most earned runs per game allowed by a team in a season since 1901

Since 1901, the Philadelphia Phillies have the most earned runs per game pitched by a team in a season, with 6.56 in 1930.

	TEAM	ER/G	ER	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Phillies	6.56	1,024	156	1930	.338	52	102	156	6.71	384	54	3	7	1372.2	1,993	1,199	142	543	33		6,549	23	2.52	3.56	0.71	0.93	5.9	8.3	1.85	.340	7.86	13.07
2	Tigers	6.27	1,015	162	1996	.327	53	109	162	6.38	957	10	4	22	1432.2	1,699	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
3	Browns	6.03	935	155	1936	.375	57	95	155	6.24	399	54	3	13	1348.1	1,776	1,064	115	609	47		6,382	44	2.66	4.07	0.66	0.77	6.3	9.5	1.77	.319	7.10	11.85
4	Phillies	5.96	918	154	1929	.464	71	82	154	6.13	369	45	5	24	1348.0	1,743	1,036	122	616	39		6,303	21	2.46	4.11	0.60	0.81	5.9	9.8	1.75	.314	6.92	11.64
5	Athletics	5.93	913	154	1936	.346	53	100	154	6.08	405	68	3	11	1352.1	1,645	1,045	131	696	24		6,301	67	2.70	4.63	0.58	0.87	6.4	11.0	1.73	.300	6.95	10.95
6	Rockies	5.9	955	162	1999	.444	72	90	162	6.01	1,032	12	1	33	1429.0	1,700	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
7	Browns	5.87	916	156	1939	.279	43	111	156	6.01	516	56	3	4	1371.1	1,724	1,035	133	739	29		6,474	32	3.39	4.85	0.70	0.87	8.0	11.4	1.80	.315	6.79	11.31
8	Browns	5.83	909	156	1937	.299	46	108	156	6.00	468	55	2	8	1363.0	1,770	1,023	143	653	30		6,371	34	3.09	4.31	0.72	0.94	7.3	10.2	1.78	.320	6.75	11.69
9	Athletics	5.68	375	66	2025	.379	25	41	66	5.77	523	0	0	15	585.1	638	403	101	265	35	9	2,659	14	8.04	4.07	1.97	1.55	19.7	10.0	1.54	.310	6.20	9.81
10	Twins	5.66	815	144	1995	.389	56	88	144	5.76	790	7	2	27	1272.2	1,450	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
11	Athletics	5.65	864	153	1939	.362	55	97	153	5.79	397	50	6	12	1342.2	1,687	1,022	148	579	19		6,248	35	2.66	3.88	0.69	0.99	6.4	9.3	1.69	.301	6.85	11.31
12	Rangers	5.64	913	162	2001	.451	73	89	162	5.71	951	4	1	37	1438.1	1,670	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
13	Orioles	5.62	910	162	2021	.321	52	110	162	5.84	1,234	1	1	26	1402.0	1,518	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
14	Twins	5.61	634	113	1994	.469	53	60	113	5.68	602	6	2	29	1005.0	1,197	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
15	Rangers	5.57	903	162	2003	.438	71	91	162	5.67	1,009	4	2	43	1433.1	1,625	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
16	Browns	5.56	867	156	1938	.362	55	97	156	5.80	632	71	3	7	1344.2	1,584	962	132	737	26		6,222	27	4.23	4.93	0.86	0.88	10.2	11.8	1.73	.309	6.44	10.60
17	Orioles	5.54	897	162	2019	.333	54	108	162	5.59	1,248	0	0	27	1443.0	1,544	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
18	Royals	5.53	896	162	2006	.383	62	100	162	5.65	904	3	2	35	1426.1	1,648	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
19	Rockies	5.52	895	162	2019	.438	71	91	162	5.56	1,264	1	1	28	1448.2	1,576	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
20	Phillies	5.52	839	152	1928	.283	43	109	152	5.61	402	42	4	13	1346.2	1,664	956	108	675	42		6,224	22	2.69	4.51	0.60	0.72	6.5	10.8	1.74	.311	6.39	11.12
21	Rockies	5.5	891	162	2023	.364	59	103	162	5.67	1,129	0	0	31	1414.0	1,599	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
22	Rockies	5.46	884	162	1996	.512	83	79	162	5.59	932	5	1	34	1422.2	1,597	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
23	Rockies	5.45	883	162	2004	.420	68	94	162	5.54	947	3	0	36	1435.1	1,634	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
24	Rockies	5.45	327	60	2020	.433	26	34	60	5.59	393	1	0	16	526.1	579	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
25	Rangers	5.44	620	114	1994	.456	52	62	114	5.45	683	10	3	26	1023.0	1,176	697	157	394	32	29	4,595	50	6.01	3.47	1.73	1.38	14.9	8.6	1.53	.306	6.13	10.35