Chuck Klein had the best slugging percentage by a player in his first 3 seasons, with a slugging percentage of .657.

Interpreted as:

highest slg with a minimum of 1.55 PA per team game by a player in first 3 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	Chuck Klein C. Klein	.657	369	1,517	325	560	118	18	94	349	122	5	133	9		1,673	996	230	29				.369	.418	1.074	388	163.7	.466	148	120
2	Ted Williams T. Williams	.640	436	1,582	400	563	120	28	91	378	350	8	145	8		1,944	1,012	239	4			33	.356	.475	1.114	475	241.3	.496	177	203.1
3	Ryan Howard R. Howard	.624	266	932	161	283	47	3	82	217	143	11	294	0	1	1,094	582	132	0	8	45	15	.304	.399	1.024	217	81.6	.417	151	73
4	Albert Pujols A. Pujols	.613	475	1,771	367	591	138	7	114	381	220	28	227	8	8	2,036	1,085	259	1	16	31	54	.334	.412	1.025	424	174.7	.429	164	167.9
5	Joe DiMaggio J. DiMaggio	.610	434	1,857	412	615	111	43	107	432	147	11	97	13		2,020	1,133	261	5				.331	.384	.994	411	153.2	.438	141	122.4
6	Rudy York R. York	.608	242	844	158	254	45	5	68	227	134	2	129	4		981	513	118	1				.301	.398	1.006	203	80.3	.444	140	56.8
7	Johnny Mize J. Mize	.597	420	1,505	264	519	104	31	71	308	180	10	136	3		1,699	898	206	4				.345	.418	1.015	364	148.3	.452	170	148.2
8	Fernando Tatis Jr. F. Tatis Jr.	.596	273	1,036	210	303	55	8	81	195	119	12	324	52	13	1,175	617	144	0	8	8	15	.292	.369	.965	226	80.8	.399	154	82
9	Lance Berkman L. Berkman	.579	304	1,023	196	318	85	6	59	208	160	14	215	18	12	1,211	592	150	0	14	6	16	.311	.406	.985	239	85.5	.416	146	73.6
10	Yordan Alvarez Y. Alvarez	.577	233	858	152	249	61	1	61	186	102	11	240	1	0	976	495	123	0	5	7	26	.290	.371	.948	184	63.6	.393	152	63.7
11	Ryan Braun R. Braun	.574	422	1,697	296	523	104	19	103	317	128	26	362	49	15	1,863	974	226	0	12	6	32	.308	.363	.937	333	107.2	.399	143	100.7
12	Agustín Ramírez A. Ramírez	.569	17	65	7	17	8	0	4	9	4	0	13	1	1	69	37	12	0	0	0	1	.262	.304	.874	11	3.2	.373	136	2.9
13	Gary Sánchez G. Sánchez	.567	177	674	113	191	32	0	53	132	64	12	178	3	1	756	382	85	0	6	3	14	.283	.353	.920	132	40.3	.384	142	38.8
14	Aaron Judge A. Judge	.565	294	1,039	215	284	48	3	83	191	212	10	402	15	8	1,271	587	134	0	10	14	27	.273	.398	.963	242	89.5	.402	156	86.8
15	Alex Rodriguez A. Rodriguez	.562	211	797	160	259	60	3	41	144	68	4	166	22	6	885	448	104	8	8	1	15	.325	.377	.940	164	50.6	.402	134	42.7
16	Willie Mays W. Mays	.561	306	1,156	195	352	57	22	65	201	139	5	134	19	10	1,308	648	144	1	7		25	.304	.379	.940	237	86.9	.419	144	73.6
17	Eddie Mathews E. Mathews	.560	440	1,583	286	441	75	17	112	296	271	5	259	17	10	1,875	886	204	9	7		24	.279	.384	.944	344	129.6	.420	151	123
18	Cody Bellinger C. Bellinger	.559	450	1,595	292	443	88	14	111	288	228	7	405	39	9	1,840	892	213	0	10	43	22	.278	.368	.928	321	97.2	.380	140	95.1
19	Juan Soto J. Soto	.557	313	1,110	226	328	71	6	69	217	228	4	259	23	5	1,349	618	146	1	6	25	21	.295	.415	.972	265	99.4	.405	152	90.1
20	Todd Helton T. Helton	.554	346	1,201	205	378	78	7	65	221	129	12	142	10	10	1,352	665	150	1	9	11	30	.315	.384	.938	246	74.2	.400	116	29.3
21	Jason Bay J. Bay	.553	312	1,097	186	324	75	11	62	197	155	17	300	28	8	1,286	607	148	5	12	11	21	.295	.387	.941	232	75.7	.398	143	69.6
22	Giancarlo Stanton G. Stanton	.553	373	1,324	199	358	81	7	93	232	150	16	432	16	9	1,498	732	181	0	8	21	23	.270	.350	.903	249	78.4	.383	141	72
23	Nomar Garciaparra N. Garciaparra	.552	320	1,375	244	425	83	22	69	236	72	14	168	39	15	1,479	759	174	3	15	3	29	.309	.346	.898	245	61.9	.382	126	50.1
24	Earl Averill E. Averill	.551	446	1,758	352	588	112	31	69	358	187	11	139	32		1,986	969	212	30				.334	.402	.953	387	125.3	.425	137	102.2
25	Buck Freeman B. Freeman	.550	189	713	127	230	22	28	28	144	32	22	31	23		773	392	78	6				.323	.370	.920	156	49.9	.423	139	43.1