Hugh Duffy has the highest batting average in a season, with an average of .440 in 1894.

Interpreted as:

highest batting average with a minimum of 3.1 PA per team game by a player in MLB season

	NAME	AVG	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Hugh Duffy H. Duffy	.440	1894	BSN	125	539	160	237	51	16	18	145	66	1	15	48		616	374	85	10				.502	.694	1.196	203	91.3	.526	169	80.7
2	Tip O'Neill T. O'Neill	.435	1887	STL	124	517	167	225	52	19	14	123	50	5	20	30		572	357	85					.490	.691	1.180	191	96.4	.525	190	88.9
3	Aaron Judge A. Judge	.430	2025	NYY	32	121	30	52	8	2	10	32	21	2	29	3	2	144	94	20	0	0	4	3	.521	.777	1.298	43	26.2	.544	266	26.7
4	Ross Barnes R. Barnes	.429	1876	CWS	66	322	126	138	21	14	1	59	20		8			342	190	36						.590		105	53.2	.478	197	50.5
5	Nap Lajoie N. Lajoie	.426	1901	PHA	131	544	145	232	48	14	14	125	24	13	9	27		582	350	76	1				.463	.643	1.106	157	81	.506	186	71.5
6	Willie Keeler W. Keeler	.424	1897	BAL	129	564	145	239	27	19	0	74	35	7	5	64		618	304	46	12				.464	.539	1.003	155	61.5	.470	159	57.2
7	Rogers Hornsby R. Hornsby	.424	1924	SLN	143	536	121	227	43	14	25	94	89	2	32	5	12	640	373	82	13				.507	.696	1.203	175	96.7	.537	221	95.9
8	George Sisler G. Sisler	.420	1922	SLA	142	586	134	246	42	18	8	105	49	3	14	51	19	654	348	68	16				.467	.594	1.061	152	70.1	.481	170	61.2
9	Ty Cobb T. Cobb	.420	1911	DET	146	591	147	248	47	24	8	127	44	8	43	83		654	367	79	11				.467	.621	1.088	160	82.2	.506	189	74
10	Sam Thompson S. Thompson	.415	1894	PHI	102	451	114	187	32	28	13	147	41	1	13	27		501	314	73	8				.465	.696	1.161	153	62.8	.504	162	58.7
11	Fred Dunlap F. Dunlap	.412	1884	SLU	101	449	160	185	39	8	13		29					478	279	60						.621		143	73.6	.477	215	77.7
12	Ed Delahanty E. Delahanty	.410	1899	PHI	146	581	135	238	55	9	9	137	55	4	22	30		645	338	73	5				.464	.582	1.046	164	74.8	.488	177	72.6
13	Jesse Burkett J. Burkett	.410	1896	CLE	133	586	160	240	27	16	6	72	49	7	19	34		647	317	49	5				.461	.541	1.002	163	63.9	.468	154	56.2
14	Ty Cobb T. Cobb	.409	1912	DET	140	553	120	226	30	23	7	83	43	5	30	61	34	609	323	60	8				.456	.584	1.040	140	67.5	.485	188	65
15	Joe Jackson J. Jackson	.408	1911	CLE	147	571	126	233	45	19	7	83	56	8	43	41		641	337	71	6				.468	.590	1.058	151	75.1	.494	184	68.6
16	George Sisler G. Sisler	.407	1920	SLA	154	631	137	257	49	18	19	122	46	2	19	42	17	692	399	86	13				.449	.632	1.082	161	82.5	.494	176	68.6
17	Ted Williams T. Williams	.406	1941	BSA	143	456	135	185	33	3	37	120	147	3	27	2	4	606	335	73	0			10	.553	.735	1.287	179	108.8	.568	221	96.9
18	Jesse Burkett J. Burkett	.405	1895	CLE	132	555	153	225	22	13	5	83	74	8	32	41		644	288	40	7				.482	.519	1.001	172	65.6	.473	152	57.2
19	Ed Delahanty E. Delahanty	.404	1895	PHI	116	480	149	194	49	10	11	106	86	6	31	46		578	296	70	6				.500	.617	1.117	174	78.7	.510	177	76.8
20	Ed Delahanty E. Delahanty	.404	1894	PHI	116	495	148	200	39	19	4	133	60	7	16	21		567	289	62	5				.475	.584	1.059	161	58.3	.481	150	53.8
21	Billy Hamilton B. Hamilton	.403	1894	PHI	132	558	198	225	25	15	4	90	128	9	19	100		702	292	44	7				.521	.523	1.044	209	81.9	.495	157	76.2
22	Rogers Hornsby R. Hornsby	.403	1925	SLN	138	504	133	203	41	10	39	143	83	2	39	5	3	605	381	90	16				.489	.756	1.245	173	94.1	.540	208	90.1
23	Harry Heilmann H. Heilmann	.403	1923	DET	144	524	121	211	44	11	18	115	74	5	40	9	7	626	331	73	23				.481	.632	1.113	155	78	.503	189	73.3
24	Pete Browning P. Browning	.402	1887	LOU	134	547	137	220	35	16	4	118	55	8	39	103		610	299	55					.464	.547	1.011	172	71.3	.465	161	64.3
25	Rogers Hornsby R. Hornsby	.401	1922	SLN	154	623	141	250	46	14	42	152	65	1	50	17	12	704	450	102	15				.459	.722	1.181	186	97.8	.520	197	92.7