mlb most runs allowed per game by a team in a month since 1920

Since 1920, the Philadelphia Phillies have allowed the most runs by a team in a month, with 288 runs in July 1930.

	TEAM	R	G	MONTH	W%	W	L	ERA	SO	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	288	33	July 1930	.242	8	25	0.00	65	0	0	295.2	452	0	38	116	7		1,439	4	1.98	3.53	0.56	1.16	4.5	8.1	1.92	.341	8.77	13.76
2	Athletics	272	33	July 1936	.242	8	25	0.00	69	1	1	284.1	419	0	19	136	7		1,377	22	2.18	4.30	0.51	0.60	5.0	9.9	1.95	.349	8.61	13.26
3	Browns	265	35	July 1936	.382	13	21	0.00	99	0	1	305.0	440	0	33	136	13		1,483	7	2.92	4.01	0.73	0.97	6.7	9.2	1.89	.339	7.82	12.98
4	Athletics	260	40	August 1938	.375	15	25	0.00	128	0	6	352.0	433	0	43	150	7		1,629	3	3.27	3.84	0.85	1.10	7.9	9.2	1.66	.300	6.65	11.07
5	Indians	257	38	August 1938	.395	15	23	0.00	163	0	4	332.2	416	0	25	186	7		1,580	13	4.41	5.03	0.88	0.68	10.3	11.8	1.81	.326	6.95	11.25
6	Phillies	243	29	July 1929	.345	10	19	0.00	59	0	4	253.0	362	0	34	124	7		1,208	5	2.10	4.41	0.48	1.21	4.9	10.3	1.92	.333	8.64	12.88
7	Phillies	241	32	June 1929	.290	9	22	0.00	88	3	1	272.0	360	0	32	147	10		1,316	4	2.91	4.86	0.60	1.06	6.7	11.2	1.86	.316	7.97	11.91
8	Browns	235	33	July 1927	.375	12	20	0.00	92	0	1	291.0	378	0	28	129	7		1,357	6	2.85	3.99	0.71	0.87	6.8	9.5	1.74	.318	7.27	11.69
9	Phillies	234	35	August 1930	.303	10	23	0.00	95	1	2	314.2	424	0	22	111	6		1,453	6	2.72	3.17	0.86	0.63	6.5	7.6	1.70	.330	6.69	12.13
10	Browns	232	31	June 1950	.419	13	18	6.64	85	1	5	280.2	328	207	40	136	6		1,292	3	2.73	4.36	0.63	1.28	6.6	10.5	1.65	.281	7.44	10.52
11	Red Sox	232	35	July 1923	.324	11	23	0.00	89	0	3	305.1	392	0	16	130	17		1,424	9	2.62	3.83	0.68	0.47	6.3	9.1	1.71	.321	6.84	11.55
12	Phillies	232	30	May 1923	.233	7	23	0.00	71	0	1	269.1	380	0	30	124	9		1,285	13	2.37	4.14	0.57	1.00	5.5	9.6	1.87	.333	7.75	12.70
13	Athletics	229	28	April 2023	.179	5	23	7.97	206	0	2	245.0	300	217	50	141	24	4	1,176	18	7.57	5.18	1.46	1.84	17.5	12.0	1.80	.331	8.41	11.02
14	Athletics	229	29	July 1939	.286	8	20	0.00	81	1	3	255.2	370	0	27	116	4		1,238	13	2.85	4.08	0.70	0.95	6.5	9.4	1.90	.340	8.06	13.02
15	Phillies	228	32	June 1945	.250	8	24	0.00	78	0	4	286.1	383	0	12	112	4		1,354	12	2.45	3.52	0.70	0.38	5.8	8.3	1.73	.323	7.17	12.04
16	Phillies	228	26	September 1930	.385	10	16	0.00	59	1	2	232.2	384	0	25	95	6		1,139	2	2.28	3.67	0.62	0.97	5.2	8.3	2.06	.376	8.82	14.85
17	Browns	227	34	July 1930	.382	13	21	0.00	96	0	2	306.2	396	0	30	109	3		1,392	4	2.82	3.20	0.88	0.88	6.9	7.8	1.65	.317	6.66	11.62
18	Yankees	225	35	July 1930	.486	17	18	0.00	133	0	4	306.2	392	0	22	132	7		1,443	5	3.90	3.87	1.01	0.65	9.2	9.1	1.71	.322	6.60	11.50
19	Browns	224	33	July 1932	.333	11	22	0.00	112	0	2	290.0	357	0	24	126	5		1,328	8	3.48	3.91	0.89	0.74	8.4	9.5	1.67	.314	6.95	11.08
20	Browns	223	30	July 1953	.233	7	23	6.11	128	0	3	271.0	339	184	23	136	3		1,264	11	4.25	4.52	0.94	0.76	10.1	10.8	1.75	.324	7.41	11.26
21	Athletics	223	32	August 1939	.313	10	22	0.00	76	3	1	276.0	369	0	35	139	5		1,325	8	2.48	4.53	0.55	1.14	5.7	10.5	1.84	.312	7.27	12.03
22	White Sox	223	34	July 1924	.441	15	19	0.00	79	1	4	298.0	378	0	22	109	6		1,361	3	2.39	3.29	0.72	0.66	5.8	8.0	1.63	.311	6.73	11.42
23	Rockies	221	29	May 1993	.241	7	22	7.03	164	0	4	258.2	343	202	38	119	8	10	1,221	16	5.71	4.14	1.38	1.32	13.4	9.7	1.79	.342	7.69	11.93
24	Red Sox	221	30	July 1925	.200	6	24	0.00	61	0	2	256.1	383	0	20	98	7		1,224	1	2.14	3.44	0.62	0.70	5.0	8.0	1.88	.350	7.76	13.45
25	Phillies	221	34	September 1922	.412	14	20	0.00	100	0	1	310.2	389	0	17	87	12		1,391	11	2.90	2.52	1.15	0.49	7.2	6.3	1.53	.317	6.40	11.27