best era in a month in the nl minimum 30 ip

8 teams are tied for the best ERA by an NL team when pitching at least 30 innings in a month, with an ERA of 0.00. The first three are the Boston Braves 5 times and the Chicago Cubs and the Cincinnati Reds 4 times.

	TEAM	ERA	IP	MONTH	G	W%	W	L	SO	SHO	SV	H	ER	R	HR	BB	HBP	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Braves	0.00	33.0	October 1948	4	.750	3	1	17	0	2	30	0	11	2	9	0	136	0	4.64	2.45	1.89	0.55	12.5	6.6	1.18	.259	3.00	8.18
2	Braves	0.00	224.0	September 1948	24	.750	18	6	92	2	2	192	0	60	11	47	2	895	2	3.70	1.89	1.96	0.44	10.3	5.3	1.07	.244	2.41	7.71
3	Cubs	0.00	232.0	September 1948	27	.407	11	16	94	1	2	213	0	125	11	115	2	1,015	2	3.65	4.46	0.82	0.43	9.3	11.3	1.41	.255	4.85	8.26
4	Reds	0.00	239.2	September 1948	28	.393	11	17	100	0	3	286	0	147	13	104	5	1,088	5	3.76	3.91	0.96	0.49	9.2	9.6	1.63	.315	5.52	10.74
5	Pirates	0.00	276.0	September 1948	32	.500	16	16	95	0	2	305	0	152	27	90	5	1,190	8	3.10	2.93	1.06	0.88	8.0	7.6	1.43	.286	4.96	9.95
6	Giants	0.00	279.2	September 1948	31	.548	17	14	108	1	4	283	0	123	22	105	8	1,210	6	3.48	3.38	1.03	0.71	8.9	8.7	1.39	.270	3.96	9.11
7	Phillies	0.00	261.0	September 1948	29	.345	10	19	127	0	1	246	0	129	19	110	1	1,127	5	4.38	3.79	1.15	0.66	11.3	9.8	1.36	.261	4.45	8.48
8	Dodgers	0.00	267.0	September 1948	29	.517	15	14	121	3	1	233	0	101	19	106	7	1,101	2	4.08	3.57	1.14	0.64	11.0	9.6	1.27	.252	3.40	7.85
9	Cardinals	0.00	224.2	September 1948	26	.577	15	11	98	3	2	200	0	72	9	62	3	904	1	3.93	2.48	1.58	0.36	10.8	6.9	1.17	.261	2.88	8.01
10	Pirates	0.00	260.0	August 1948	29	.690	20	9	92	0	5	265	0	126	20	97	4	1,120	6	3.18	3.36	0.95	0.69	8.2	8.7	1.39	.270	4.36	9.17
11	Phillies	0.00	219.2	August 1948	26	.269	7	19	98	1	1	230	0	122	17	80	2	960	5	4.02	3.28	1.23	0.70	10.2	8.3	1.41	.279	5.00	9.42
12	Cubs	0.00	247.2	August 1948	28	.464	13	15	106	2	1	254	0	111	16	103	8	1,066	8	3.85	3.74	1.03	0.58	9.9	9.7	1.44	.286	4.03	9.23
13	Reds	0.00	233.1	August 1948	27	.407	11	16	108	2	3	222	0	113	20	80	4	989	2	4.17	3.09	1.35	0.77	10.9	8.1	1.29	.260	4.36	8.56
14	Giants	0.00	231.1	August 1948	27	.370	10	17	92	1	5	279	0	152	23	90	5	1,056	5	3.58	3.50	1.02	0.89	8.7	8.5	1.60	.303	5.91	10.85
15	Dodgers	0.00	282.1	August 1948	31	.645	20	11	153	2	6	256	0	107	20	103	6	1,187	8	4.88	3.28	1.49	0.64	12.9	8.7	1.27	.261	3.41	8.16
16	Braves	0.00	276.2	August 1948	31	.452	14	17	128	1	3	275	0	121	18	78	5	1,168	3	4.16	2.54	1.64	0.59	11.0	6.7	1.28	.274	3.94	8.95
17	Cardinals	0.00	297.2	August 1948	33	.636	21	12	131	3	5	295	0	132	17	87	1	1,260	4	3.96	2.63	1.51	0.51	10.4	6.9	1.28	.271	3.99	8.92
18	Braves	0.00	281.2	July 1948	31	.633	19	11	118	0	3	276	0	119	20	89	1	1,190	3	3.77	2.84	1.33	0.64	9.9	7.5	1.30	.266	3.80	8.82
19	Cubs	0.00	290.0	July 1948	33	.375	12	20	138	1	2	314	0	165	24	114	3	1,275	6	4.28	3.54	1.21	0.74	10.8	8.9	1.48	.291	5.12	9.74
20	Reds	0.00	271.0	July 1948	31	.387	12	19	116	3	5	300	0	165	26	117	2	1,220	3	3.85	3.89	0.99	0.86	9.5	9.6	1.54	.286	5.48	9.96
21	Pirates	0.00	260.0	July 1948	30	.448	13	16	96	1	3	240	0	115	23	109	3	1,106	8	3.32	3.77	0.88	0.80	8.7	9.9	1.34	.248	3.98	8.31
22	Giants	0.00	277.0	July 1948	31	.581	18	13	103	6	2	277	0	131	26	104	4	1,188	5	3.35	3.38	0.99	0.84	8.7	8.8	1.38	.264	4.26	9.00
23	Phillies	0.00	279.2	July 1948	32	.484	15	16	88	0	5	310	0	171	22	100	9	1,238	5	2.83	3.22	0.88	0.71	7.1	8.1	1.47	.283	5.50	9.98
24	Dodgers	0.00	279.2	July 1948	31	.677	21	10	128	2	8	274	0	146	30	129	3	1,213	7	4.12	4.15	0.99	0.97	10.6	10.6	1.44	.264	4.70	8.82
25	Cardinals	0.00	256.0	July 1948	29	.414	12	17	134	0	1	275	0	156	24	115	2	1,124	7	4.71	4.04	1.17	0.84	11.9	10.2	1.52	.296	5.48	9.67