Between the 1940 and 1949 seasons, Ted Williams had the highest slugging percentage, with a slugging percentage of .647.

Interpreted as:

best slugging with a minimum of 1.55 PA per team game by a player in the 40s

	NAME	SLG	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	Ted Williams T. Williams	.647	1,035	3,656	951	1,303	270	45	234	893	994	19	312	14		4,671	2,365	549	2	89	.356	.496	1.143	1167	635.1	.514	197	561.3
2	Hank Greenberg H. Greenberg	.583	512	1,835	348	542	117	18	125	423	335	5	288	15		2,179	1,070	260	4	58	.295	.406	.989	436	190.3	.447	157	154.9
3	Stan Musial S. Musial	.578	1,072	4,133	815	1,432	302	108	146	706	565	21	199	44		4,747	2,388	556	28	82	.346	.428	1.005	976	451.5	.460	174	410.1
4	Ralph Kiner R. Kiner	.568	604	2,171	401	618	78	17	168	458	401	7	312	11		2,582	1,234	263	3	52	.285	.398	.966	495	200.8	.438	153	169.6
5	Joe DiMaggio J. DiMaggio	.568	927	3,562	684	1,156	191	68	180	786	450	24	183	14		4,039	2,023	439	3	89	.325	.404	.972	792	333	.442	159	299.6
6	Johnny Mize J. Mize	.561	949	3,527	655	1,071	181	37	217	744	496	28	259	24		4,057	1,977	435	6	49	.304	.394	.954	770	306	.434	157	276.1
7	Charlie Keller C. Keller	.521	953	3,278	625	920	142	63	173	640	679	10	431	39		3,975	1,707	378	8	46	.281	.406	.926	727	287	.428	154	254.1
8	Jeff Heath J. Heath	.499	1,104	3,902	595	1,121	213	70	158	690	516	10	538	44		4,445	1,948	441	17	52	.287	.372	.871	729	235.4	.402	140	211.6
9	Hank Sauer H. Sauer	.497	330	1,208	185	327	50	2	73	225	124	7	173	4		1,344	600	125	5	24	.271	.342	.839	203	45.2	.384	123	38.7
10	Tommy Henrich T. Henrich	.492	914	3,428	669	967	207	49	138	571	507	31	305	20		4,008	1,686	394	42	51	.282	.379	.871	662	206.8	.402	135	175.2
11	Del Ennis D. Ennis	.488	586	2,280	319	673	134	27	84	359	182	13	235	18		2,479	1,113	245	4	45	.295	.351	.839	372	89.6	.385	126	77.5
12	Joe Cronin J. Cronin	.486	475	1,421	242	414	87	14	54	288	228	3	166	9		1,685	691	155	33	39	.291	.390	.877	287	92.6	.404	130	63.7
13	Enos Slaughter E. Slaughter	.484	1,005	3,809	650	1,190	200	84	95	649	479	18	227	41		4,335	1,843	379	29	50	.312	.392	.876	724	231.8	.405	139	198
14	Bobby Thomson B. Thomson	.483	450	1,711	287	486	85	17	74	266	118	8	205	13		1,844	827	176	7	42	.284	.333	.816	262	46.9	.373	113	30.9
15	Yogi Berra Y. Berra	.483	331	1,199	173	348	60	15	47	247	61	7	62	5		1,269	579	122	2	22	.290	.328	.811	177	28.8	.370	113	21.1
16	Jimmie Foxx J. Foxx	.481	483	1,551	266	429	81	13	70	297	259	2	304	7		1,817	746	164	5	52	.277	.381	.862	302	93.7	.397	126	65.1
17	Phil Weintraub P. Weintraub	.477	186	644	100	191	27	10	23	119	113	0	88	2		764	307	60	7	15	.297	.402	.878	130	47.7	.413	143	38.4
18	Mel Ott M. Ott	.477	866	2,912	527	815	129	9	142	474	573	26	330	27		3,535	1,388	280	24	33	.280	.403	.879	610	218.9	.413	148	194.8
19	Dolph Camilli D. Camilli	.473	599	2,116	353	559	101	34	91	387	390	12	369	26		2,526	1,001	226	8	33	.264	.382	.855	412	130.3	.397	141	119.4
20	Roy Sievers R. Sievers	.471	140	471	84	144	28	1	16	91	70	2	75	1	5	545	222	45	2	15	.306	.398	.869	91	25.9	.404	123	16
21	Wally Westlake W. Westlake	.470	391	1,360	214	381	51	18	57	238	118	14	172	13		1,499	639	126	7	41	.280	.344	.814	214	38.8	.374	111	20.1
22	Jackie Robinson J. Robinson	.470	454	1,757	355	548	107	25	40	257	217	24	100	88		2,051	825	172	53	34	.312	.395	.864	337	97.4	.401	130	76.1
23	Larry Doby L. Doby	.469	297	1,018	192	290	49	12	38	153	146	12	178	19		1,183	477	99	7	24	.285	.381	.850	188	47.9	.394	128	42.8
24	Bobby Doerr B. Doerr	.468	1,283	4,924	764	1,407	272	66	164	887	570	7	437	41		5,568	2,303	502	67	139	.286	.361	.828	839	216.3	.384	121	138.8
25	Bob Johnson B. Johnson	.467	840	3,106	511	883	179	42	102	533	482	16	373	35		3,611	1,452	323	7	90	.284	.383	.851	583	183.9	.397	134	144.2