Since 1940, Barry Bonds has the best slugging percentage in a season, with a slugging percentage of .863 in 2001.

Interpreted as:

highest single season slg with a minimum of 3.1 PA per team game by a player since 1940

	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	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
3	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
4	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
5	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
6	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
7	Aaron Judge A. Judge	.739	2025	NYY	95	349	85	125	24	2	35	81	69	4	107	6	3	426	258	61	0	4	24	10	.358	.465	1.204	109	59.7	.488	220	59.6
8	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
9	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
10	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
11	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
12	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
13	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
14	Albert Belle A. Belle	.714	1994	CLE	106	412	90	147	35	2	36	101	58	5	71	9	6	480	294	73	1	4	9	5	.357	.438	1.152	119	58.1	.476	186	54.7
15	Larry Walker L. Walker	.710	1999	COL	127	438	108	166	26	4	37	115	57	12	52	11	4	513	311	67	0	6	8	12	.379	.458	1.168	131	64.1	.485	167	46.6
16	Mickey Mantle M. Mantle	.705	1956	NYY	150	533	132	188	22	5	52	130	112	2	99	10	1	652	376	79	1	4	6	4	.353	.464	1.169	164	88.9	.498	202	84.6
17	Stan Musial S. Musial	.702	1948	SLN	155	611	135	230	46	18	39	131	79	3	34	7		694	429	103	1			18	.376	.450	1.152	174	92.3	.512	201	86.4
18	Aaron Judge A. Judge	.701	2024	NYY	158	559	122	180	36	1	58	144	133	9	171	10	0	703	392	95	0	2	20	22	.322	.458	1.159	176	93.7	.476	219	95.5
19	Todd Helton T. Helton	.698	2000	COL	160	580	138	216	59	2	42	147	103	4	61	5	3	697	405	103	0	10	22	12	.372	.463	1.162	174	82.4	.476	161	58
20	Manny Ramirez M. Ramirez	.697	2000	CLE	118	439	92	154	34	2	38	122	86	3	117	1	1	532	306	74	0	4	9	9	.351	.457	1.154	133	63	.477	181	58.6
21	Mark McGwire M. McGwire	.697	1999	STL	153	521	118	145	21	1	65	147	133	2	141	0	0	661	363	87	0	5	21	12	.278	.424	1.120	150	64.2	.453	169	61.5
22	Juan Soto J. Soto	.695	2020	WSH	47	154	39	54	14	0	13	37	41	1	28	6	2	196	107	27	0	0	12	1	.351	.490	1.185	51	26.1	.478	201	25.4
23	Albert Belle A. Belle	.690	1995	CLE	143	546	121	173	52	1	50	126	73	6	80	5	2	629	377	103	0	4	5	24	.317	.401	1.091	143	64.3	.456	173	59.9
24	Luis Gonzalez L. Gonzalez	.688	2001	ARI	162	609	128	198	36	7	57	142	100	14	83	1	1	728	419	100	0	5	24	14	.325	.429	1.117	168	77.8	.454	173	69.4
25	Barry Bonds B. Bonds	.688	2000	SFG	143	480	129	147	28	4	49	106	117	3	77	11	3	607	330	81	0	7	22	6	.306	.440	1.127	141	61	.456	174	61.2