most runs per game allowed in a season by a team in the modern era

Since 1900, the Philadelphia Phillies have the most runs allowed per game pitched by a team in a season, with 7.69 in 1930.

	TEAM	R/G	R	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Phillies	7.69	1,199	156	1930	.338	52	102	156	6.71	384	54	3	7	1372.2	1,993	1,024	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	Browns	6.86	1,064	155	1936	.375	57	95	155	6.24	399	54	3	13	1348.1	1,776	935	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
3	Tigers	6.81	1,103	162	1996	.327	53	109	162	6.38	957	10	4	22	1432.2	1,699	1,015	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
4	Athletics	6.79	1,045	154	1936	.346	53	100	154	6.08	405	68	3	11	1352.1	1,645	913	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
5	Phillies	6.73	1,036	154	1929	.464	71	82	154	6.13	369	45	5	24	1348.0	1,743	918	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
6	Athletics	6.68	1,022	153	1939	.362	55	97	153	5.79	397	50	6	12	1342.2	1,687	864	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
7	Browns	6.63	1,035	156	1939	.279	43	111	156	6.01	516	56	3	4	1371.1	1,724	916	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	6.56	1,023	156	1937	.299	46	108	156	6.00	468	55	2	8	1363.0	1,770	909	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	Rustlers	6.54	1,021	156	1911	.291	44	107	156	5.08	486	73	5	7	1374.0	1,570	776	76	672	56		6,026	36	3.18	4.40	0.72	0.50	8.1	11.2	1.63	.315	6.69	10.28
10	Phillies	6.5	1,008	155	1923	.325	50	104	155	5.34	384	68	3	8	1376.1	1,801	816	100	549	38		6,332	41	2.51	3.59	0.70	0.65	6.1	8.7	1.71	.323	6.59	11.78
11	Rockies	6.35	1,028	162	1999	.444	72	90	162	6.01	1,032	12	1	33	1429.0	1,700	955	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
12	Phillies	6.29	956	152	1928	.283	43	109	152	5.61	402	42	4	13	1346.2	1,664	839	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
13	Athletics	6.21	956	154	1938	.349	53	99	154	5.48	473	56	3	12	1324.0	1,573	806	142	599	18		6,085	28	3.22	4.07	0.79	0.97	7.8	9.8	1.64	.295	6.50	10.69
14	White Sox	6.18	945	153	1934	.349	53	99	153	5.41	506	72	5	8	1355.0	1,599	814	139	628	21		6,228	44	3.36	4.17	0.81	0.92	8.1	10.1	1.64	.296	6.28	10.62
15	Twins	6.17	889	144	1995	.389	56	88	144	5.76	790	7	2	27	1272.2	1,450	815	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
16	Browns	6.17	962	156	1938	.362	55	97	156	5.80	632	71	3	7	1344.2	1,584	867	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	Rangers	6.11	697	114	1994	.456	52	62	114	5.45	683	10	3	26	1023.0	1,176	620	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
18	Twins	6.09	688	113	1994	.469	53	60	113	5.68	602	6	2	29	1005.0	1,197	634	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
19	Phillies	6.08	930	153	1925	.444	68	85	153	5.02	371	69	8	9	1350.2	1,753	754	117	444	22		6,163	33	2.47	2.96	0.84	0.78	6.0	7.2	1.63	.314	6.20	11.68
20	Red Sox	6.06	921	152	1925	.309	47	105	152	4.97	310	68	6	6	1326.2	1,615	732	67	510	39		6,025	14	2.10	3.46	0.61	0.45	5.1	8.5	1.60	.304	6.25	10.96
21	Orioles	6.06	981	162	2019	.333	54	108	162	5.59	1,248	0	0	27	1443.0	1,544	897	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
22	Athletics	6.05	932	154	1940	.351	54	100	154	5.22	488	72	4	12	1345.0	1,543	780	135	534	15		6,090	40	3.27	3.57	0.91	0.90	8.0	8.8	1.54	.286	6.24	10.32
23	Pirates	6.03	928	154	1930	.519	80	74	154	5.24	393	80	7	13	1361.1	1,730	793	128	438	29		6,167	25	2.60	2.90	0.90	0.85	6.4	7.1	1.59	.309	6.14	11.44
24	Blues	6.02	831	138	1901	.397	54	82	138	4.12	334	122	7	4	1182.1	1,365	541	22	464	71		5,312	42	2.54	3.53	0.72	0.17	6.3	8.7	1.55	.304	6.33	10.39
25	White Sox	6.02	939	156	1931	.366	56	97	156	5.04	421	54	6	11	1390.1	1,613	778	82	588	33		6,332	20	2.73	3.81	0.72	0.53	6.6	9.3	1.58	.294	6.08	10.44