Ty Cobb has the highest BABIP in a season, with an average of .444 in 1911.

Interpreted as:

highest single season babip with a minimum of 3.1 PA per team game by a player

	NAME	BABIP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Ty Cobb T. Cobb	.444	1911	DET	146	591	147	248	47	24	8	127	44	8	43	83		654	367	79	11	.420	.467	.621	1.088	160	82.2	.506	189	74
2	Ross Barnes R. Barnes	.438	1876	CWS	66	322	126	138	21	14	1	59	20		8			342	190	36		.429		.590		105	53.2	.478	197	50.5
3	Tip O'Neill T. O'Neill	.437	1887	STL	124	517	167	225	52	19	14	123	50	5	20	30		572	357	85		.435	.490	.691	1.180	191	96.4	.525	190	88.9
4	Joe Jackson J. Jackson	.434	1911	CLE	147	571	126	233	45	19	7	83	56	8	43	41		641	337	71	6	.408	.468	.590	1.058	151	75.1	.494	184	68.6
5	Hugh Duffy H. Duffy	.433	1894	BSN	125	539	160	237	51	16	18	145	66	1	15	48		616	374	85	10	.440	.502	.694	1.196	203	91.3	.526	169	80.7
6	Pete Browning P. Browning	.429	1887	LOU	134	547	137	220	35	16	4	118	55	8	39	103		610	299	55		.402	.464	.547	1.011	172	71.3	.465	161	64.3
7	Willie Keeler W. Keeler	.428	1897	BAL	129	564	145	239	27	19	0	74	35	7	5	64		618	304	46	12	.424	.464	.539	1.003	155	61.5	.470	159	57.2
8	Jesse Burkett J. Burkett	.425	1895	CLE	132	555	153	225	22	13	5	83	74	8	32	41		644	288	40	7	.405	.482	.519	1.001	172	65.6	.473	152	57.2
9	Ty Cobb T. Cobb	.424	1912	DET	140	553	120	226	30	23	7	83	43	5	30	61	34	609	323	60	8	.409	.456	.584	1.040	140	67.5	.485	188	65
10	Babe Ruth B. Ruth	.423	1923	NYY	152	522	151	205	45	13	41	130	170	4	93	17	21	699	399	99	3	.393	.545	.764	1.309	211	124.7	.571	230	120.4
11	George Sisler G. Sisler	.422	1922	SLA	142	586	134	246	42	18	8	105	49	3	14	51	19	654	348	68	16	.420	.467	.594	1.061	152	70.1	.481	170	61.2
12	Rogers Hornsby R. Hornsby	.422	1924	SLN	143	536	121	227	43	14	25	94	89	2	32	5	12	640	373	82	13	.424	.507	.696	1.203	175	96.7	.537	221	95.9
13	Nap Lajoie N. Lajoie	.418	1901	PHA	131	544	145	232	48	14	14	125	24	13	9	27		582	350	76	1	.426	.463	.643	1.106	157	81	.506	186	71.5
14	Ed Delahanty E. Delahanty	.418	1895	PHI	116	480	149	194	49	10	11	106	86	6	31	46		578	296	70	6	.404	.500	.617	1.117	174	78.7	.510	177	76.8
15	Jesse Burkett J. Burkett	.417	1896	CLE	133	586	160	240	27	16	6	72	49	7	19	34		647	317	49	5	.410	.461	.541	1.002	163	63.9	.468	154	56.2
16	Ed Delahanty E. Delahanty	.416	1899	PHI	146	581	135	238	55	9	9	137	55	4	22	30		645	338	73	5	.410	.464	.582	1.046	164	74.8	.488	177	72.6
17	Ty Cobb T. Cobb	.416	1922	DET	137	526	99	211	42	16	4	99	55	4	24	9	13	612	297	62	27	.401	.462	.565	1.026	136	58.8	.467	167	54.3
18	George Stone G. Stone	.416	1906	SLA	154	581	91	208	25	20	6	71	52	7	89	35		658	291	51	18	.358	.417	.501	.918	123	58	.441	183	56.5
19	Joe Kelley J. Kelley	.415	1894	BAL	129	507	165	199	48	20	6	111	107	5	36	46		638	305	74	19	.393	.502	.602	1.104	194	78.6	.502	159	71.1
20	Ty Cobb T. Cobb	.415	1913	DET	122	428	70	167	18	16	4	67	58	4	31	51		501	229	38	11	.390	.467	.535	1.002	107	52.2	.473	186	48.7
21	Jesse Burkett J. Burkett	.415	1901	STL	142	601	142	226	20	15	10	75	59	10	70	27		673	306	45	3	.376	.440	.509	.949	149	61.2	.444	168	60.9
22	Harry Heilmann H. Heilmann	.414	1923	DET	144	524	121	211	44	11	18	115	74	5	40	9	7	626	331	73	23	.403	.481	.632	1.113	155	78	.503	189	73.3
23	Billy Hamilton B. Hamilton	.413	1894	PHI	132	558	198	225	25	15	4	90	128	9	19	100		702	292	44	7	.403	.521	.523	1.044	209	81.9	.495	157	76.2
24	King Kelly K. Kelly	.413	1886	CWS	118	451	155	175	32	11	4	79	83		33	53		534	241	47		.388		.534		150	71.7	.475	176	62.2
25	Ed Delahanty E. Delahanty	.413	1894	PHI	116	495	148	200	39	19	4	133	60	7	16	21		567	289	62	5	.404	.475	.584	1.059	161	58.3	.481	150	53.8