Ted Williams had the best slugging percentage by a player in his first 5 seasons, with a slugging percentage of .647.

Interpreted as:

highest slg with a minimum of 1.55 PA per team game by a player in first 5 seasons

	NAME	SLG	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	Ted Williams T. Williams	.647	736	2,618	683	925	191	41	165	638	651	14	240	11		3,287	1,693	397	4			57	.353	.484	1.131	809	433.3	.507	191	377.2
2	Chuck Klein C. Klein	.639	671	2,761	598	986	202	43	163	607	241	7	231	36		3,040	1,763	408	31				.357	.410	1.049	681	285.8	.458	151	216.2
3	Lou Gehrig L. Gehrig	.625	459	1,631	365	543	127	49	84	363	263	6	214	22		1,952	1,020	260	52				.333	.427	1.053	431	188.9	.469	166	174.1
4	Joe DiMaggio J. DiMaggio	.623	686	2,827	613	970	171	58	168	691	260	18	147	17		3,116	1,761	397	11			27	.343	.402	1.025	668	276.4	.452	152	233.3
5	Todd Helton T. Helton	.622	665	2,368	475	791	191	11	156	514	330	21	307	22	18	2,745	1,472	358	2	24	48	56	.334	.416	1.038	583	233.2	.434	139	142.1
6	Albert Pujols A. Pujols	.621	790	2,954	629	982	227	11	201	621	401	44	344	29	15	3,428	1,834	439	1	28	70	94	.332	.416	1.037	720	301.4	.432	166	290.6
7	Johnny Mize J. Mize	.611	728	2,648	479	898	179	58	142	553	354	19	234	10		3,035	1,619	379	14			19	.339	.421	1.032	663	283.4	.458	173	273.5
8	Vladimir Guerrero V. Guerrero	.592	572	2,156	357	695	124	25	136	404	174	29	273	37	30	2,373	1,277	285	0	14	52	60	.322	.378	.971	443	140.5	.405	141	130.7
9	Frank Thomas F. Thomas	.590	644	2,271	463	741	158	8	142	484	525	12	369	13	11	2,844	1,341	308	0	36	54	69	.326	.449	1.040	610	281.2	.447	181	277.8
10	Ryan Howard R. Howard	.590	572	2,071	360	578	99	7	177	499	331	19	692	2	2	2,442	1,222	283	0	21	97	39	.279	.380	.970	440	140	.397	138	120.5
11	Yordan Alvarez Y. Alvarez	.588	482	1,738	324	513	114	4	129	380	249	30	438	2	1	2,033	1,022	247	0	16	21	45	.295	.390	.978	400	155.7	.408	166	159.1
12	Rudy York R. York	.588	499	1,761	329	541	107	12	121	429	264	8	267	12		2,042	1,035	240	9			20	.307	.400	.988	413	161.2	.438	139	112.8
13	Willie Mays W. Mays	.584	610	2,314	419	708	102	43	152	412	286	10	259	83	24	2,628	1,352	297	1	17	33	53	.306	.382	.966	491	187.8	.421	151	166.2
14	Travis Hafner T. Hafner	.583	520	1,775	331	527	137	8	118	380	277	43	441	5	4	2,108	1,034	263	0	13	33	37	.297	.402	.984	409	150.2	.413	156	148.2
15	Jimmie Foxx J. Foxx	.579	364	1,088	241	372	61	25	49	222	178	4	131	15		1,301	630	135	31				.342	.436	1.015	279	113.6	.454	160	104.1
16	Hank Greenberg H. Greenberg	.576	435	1,708	307	555	148	28	75	407	205	3	268	20		1,931	984	251	15				.325	.398	.974	387	149.1	.435	145	121.6
17	Nomar Garciaparra N. Garciaparra	.573	595	2,436	451	812	176	29	117	436	184	24	257	58	20	2,673	1,397	322	3	26	30	48	.333	.382	.956	496	157.2	.405	139	139.1
18	Ralph Kiner R. Kiner	.573	754	2,718	513	767	99	23	215	576	523	10	391	13		3,254	1,557	337	3			74	.282	.400	.973	631	252.8	.439	153	214.5
19	Joe Jackson J. Jackson	.571	331	1,258	265	494	91	50	11	190	119	20	76	80		1,421	718	152	24				.393	.453	1.024	320	152.8	.479	182	143.3
20	Babe Herman B. Herman	.567	700	2,577	441	893	188	50	93	488	242	8	231	52		2,898	1,460	331	71				.347	.404	.971	577	204	.433	144	181.8
21	Hal Trosky Sr. H. Trosky Sr.	.563	623	2,531	435	785	160	36	136	553	207	8	239	12		2,753	1,425	332	7				.310	.364	.927	501	152.3	.411	126	103.8
22	Ryan Braun R. Braun	.563	729	2,879	506	898	187	26	161	531	242	37	560	96	24	3,176	1,620	374	0	18	9	58	.312	.371	.933	568	193.3	.400	147	180.7
23	Lance Berkman L. Berkman	.562	615	2,139	412	642	155	14	126	429	374	27	441	31	19	2,561	1,203	295	1	20	39	36	.300	.407	.970	490	172.3	.410	145	148.3
24	Kiki Cuyler K. Cuyler	.562	283	1,126	242	395	71	43	27	189	93	21	122	75		1,264	633	141	24				.351	.410	.973	251	90	.438	149	81.3
25	Mike Piazza M. Piazza	.559	537	2,002	319	653	78	2	128	409	203	7	336	5	10	2,223	1,119	208	0	11	47	53	.326	.388	.947	410	134.1	.403	153	149.8