.56
4.24
1.55
0.00
17.4
11.3
1.31
.285
3.09
7.52
22Jim Baskette
J. Baskette
0.00
35.2
July 1912
6
1
2
.333
2
16
2
0
1
38
24
0
12
4
4
162
2
4.04
3.03
1.33
0.00
9.9
7.4
1.40
.292
6.06
9.59
23Jean Dubuc
J. Dubuc
0.00
63.0
July 1912
8
7
0
1.000
6
18
6
1
1
48
21
0
36
1
2
4
2.57
5.14
0.50
0.00
13.5
1.33
.227
3.00
6.86
24Byron Houck
B. Houck
0.00
70.2
July 1912
9
4
3
.571
8
32
7
0
0
58
32
0
25
4
1
294
1
4.08
3.18
1.28
0.00
10.9
8.5
1.17
.249
4.08
7.39
25Tom Hughes
T. Hughes
0.00
45.1
July 1912
7
3
2
.600
6
25
2
1
0
49
23
1
18
2
1
195
0
4.96
3.57
1.39
0.20
12.8
9.2
1.48
.322
4.57
9.73

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