Barry Bonds has the best slugging percentage in a season, with a slugging percentage of .863 in 2001.

Interpreted as:

best MLB season slugging percentage with a minimum of 3.1 PA per team game by a player

	NAME	SLG	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Barry Bonds B. Bonds	.863	2001	SFG	153	476	129	156	32	2	73	137	177	9	93	13	3	664	411	107	0	2	35	5	.328	.515	1.379	200	117.7	.537	234	116.6
2	Babe Ruth B. Ruth	.847	1920	NYY	142	458	158	172	36	9	54	135	150	3	80	14	14	616	388	99	5				.376	.532	1.379	191	120.9	.597	237	110.5
3	Babe Ruth B. Ruth	.846	1921	NYY	152	540	177	204	44	16	59	168	145	4	81	17	13	693	457	119	4				.378	.512	1.359	214	127.8	.575	224	118.7
4	Barry Bonds B. Bonds	.812	2004	SFG	147	373	129	135	27	3	45	101	232	9	41	6	1	617	303	75	0	3	120	5	.362	.609	1.422	185	108	.537	233	105.7
5	Barry Bonds B. Bonds	.799	2002	SFG	143	403	117	149	31	2	46	110	198	9	47	9	2	612	322	79	0	2	68	4	.370	.582	1.381	183	110	.544	244	109.9
6	Babe Ruth B. Ruth	.772	1927	NYY	151	540	158	192	29	8	60	165	137	0	89	7	6	691	417	97	14				.356	.486	1.258	195	109.9	.545	212	104.8
7	Lou Gehrig L. Gehrig	.765	1927	NYY	155	584	149	218	52	18	47	173	109	3	84	10	8	717	447	117	21				.373	.474	1.240	199	110.9	.540	209	105.6
8	Babe Ruth B. Ruth	.764	1923	NYY	152	522	151	205	45	13	41	130	170	4	93	17	21	699	399	99	3				.393	.545	1.309	211	124.7	.571	230	120.4
9	Rogers Hornsby R. Hornsby	.756	1925	SLN	138	504	133	203	41	10	39	143	83	2	39	5	3	605	381	90	16				.403	.489	1.245	173	94.1	.540	208	90.1
10	Mark McGwire M. McGwire	.752	1998	STL	155	509	130	152	21	0	70	147	162	6	155	1	0	681	383	91	0	4	28	8	.299	.470	1.222	176	91.7	.492	205	90.7
11	Jeff Bagwell J. Bagwell	.750	1994	HOU	110	400	104	147	32	2	39	116	65	4	65	15	4	479	300	73	0	10	14	12	.368	.451	1.201	123	62.6	.488	206	65.2
12	Barry Bonds B. Bonds	.749	2003	SFG	130	390	111	133	22	1	45	90	148	10	58	7	0	550	292	68	0	2	61	7	.341	.529	1.278	148	80.5	.503	212	79.4
13	Jimmie Foxx J. Foxx	.749	1932	PHA	154	585	151	213	33	9	58	169	116	0	96	3	7	701	438	100	0				.364	.469	1.218	193	105.6	.522	198	95.8
14	Babe Ruth B. Ruth	.739	1924	NYY	153	529	143	200	39	7	46	124	142	4	81	9	13	681	391	92	6				.378	.513	1.252	193	109.2	.549	210	102
15	Babe Ruth B. Ruth	.737	1926	NYY	152	495	139	184	30	5	47	153	144	3	76	11	9	652	365	82	10				.372	.516	1.253	184	105.6	.551	216	100.6
16	Sammy Sosa S. Sosa	.737	2001	CHC	160	577	146	189	34	5	64	160	116	6	153	0	2	711	425	103	0	12	37	6	.328	.437	1.174	171	82.7	.465	186	79.8
17	Ted Williams T. Williams	.735	1941	BSA	143	456	135	185	33	3	37	120	147	3	27	2	4	606	335	73	0			10	.406	.553	1.287	179	108.8	.568	221	96.9
18	Babe Ruth B. Ruth	.732	1930	NYY	145	518	150	186	28	9	49	153	136	1	61	10	10	676	379	86	21				.359	.493	1.225	192	97	.517	204	100.6
19	Ted Williams T. Williams	.731	1957	BOS	132	420	96	163	28	1	38	87	119	5	43	0	1	546	307	67	0	2	33	11	.388	.526	1.257	148	87.3	.524	223	79
20	Mark McGwire M. McGwire	.730	1996	OAK	130	423	104	132	21	0	52	113	116	8	112	0	0	548	309	73	0	1	16	14	.312	.467	1.198	142	71.8	.489	190	68.5
21	Frank Thomas F. Thomas	.729	1994	CWS	113	399	106	141	34	1	38	101	109	2	61	2	3	517	291	73	0	7	12	15	.353	.487	1.217	138	72.3	.499	205	71.9
22	Hack Wilson H. Wilson	.723	1930	CHC	155	585	146	208	35	6	56	191	105	1	84	3		709	423	97	18				.356	.454	1.177	189	89	.497	171	78.9
23	Rogers Hornsby R. Hornsby	.722	1922	SLN	154	623	141	250	46	14	42	152	65	1	50	17	12	704	450	102	15				.401	.459	1.181	186	97.8	.520	197	92.7
24	Lou Gehrig L. Gehrig	.721	1930	NYY	154	581	143	220	42	17	41	173	101	3	63	12	14	703	419	100	18				.379	.473	1.194	193	94.5	.507	198	98.3
25	Larry Walker L. Walker	.720	1997	COL	153	568	143	208	46	4	49	130	78	14	90	33	8	664	409	99	0	4	14	15	.366	.452	1.172	168	86.1	.488	177	64.8