Hank Greenberg had the best slugging percentage in 1940, with a slugging percentage of .670.

Interpreted as:

best slugging with a minimum of 3.1 PA per team game by a player in 1940

	NAME	SLG	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	OBP	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Hank Greenberg H. Greenberg	.670	1940	DET	148	573	129	195	50	8	41	150	93	1	75	6	3	670	384	99	3	15	.340	.433	1.103	160	78.8	.482	168	62.8
2	Johnny Mize J. Mize	.636	1940	SLN	155	579	111	182	31	13	43	137	82	5	49	7		666	368	87	0	10	.314	.404	1.039	144	64.2	.455	174	59.7
3	Joe DiMaggio J. DiMaggio	.626	1940	NYY	132	508	93	179	28	9	31	133	61	3	30	1	2	572	318	68	0	16	.352	.425	1.051	128	59.2	.464	167	52.5
4	Ted Williams T. Williams	.594	1940	BSA	144	561	134	193	43	14	23	113	96	3	54	4	4	661	333	80	1	13	.344	.442	1.036	146	66.4	.461	159	53.1
5	Rudy York R. York	.583	1940	DET	155	588	105	186	46	6	33	134	89	4	88	3	2	685	343	85	4	12	.316	.410	.993	141	58.1	.441	144	41.8
6	Jimmie Foxx J. Foxx	.581	1940	BSA	144	515	106	153	30	4	36	119	101	0	87	4	7	618	299	70	2	18	.297	.412	.993	127	52.4	.441	147	39.9
7	Bill Nicholson B. Nicholson	.534	1940	CHC	135	491	78	146	27	7	25	98	50	3	67	2		545	262	59	1	7	.297	.366	.899	95	29	.401	144	29.3
8	Dolph Camilli D. Camilli	.529	1940	BKN	142	512	92	147	29	13	23	96	89	4	83	9		606	271	65	1	6	.287	.397	.926	112	38.9	.415	152	37.9
9	Hal Trosky Sr. H. Trosky Sr.	.529	1940	CLE	140	522	85	154	39	4	25	93	79	4	45	1	2	608	276	68	3	5	.295	.392	.920	111	38.1	.413	141	33.9
10	Wally Judnich W. Judnich	.520	1940	SLA	137	519	97	157	27	7	24	89	54	0	71	8	5	577	270	58	4	7	.303	.368	.888	99	29.1	.398	121	16.7
11	Bob Johnson B. Johnson	.514	1940	PHA	138	512	93	137	25	4	31	103	83	4	64	8	2	600	263	60	1	20	.268	.374	.888	103	30.8	.399	124	20.1
12	Joe Gordon J. Gordon	.511	1940	NYY	155	616	112	173	32	10	30	103	52	3	57	18	8	677	315	72	6	12	.281	.340	.851	106	24.3	.379	118	16.3
13	Jim Tabor J. Tabor	.510	1940	BSA	120	459	73	131	28	6	21	81	42	0	58	14	10	505	234	55	4	5	.285	.345	.855	80	19	.382	113	8.8
14	Charlie Keller C. Keller	.508	1940	NYY	138	500	102	143	18	15	21	93	106	0	65	8	2	609	254	54	3	11	.286	.411	.919	113	39.3	.415	138	32.1
15	Enos Slaughter E. Slaughter	.504	1940	SLN	140	516	96	158	25	13	17	73	50	2	35	8		569	260	55	1	4	.306	.370	.874	95	26.2	.392	133	22.4
16	Joe Cronin J. Cronin	.502	1940	BSA	149	548	104	156	35	6	24	111	83	1	65	7	5	645	275	65	13	6	.285	.380	.882	110	32.4	.397	122	19.4
17	Bobby Doerr B. Doerr	.497	1940	BSA	151	595	87	173	37	10	22	105	57	0	53	10	5	658	296	69	6	16	.291	.353	.850	104	24.5	.381	112	11.2
18	Barney McCosky B. McCosky	.491	1940	DET	143	589	123	200	39	19	4	57	67	1	41	13	9	660	289	62	3	8	.340	.408	.899	118	38.4	.407	125	22.6
19	Joe Kuhel J. Kuhel	.488	1940	CWS	155	603	111	169	28	8	27	94	87	3	59	12	5	703	294	63	10	11	.280	.374	.861	116	30.9	.390	121	20.1
20	Frank McCormick F. McCormick	.482	1940	CIN	155	618	93	191	44	3	19	127	52	5	26	2		676	298	66	1	23	.309	.367	.850	108	26.9	.384	134	28.1
21	Joe Medwick J. Medwick	.482	1940	TOT	143	581	83	175	30	12	17	86	32	3	36	2		616	280	59	0	19	.301	.341	.823	91	17	.369	120	15.1
22	Hank Leiber H. Leiber	.482	1940	CHC	117	440	68	133	24	2	17	86	45	3	68	1		491	212	43	3	8	.302	.371	.853	80	20.3	.386	135	20.6
23	Frankie Hayes F. Hayes	.477	1940	PHA	136	465	73	143	23	4	16	70	61	1	59	9	3	529	222	43	2	13	.308	.389	.866	89	25.3	.394	122	15.8
24	Terry Moore T. Moore	.475	1940	SLN	136	537	92	163	33	4	17	64	42	2	44	18		585	255	54	4	6	.304	.356	.831	90	19.1	.375	122	15.3
25	Sam Chapman S. Chapman	.474	1940	PHA	134	508	88	140	26	3	23	75	46	1	96	2	6	562	241	52	7	14	.276	.337	.811	82	13.8	.365	105	3.8