highest team era since 1947 in single season

Since 1947, the Detroit Tigers have the highest ERA by a team in a season, with an ERA of 6.38 in 1996.

	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	Tigers	6.38	1996	162	.327	53	109	162	957	10	4	22	1432.2	1,699	1,015	1,103	241	784	80	63	6,713	82	6.01	4.93	1.22	1.51	14.3	11.7	1.73	.313	6.93	10.67
2	Rockies	6.01	1999	162	.444	72	90	162	1,032	12	1	33	1429.0	1,700	955	1,028	237	737	60	46	6,574	70	6.50	4.64	1.40	1.49	15.7	11.2	1.71	.325	6.47	10.71
3	Rockies	5.97	2025	162	.265	43	119	162	1,093	0	0	29	1407.1	1,673	933	1,021	251	554	73	19	6,367	60	6.99	3.54	1.97	1.61	17.2	8.7	1.58	.323	6.53	10.70
4	Orioles	5.84	2021	162	.321	52	110	162	1,234	1	1	26	1402.0	1,518	910	956	258	563	68	12	6,252	88	7.92	3.61	2.19	1.66	19.7	9.0	1.48	.305	6.14	9.74
5	Twins	5.76	1995	144	.389	56	88	144	790	7	2	27	1272.2	1,450	815	889	210	533	36	18	5,714	52	5.59	3.77	1.48	1.49	13.8	9.3	1.56	.299	6.29	10.25
6	Rangers	5.71	2001	162	.451	73	89	162	951	4	1	37	1438.1	1,670	913	968	222	596	63	33	6,469	70	5.95	3.73	1.60	1.39	14.7	9.2	1.58	.312	6.06	10.45
7	Twins	5.68	1994	113	.469	53	60	113	602	6	2	29	1005.0	1,197	634	688	153	388	31	20	4,507	43	5.39	3.47	1.55	1.37	13.4	8.6	1.58	.313	6.16	10.72
8	Rockies	5.67	2023	162	.364	59	103	162	1,129	0	0	31	1414.0	1,599	891	957	234	586	86	13	6,316	51	7.19	3.73	1.93	1.49	17.9	9.3	1.55	.319	6.09	10.18
9	Rangers	5.67	2003	162	.438	71	91	162	1,009	4	2	43	1433.1	1,625	903	969	208	603	63	45	6,413	51	6.34	3.79	1.67	1.31	15.7	9.4	1.55	.313	6.08	10.20
10	Royals	5.65	2006	162	.383	62	100	162	904	3	2	35	1426.1	1,648	896	971	213	637	60	45	6,434	85	5.70	4.02	1.42	1.34	14.1	9.9	1.60	.311	6.13	10.40
11	Tigers	5.63	2020	58	.397	23	35	58	444	1	0	11	492.1	511	308	318	91	192	34	2	2,174	18	8.12	3.51	2.31	1.66	20.4	8.8	1.43	.297	5.81	9.34
12	Orioles	5.59	2019	162	.333	54	108	162	1,248	0	0	27	1443.0	1,544	897	981	305	561	80	11	6,396	75	7.78	3.50	2.22	1.90	19.5	8.8	1.46	.295	6.12	9.63
13	Rockies	5.59	1996	162	.512	83	79	162	932	5	1	34	1422.2	1,597	884	964	198	624	69	19	6,391	66	5.90	3.95	1.49	1.25	14.6	9.8	1.56	.306	6.10	10.10
14	Rockies	5.59	2020	60	.433	26	34	60	393	1	0	16	526.1	579	327	353	83	205	40	5	2,335	29	6.72	3.51	1.92	1.42	16.8	8.8	1.49	.307	6.04	9.90
15	Red Sox	5.58	2020	60	.400	24	36	60	537	0	0	14	524.0	587	325	351	98	252	31	4	2,389	28	9.22	4.33	2.13	1.68	22.5	10.5	1.60	.332	6.03	10.08
16	Rockies	5.56	2019	162	.438	71	91	162	1,264	1	1	28	1448.2	1,576	895	958	270	589	57	33	6,423	63	7.85	3.66	2.15	1.68	19.7	9.2	1.49	.308	5.95	9.79
17	Rockies	5.54	2004	162	.420	68	94	162	947	3	0	36	1435.1	1,634	883	923	198	697	71	84	6,535	66	5.94	4.37	1.36	1.24	14.5	10.7	1.62	.311	5.79	10.25
18	Devil Rays	5.53	2007	162	.407	66	96	162	1,194	2	1	28	1429.2	1,649	879	944	199	568	63	31	6,403	55	7.52	3.58	2.10	1.25	18.6	8.9	1.55	.331	5.94	10.38
19	Rangers	5.52	2000	162	.438	71	91	162	918	3	0	39	1429.0	1,683	876	974	202	661	63	40	6,559	40	5.78	4.16	1.39	1.27	14.0	10.1	1.64	.314	6.13	10.60
20	Tigers	5.49	1995	144	.417	60	84	144	729	5	1	38	1275.0	1,509	778	844	170	536	45	79	5,774	67	5.15	3.78	1.36	1.20	12.6	9.3	1.60	.312	5.96	10.65
21	Royals	5.49	2005	162	.346	56	106	162	924	4	0	25	1413.1	1,640	862	935	178	580	74	33	6,370	69	5.88	3.69	1.59	1.13	14.5	9.1	1.57	.317	5.95	10.44
22	Athletics	5.49	1950	154	.338	52	102	154	466	50	3	18	1346.1	1,528	821	913	138	729	30		6,167	40	3.12	4.87	0.64	0.92	7.6	11.8	1.68	.289	6.10	10.21
23	Athletics	5.48	2023	162	.309	50	112	162	1,300	0	0	28	1419.2	1,464	865	924	213	694	100	33	6,384	76	8.24	4.40	1.87	1.35	20.4	10.9	1.52	.307	5.86	9.28
24	Athletics	5.48	1997	162	.401	65	97	162	953	2	0	38	1445.1	1,734	880	946	197	642	64	54	6,600	51	5.93	4.00	1.48	1.23	14.4	9.7	1.64	.324	5.89	10.80
25	Royals	5.48	2000	162	.475	77	85	162	927	10	3	29	1439.1	1,585	876	930	239	693	42	35	6,443	77	5.80	4.33	1.34	1.49	14.4	10.8	1.58	.296	5.82	9.91