lowest era by a team in a season since 1947

Since 1947, the Chicago White Sox have the best ERA by a team in a season, with an ERA of 2.45 in 1967.

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	White Sox	2.45	1967	162	.549	89	73	162	927	36	17	39	1490.1	1,197	406	491	87	465	58	46	6,074	54	5.60	2.81	1.99	0.53	15.3	7.7	1.12	.245	2.97	7.23
2	Cardinals	2.49	1968	162	.599	97	65	162	971	63	27	32	1479.0	1,282	409	472	82	375	28	62	6,006	30	5.91	2.28	2.59	0.50	16.2	6.2	1.12	.264	2.87	7.80
3	Orioles	2.53	1972	154	.519	80	74	154	788	62	18	21	1371.2	1,116	386	430	85	395	15	52	5,493	35	5.17	2.59	1.99	0.56	14.3	7.2	1.10	.245	2.82	7.32
4	Athletics	2.58	1972	155	.600	93	62	155	862	42	15	43	1417.2	1,170	406	457	96	418	19	41	5,718	29	5.47	2.65	2.06	0.61	15.1	7.3	1.12	.248	2.90	7.43
5	Dodgers	2.62	1966	162	.586	95	67	162	1,084	52	13	34	1458.0	1,287	425	490	84	356	27	67	5,941	42	6.69	2.20	3.04	0.52	18.2	6.0	1.13	.274	3.02	7.94
6	Indians	2.66	1968	162	.534	86	75	162	1,157	48	20	32	1464.1	1,087	432	504	98	540	53	64	5,966	42	7.11	3.32	2.14	0.60	19.4	9.1	1.11	.240	3.10	6.68
7	Orioles	2.66	1968	162	.562	91	71	162	1,044	53	15	31	1451.0	1,111	429	497	101	502	46	42	5,864	53	6.48	3.11	2.08	0.63	17.8	8.6	1.11	.242	3.08	6.89
8	Astros	2.66	1981	110	.555	61	49	110	610	23	13	25	990.0	842	293	331	40	300	11	24	4,034	36	5.55	2.73	2.03	0.36	15.1	7.4	1.15	.261	3.01	7.65
9	White Sox	2.68	1966	163	.512	83	79	163	896	38	19	34	1475.1	1,229	440	517	101	403	36	55	5,982	68	5.47	2.46	2.22	0.62	15.0	6.7	1.11	.248	3.15	7.50
10	Dodgers	2.69	1968	162	.469	76	86	162	994	38	20	32	1449.1	1,293	433	509	65	414	37	79	5,951	43	6.17	2.57	2.40	0.40	16.7	7.0	1.18	.277	3.16	8.03
11	Giants	2.71	1968	163	.543	88	74	163	942	77	19	16	1468.2	1,302	442	529	86	344	24	87	5,990	56	5.77	2.11	2.74	0.53	15.7	5.7	1.12	.265	3.24	7.98
12	Tigers	2.71	1968	164	.636	103	59	164	1,115	59	16	29	1489.2	1,180	449	492	129	486	32	40	6,043	38	6.74	2.94	2.29	0.78	18.5	8.0	1.12	.246	2.97	7.13
13	White Sox	2.72	1964	162	.605	98	64	162	955	44	16	45	1467.2	1,216	444	501	124	401	31	42	5,910	49	5.86	2.46	2.38	0.76	16.2	6.8	1.10	.248	3.07	7.46
14	Mets	2.72	1968	163	.451	73	89	163	1,014	45	17	33	1483.1	1,250	449	499	87	430	45	67	6,028	59	6.15	2.61	2.36	0.53	16.8	7.1	1.13	.261	3.03	7.58
15	Pirates	2.74	1968	163	.494	80	82	163	897	42	17	30	1487.1	1,322	453	532	73	485	36	61	6,140	51	5.43	2.93	1.85	0.44	14.6	7.9	1.21	.269	3.22	8.00
16	White Sox	2.75	1968	162	.414	67	95	162	834	20	4	40	1468.0	1,290	448	527	97	451	66	69	6,080	40	5.11	2.76	1.85	0.59	13.7	7.4	1.19	.258	3.23	7.91
17	Indians	2.78	1954	156	.721	111	43	156	678	77	12	38	1419.1	1,220	439	504	89	486	16		5,866	13	4.30	3.08	1.40	0.56	11.6	8.3	1.20	.246	3.20	7.74
18	Dodgers	2.78	1972	155	.548	85	70	155	856	50	21	29	1403.0	1,196	434	527	83	429	34	36	5,795	43	5.49	2.75	2.00	0.53	14.8	7.4	1.16	.253	3.38	7.67
19	Yankees	2.79	1968	164	.512	83	79	164	831	45	11	27	1467.1	1,308	455	531	99	424	30	62	6,032	27	5.10	2.60	1.96	0.61	13.8	7.0	1.18	.260	3.26	8.02
20	Dodgers	2.80	2022	162	.685	111	51	162	1,465	1	1	43	1451.1	1,114	451	513	152	407	75	13	5,865	38	9.08	2.52	3.60	0.94	25.0	6.9	1.05	.255	3.18	6.91
21	Pirates	2.81	1972	155	.619	96	59	155	838	39	9	48	1414.1	1,282	441	512	90	433	29	60	5,845	34	5.33	2.76	1.94	0.57	14.3	7.4	1.21	.268	3.26	8.16
22	Dodgers	2.81	1965	162	.599	97	65	162	1,079	58	17	35	1476.0	1,223	461	521	127	425	33	53	6,018	51	6.58	2.59	2.54	0.77	17.9	7.1	1.12	.252	3.18	7.46
23	Orioles	2.83	1969	162	.673	109	53	162	897	50	19	36	1473.2	1,194	463	517	117	498	22	55	5,972	34	5.48	3.04	1.80	0.71	15.0	8.3	1.15	.243	3.16	7.29
24	Twins	2.84	1972	154	.500	77	77	154	838	37	11	34	1399.1	1,188	441	535	105	444	37	42	5,750	26	5.39	2.86	1.89	0.68	14.6	7.7	1.17	.250	3.44	7.64
25	Dodgers	2.85	1963	163	.611	99	63	163	1,095	51	20	29	1469.2	1,329	466	550	111	402	33	74	6,083	45	6.71	2.46	2.72	0.68	18.0	6.6	1.18	.274	3.37	8.14