The New York Giants have the most wins by a team in a month, with 29 wins in September 1916.

	TEAM	W	MONTH	L	W%	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Giants	29	September 1916	5	.853	36	1,130	154	302	41	17	13	126	80	7	127	54		1,247	416	71	30				.267	.320	.368	.688
2	Yankees	28	August 1938	8	.778	36	1,267	275	349	65	20	51	261	219	10	154	23		1,511	607	136	15				.275	.386	.479	.865
3	Indians	26	August 1954	6	.813	32	1,058	149	283	41	5	28	143	132	6	121	8	12	1,225	418	74	22	7		24	.267	.350	.395	.745
4	Cubs	26	July 1945	6	.813	32	1,115	183	341	58	11	11	166	128	6	87	14		1,278	454	80	29			16	.306	.380	.407	.787
5	Cardinals	26	July 1944	7	.788	33	1,180	190	346	64	16	19	177	110	6	78	8		1,329	499	99	33			22	.293	.356	.423	.779
6	Cubs	26	July 1935	8	.765	34	1,265	236	390	82	10	24	219	98	8	81	25		1,404	564	116	33				.308	.362	.446	.808
7	Athletics	26	July 1931	7	.788	34	1,188	194	355	76	19	28	177	110	6	133	6		1,318	553	123	14				.299	.361	.465	.827
8	Braves	26	September 1914	5	.839	34	1,112	183	309	64	13	5		121	13	133	26		1,304	414	82	58				.278	.356	.372	.728
9	Cubs	26	August 1906	3	.897	29	883	140	244	29	10	2		92	8		38		1,039	299	41	56				.276	.350	.339	.689
10	Indians	25	September 2017	4	.862	29	1,001	164	283	68	7	44	158	103	15	180	12	3	1,132	497	119	0	13	7	22	.283	.354	.497	.851
11	Royals	25	September 1977	5	.833	30	1,062	170	322	52	17	30	160	98	10	120	41	20	1,194	498	99	15	9	14	27	.303	.365	.469	.834
12	Orioles	25	June 1966	8	.758	33	1,185	189	336	58	10	40	178	108	4	154	5	12	1,322	534	108	13	12	13	32	.284	.342	.451	.793
13	Dodgers	25	August 1953	6	.806	31	1,086	206	330	48	9	49	199	139	5	140	12	13	1,246	543	106	16			25	.304	.385	.500	.885
14	Red Sox	25	July 1948	9	.735	34	1,127	212	312	68	9	27	205	183	8	115	8		1,332	479	104	14			31	.277	.382	.425	.807
15	Dodgers	25	July 1947	8	.758	34	1,141	195	327	57	14	18	181	168	6	117	18		1,349	466	89	34			21	.287	.381	.408	.789
16	Cardinals	25	August 1942	8	.758	34	1,213	171	332	57	13	10	154	121	4	108	24		1,364	445	80	26			23	.274	.342	.367	.708
17	Yankees	25	July 1941	4	.862	29	1,036	172	301	56	10	35	163	125	7	97	12		1,179	482	101	11			18	.291	.371	.465	.836
18	Pirates	25	July 1932	13	.658	38	1,369	192	404	65	21	12	175	88	9	97	10		1,492	547	98	26				.295	.342	.400	.741
19	Giants	25	September 1928	8	.758	33	1,193	184	367	58	10	28	174	93	11	79	11		1,335	529	96	38				.308	.363	.443	.807
20	Athletics	25	July 1928	8	.758	33	1,125	203	373	89	7	31	197	129	7	67	7		1,308	569	127	47				.332	.404	.506	.909
21	Giants	25	July 1913	6	.806	31	1,020	140	289	51	14	7	126	90	18	84	59		1,150	389	72	22				.283	.352	.381	.733
22	Pirates	25	September 1908	8	.758	33	1,106	155	294	30	14	4		91	13		50		1,258	364	48	48				.266	.329	.329	.658
23	Pirates	25	September 1901	7	.781	32	1,137	226	363	59	22	8	197	115	14	76	37		1,289	490	89	23				.319	.389	.431	.820
24	Dodgers	24	August 2023	5	.828	29	989	176	290	71	1	44	173	107	13	214	23	5	1,123	495	116	1	13	6	23	.293	.365	.501	.866
25	Athletics	24	August 2002	4	.857	28	998	164	278	55	10	40	161	93	14	148	7	5	1,112	473	105	2	5	12	19	.279	.347	.474	.821