most walks in a career including playoffs before the age of 27

Juan Soto has the most career walks by a player younger than 27 in the regular-season and playoffs, with 923 walks.

Interpreted as:

most walks by a player in a career including playoffs before the age of 27

	NAME	BB	G	AB	R	H	2B	3B	HR	RBI	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Juan Soto J. Soto	923	1,139	4,017	806	1,131	207	16	255	727	21	873	97	28	4,992	2,135	478	4	27	84	102	.282	.416	.531	.947
2	Mickey Mantle M. Mantle	821	1,140	4,072	912	1,273	187	52	260	786	7	803	77	27	4,927	2,344	499	11	16	50	39	.313	.427	.576	1.003
3	Eddie Yost E. Yost	742	1,017	3,762	610	978	193	37	55	327	38	406	35	12	4,604	1,410	285	62			75	.260	.387	.375	.762
4	Mel Ott M. Ott	711	1,293	4,560	915	1,447	257	47	244	967	24	363	45		5,354	2,530	548	59				.317	.412	.555	.967
5	Bryce Harper B. Harper	695	1,103	3,955	720	1,087	223	20	224	645	30	1,035	94	34	4,728	2,022	467	9	39	82	76	.275	.384	.511	.895
6	Jimmie Foxx J. Foxx	677	1,127	3,926	868	1,329	227	73	270	972	7	555	42		4,665	2,512	570	55				.339	.437	.640	1.076
7	Mike Trout M. Trout	673	1,037	3,783	775	1,156	221	43	232	630	62	973	186	35	4,561	2,159	496	0	43	81	52	.306	.415	.571	.985
8	Eddie Mathews E. Mathews	659	1,043	3,799	710	1,048	170	34	254	670	9	625	35	16	4,518	2,048	458	24	27	49	51	.276	.382	.539	.921
9	Rickey Henderson R. Henderson	622	940	3,485	735	1,028	159	35	75	344	23	483	577	149	4,167	1,482	269	16	21	22	49	.295	.403	.425	.828
10	Donie Bush D. Bush	604	929	3,367	649	849	101	35	7		21		260		4,153	1,041	143	161				.252	.369	.309	.678
11	Adam Dunn A. Dunn	574	821	2,832	519	695	151	6	198	466	46	927	48	16	3,466	1,452	355	2	12	60	38	.245	.380	.513	.892
12	Harlond Clift H. Clift	571	842	3,090	637	891	176	40	119	502	29	388	40		3,719	1,504	335	29			5	.288	.404	.487	.891
13	Arky Vaughan A. Vaughan	571	997	3,705	660	1,231	201	83	65	570	28	170	54		4,362	1,793	349	58				.332	.425	.484	.909
14	Frank Thomas F. Thomas	565	675	2,375	481	776	164	8	149	508	14	389	14	11	2,990	1,403	321	0	36	64	70	.327	.453	.591	1.044
15	Rusty Staub R. Staub	545	1,151	4,024	484	1,114	205	24	116	543	33	465	23	21	4,678	1,715	345	42	34	97	93	.277	.365	.426	.791
16	Lou Gehrig L. Gehrig	534	834	2,987	685	1,011	226	76	168	723	17	379	36		3,626	1,893	470	88				.338	.441	.634	1.075
17	Elbie Fletcher E. Fletcher	532	922	3,233	481	887	151	41	54	407	27	319	24		3,823	1,282	246	31			33	.274	.381	.397	.778
18	Albert Pujols A. Pujols	526	986	3,678	787	1,220	270	13	263	793	51	421	36	18	4,288	2,305	546	1	32	107	119	.332	.419	.627	1.046
19	Ken Griffey Jr. K. Griffey Jr.	510	1,068	4,029	706	1,220	229	21	244	734	26	642	111	45	4,610	2,223	494	6	39	120	75	.303	.381	.552	.933
20	Charlie Keller C. Keller	503	675	2,439	497	719	104	49	122	494	3	298	41		2,962	1,287	275	17			31	.295	.416	.528	.944
21	Joe Morgan J. Morgan	495	719	2,638	440	701	105	47	46	217	10	311	152	50	3,180	1,038	198	24	13	12	22	.266	.382	.393	.776
22	Ted Williams T. Williams	493	586	2,104	541	749	154	33	127	515	12	196	11		2,613	1,350	314	4			45	.356	.481	.642	1.122
23	Babe Ruth B. Ruth	489	697	2,138	540	724	162	56	163	534	16	358	46		2,674	1,487	381	31				.339	.465	.696	1.161
24	Ron Santo R. Santo	479	1,053	3,921	526	1,108	189	43	167	618	19	590	22	21	4,465	1,884	399	8	38	43	107	.283	.360	.480	.841
25	Prince Fielder P. Fielder	474	874	3,099	497	863	173	9	200	565	72	696	15	9	3,679	1,654	382	0	34	88	66	.278	.383	.534	.917