Babe Ruth has the best career slugging percentage by an outfielder, with a slugging percentage of .699.

Interpreted as:

highest career slg with a minimum of 3000 PA from an outfielder

	NAME	SLG	PA	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Babe Ruth B. Ruth	.699	10,212	2,337	8,038	2,125	2,765	484	129	705	2,164	2,031	43	1,262	123		5,622	1,318	100				.344	.479	1.178	2665	1,414.6	.517	199	1,348.8
2	Ted Williams T. Williams	.634	9,791	2,292	7,706	1,798	2,654	525	71	521	1,839	2,021	39	709	24	4	4,884	1,117	5	20	86	197	.344	.482	1.116	2349	1,219.7	.493	188	1,067
3	Aaron Judge A. Judge	.611	4,477	1,029	3,700	770	1,082	182	7	327	750	716	35	1,240	56	18	2,259	516	0	26	73	105	.292	.409	1.020	934	398.8	.424	176	402.9
4	Barry Bonds B. Bonds	.607	12,606	2,986	9,847	2,227	2,935	601	77	762	1,996	2,558	106	1,539	514	141	5,976	1,440	4	91	688	165	.298	.444	1.051	2663	1,143.3	.435	172	1,142
5	Manny Ramirez M. Ramirez	.587	9,082	2,133	7,645	1,446	2,402	513	18	512	1,700	1,246	101	1,654	38	32	4,487	1,043	2	88	191	231	.314	.413	1.000	1807	681.5	.420	154	623.7
6	Joe DiMaggio J. DiMaggio	.579	7,671	1,736	6,821	1,390	2,214	389	131	361	1,537	790	46	369	30	0	3,948	881	14			130	.325	.398	.977	1517	604.1	.439	152	528.8
7	Mike Trout M. Trout	.579	6,766	1,547	5,616	1,137	1,667	312	55	387	972	992	101	1,520	214	38	3,250	754	0	57	122	69	.297	.408	.987	1327	541.2	.413	168	543.8
8	Albert Belle A. Belle	.575	5,998	1,377	5,245	892	1,570	366	20	346	1,124	630	51	827	80	39	3,014	732	2	70	86	174	.299	.375	.950	1095	350.1	.402	141	325.5
9	Vladimir Guerrero V. Guerrero	.575	7,419	1,750	6,617	1,126	2,136	404	43	392	1,268	666	83	813	173	86	3,802	839	0	53	239	219	.323	.389	.963	1357	436	.401	142	403.4
10	Mickey Mantle M. Mantle	.574	8,809	2,113	7,227	1,556	2,204	313	71	496	1,400	1,520	11	1,500	146	35	4,147	880	13	38	112	95	.305	.425	.998	1780	784.8	.436	173	768.9
11	Stan Musial S. Musial	.566	7,818	1,881	6,735	1,240	2,242	455	119	292	1,219	1,006	29	442	54	24	3,811	866	21	27	37	132	.333	.420	.986	1559	676	.443	162	591.7
12	Larry Walker L. Walker	.565	8,030	1,988	6,907	1,355	2,160	471	62	383	1,311	913	138	1,231	230	76	3,904	916	7	65	117	153	.313	.400	.965	1532	556.6	.412	140	406.2
13	Hank Aaron H. Aaron	.564	11,972	2,808	10,684	1,937	3,319	568	93	652	2,007	1,134	28	1,181	235	70	6,029	1,313	20	106	253	279	.311	.375	.939	2144	832	.406	155	773.3
14	Lance Berkman L. Berkman	.561	3,835	920	3,171	606	961	218	19	187	629	593	40	635	42	32	1,778	424	1	30	70	53	.303	.416	.976	742	273	.413	150	244.8
15	Willie Mays W. Mays	.557	12,493	2,992	10,881	2,062	3,283	523	140	660	1,903	1,464	44	1,526	338	103	6,066	1,323	13	91	192	251	.302	.384	.941	2266	894.8	.409	154	802.7
16	Juan Gonzalez J. Gonzalez	.556	6,202	1,466	5,671	917	1,674	344	20	365	1,191	407	59	1,100	26	19	3,153	729	2	63	64	157	.295	.345	.901	1030	273.1	.382	129	232.4
17	Giancarlo Stanton G. Stanton	.553	4,191	1,004	3,636	584	977	205	10	270	685	499	36	1,164	36	14	2,012	485	0	20	74	74	.269	.361	.914	710	232	.385	145	223.2
18	Kevin Mitchell K. Mitchell	.552	3,396	866	2,965	481	875	171	15	187	577	377	19	506	15	19	1,637	373	1	34	74	64	.295	.374	.926	598	207.6	.398	152	206.6
19	Gary Sheffield G. Sheffield	.548	7,453	1,749	6,144	1,185	1,848	316	15	391	1,238	1,141	96	817	157	64	3,367	722	0	72	112	153	.301	.414	.962	1422	492.8	.410	152	496.5
20	Ralph Kiner R. Kiner	.548	6,256	1,472	5,205	971	1,451	216	39	369	1,015	1,011	24	749	22	2	2,852	624	9	7	1	126	.279	.398	.946	1167	442.7	.427	147	364.2
21	Ken Griffey Jr. K. Griffey Jr.	.547	10,742	2,521	9,316	1,612	2,680	503	38	611	1,772	1,240	80	1,682	184	69	5,092	1,152	8	98	244	190	.288	.373	.919	1836	532	.389	134	464
22	Hack Wilson H. Wilson	.545	5,556	1,348	4,760	884	1,461	266	67	244	1,063	674	20	713	52		2,593	577	102				.307	.395	.940	1050	349.3	.421	143	321.6
23	Chuck Klein C. Klein	.544	7,154	1,739	6,472	1,168	2,075	398	74	300	1,201	601	12	519	79		3,521	772	69			14	.321	.379	.923	1312	407	.412	133	315.9
24	Frank Robinson F. Robinson	.541	9,118	2,147	7,806	1,447	2,335	403	59	455	1,405	1,062	161	1,157	167	60	4,221	917	14	75	174	207	.299	.391	.932	1632	648.2	.405	154	567.2
25	Duke Snider D. Snider	.540	8,237	2,143	7,161	1,259	2,116	358	85	407	1,333	971	21	1,237	99	50	3,865	850	52	32	104	166	.295	.380	.919	1439	489.8	.404	139	398.8