best record in september all-time in a season

The Cincinnati Reds and the Cleveland Indians are tied for the best record in a season in the month of September, with a record of 4-0 in 1918.

	TEAM	REC	SEASON	W%	G	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Reds	4-0	1918	1.000	4	4	0	121	22	32	3	2	0		9	3	5	4		138	39	5	5				.264	.331	.322	.653
2	Indians	1-0	1918	1.000	1	1	0	36	8	11	0	0	0		1	0	1	1		41	11	0	4				.306	.324	.306	.630
3	Cubs	23-3	1935	.885	26	23	3	902	156	271	46	11	10	138	77	8	74	12		1,017	369	67	30				.300	.361	.409	.770
4	Indians	25-4	2017	.862	29	25	4	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
5	Giants	29-5	1916	.853	36	29	5	1,130	154	302	41	17	13	126	80	7	127	54		1,247	416	71	30				.267	.320	.368	.688
6	Cardinals	21-4	1942	.840	25	21	4	866	113	228	45	12	7	102	72	1	76	13		969	318	64	30			13	.263	.321	.367	.688
7	Cardinals	21-4	1930	.840	25	21	4	901	183	298	69	18	16	176	65	5	89	12		999	451	103	28				.331	.379	.501	.880
8	Braves	26-5	1914	.839	34	26	5	1,112	183	309	64	13	5		121	13	133	26		1,304	414	82	58				.278	.356	.372	.728
9	Royals	25-5	1977	.833	30	25	5	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
10	Athletics	17-4	2001	.810	21	17	4	714	132	197	45	3	33	122	93	9	156	9	4	824	347	81	1	7	4	10	.276	.363	.486	.849
11	Cubs	21-5	1938	.808	28	21	5	919	122	232	40	14	13	117	87	4	73	8		1,030	339	67	20				.252	.320	.369	.689
12	Cubs	21-5	1906	.808	26	21	5	866	123	247	30	7	2		60	7		49		971	297	39	38				.285	.337	.343	.680
13	Giants	20-5	1951	.800	25	20	5	847	128	227	34	13	25	120	108	6	93	11	7	976	362	72	15			14	.268	.355	.427	.782
14	Robins	20-5	1920	.800	25	20	5	831	123	255	43	17	9	109	49	5	49	11		920	359	69	35				.307	.349	.432	.781
15	Orioles	23-6	1974	.793	29	23	6	1,019	127	268	40	4	25	117	106	8	139	37	12	1,157	391	69	16	8	13	25	.263	.335	.384	.719
16	Indians	19-5	1952	.792	24	19	5	772	123	213	34	7	22	115	84	4	114	3	4	873	327	63	13			15	.276	.350	.424	.774
17	Yankees	19-5	1952	.792	24	19	5	832	115	218	42	11	24	108	74	8	105	6	4	930	354	77	16			13	.262	.328	.425	.754
18	Red Sox	19-5	1949	.792	24	19	5	791	141	233	43	4	19	132	128	3	86	4		937	341	66	15			32	.295	.395	.431	.826
19	White Sox	22-6	1983	.786	28	22	6	965	162	277	59	6	34	150	116	6	134	36	7	1,104	450	99	8	9	13	24	.287	.364	.466	.830
20	Yankees	22-6	1964	.786	28	22	6	979	140	262	27	7	30	130	87	4	179	7	5	1,088	393	64	14	4	13	21	.268	.329	.401	.730
21	Pirates	25-7	1901	.781	32	25	7	1,137	226	363	59	22	8	197	115	14	76	37		1,289	490	89	23				.319	.389	.431	.820
22	Giants	21-6	2021	.778	27	21	6	937	158	260	61	6	39	149	114	16	226	11	3	1,081	450	106	7	7	11	22	.277	.363	.480	.843
23	Astros	21-6	2018	.778	27	21	6	884	131	219	36	2	32	121	96	13	174	9	3	1,001	355	70	2	6	3	21	.248	.328	.402	.730
24	Indians	21-6	2013	.778	27	21	6	894	140	239	47	6	29	132	100	9	207	21	7	1,028	385	82	11	14	5	19	.267	.342	.431	.773
25	Phillies	21-6	2010	.778	27	21	6	920	142	263	50	3	35	138	102	17	169	28	4	1,050	424	88	8	3	14	26	.286	.367	.461	.827