who has the highest batting average in september with at least 400 at bats

Lefty O'Doul has the best career batting average with 400+ at-bats in the month of September, with an average of .376.

	NAME	AVG	AB	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Lefty O'Doul L. O'Doul	.376	436	148	93	164	28	7	15	74	43	1	20	8		487	251	50	7				.433	.576	1.009
2	Harry Heilmann H. Heilmann	.370	1,189	331	185	440	74	22	22		112	5	65	18		1,352	624	118	46				.426	.525	.951
3	Rogers Hornsby R. Hornsby	.368	1,303	361	266	480	94	25	44		157	3	97	18		1,503	756	163	40				.437	.580	1.018
4	Ty Cobb T. Cobb	.362	2,060	557	416	745	103	47	14		233	12		207		2,363	984	164	63					.478
5	Ted Williams T. Williams	.359	1,283	396	278	460	86	11	88	289	329	7	121	3	3	1,622	832	185	2	1	11	40	.491	.648	1.140
6	Eddie Collins E. Collins	.354	1,442	433	290	510	62	24	8		249	11		157		1,782	644	94	80				.452	.447	.899
7	Joe Jackson J. Jackson	.352	878	238	165	309	44	27	12		99	13		37		1,016	443	83	26				.425	.505	.930
8	Mike Donlin M. Donlin	.349	796	215	143	278	36	23	4		78	3		36		893	372	63	16				.409	.467	.877
9	Lloyd Waner L. Waner	.348	1,255	324	185	437	45	21	5	110	57	4	23	17		1,336	539	71	20			0	.378	.429	.808
10	Taffy Wright T. Wright	.346	613	165	83	212	37	10	6	82	64	5	32	9		686	287	53	4			13	.412	.468	.880
11	Gene Richards G. Richards	.345	592	170	73	204	23	13	5	50	41	3	67	42	22	638	268	41	1	1	5	10	.389	.453	.842
12	Ross Youngs R. Youngs	.344	619	163	102	213	26	10	3	79	65	5	48	9		701	268	39	12				.411	.433	.844
13	Stan Musial S. Musial	.344	1,824	505	319	627	130	29	77	329	226	11	132	14	5	2,073	1,046	236	4	8	7	42	.418	.573	.991
14	Irish Meusel I. Meusel	.343	676	174	99	232	38	14	15	132	30	1	27	9		726	343	67	19				.372	.507	.879
15	Sam Rice S. Rice	.341	1,603	416	271	546	92	39	1		122	12	39	66		1,782	719	132	45				.391	.449	.840
16	Dale Alexander D. Alexander	.339	407	110	70	138	25	6	13	73	44	2	24	4		457	214	44	4				.406	.526	.932
17	Ginger Beaumont G. Beaumont	.338	704	190	126	238	23	8	4		52	2		23		775	289	35	19					.411
18	Nap Lajoie N. Lajoie	.338	1,409	381	235	476	98	20	11		101	24		57		1,564	647	129	30				.392	.459	.851
19	Wade Boggs W. Boggs	.338	1,430	375	260	483	91	8	12	165	232	5	112	3	9	1,684	626	111	3	14	27	31	.428	.438	.866
20	Bill Terry B. Terry	.337	1,273	328	207	429	76	19	27	208	97	0	94	5		1,394	624	122	24				.384	.490	.874
21	Paul Waner P. Waner	.337	1,654	448	259	557	96	34	23	224	181	8	83	12		1,872	790	153	29			7	.405	.478	.882
22	Bob Fothergill B. Fothergill	.336	535	192	73	180	31	10	3	91	29	3	34	6		580	240	44	13				.374	.449	.822
23	Al Simmons A. Simmons	.336	1,323	335	210	445	78	27	35	248	78	2	104	13		1,410	682	140	7			0	.374	.515	.890
24	Babe Ruth B. Ruth	.336	1,400	414	340	470	88	24	115	349	301	5	222	18		1,730	951	227	24				.455	.679	1.134
25	Hack Wilson H. Wilson	.335	623	181	116	209	36	11	31	144	87	3	85	8		725	360	78	12				.419	.578	.997