Barry Bonds has the most bases on balls in a season, with 232 bases on balls in 2004.

Interpreted as:

most walks by a player season

	NAME	BB	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Barry Bonds B. Bonds	232	2004	SFG	147	373	129	135	27	3	45	101	9	41	6	1	617	303	75	0	3	120	5	.362	.609	.812	1.422	185	108	.537	233	105.7
2	Barry Bonds B. Bonds	198	2002	SFG	143	403	117	149	31	2	46	110	9	47	9	2	612	322	79	0	2	68	4	.370	.582	.799	1.381	183	110	.544	244	109.9
3	Barry Bonds B. Bonds	177	2001	SFG	153	476	129	156	32	2	73	137	9	93	13	3	664	411	107	0	2	35	5	.328	.515	.863	1.379	200	117.7	.537	234	116.6
4	Babe Ruth B. Ruth	170	1923	NYY	152	522	151	205	45	13	41	130	4	93	17	21	699	399	99	3				.393	.545	.764	1.309	211	124.7	.571	230	120.4
5	Mark McGwire M. McGwire	162	1998	STL	155	509	130	152	21	0	70	147	6	155	1	0	681	383	91	0	4	28	8	.299	.470	.752	1.222	176	91.7	.492	205	90.7
6	Ted Williams T. Williams	162	1949	BSA	155	566	150	194	39	3	43	159	2	48	1	1	730	368	85	0			22	.343	.490	.650	1.141	182	95.5	.511	187	82.2
7	Ted Williams T. Williams	162	1947	BSA	156	528	125	181	40	9	32	114	2	47	0	1	693	335	81	1			10	.343	.499	.634	1.133	170	91.3	.508	207	86.2
8	Ted Williams T. Williams	156	1946	BSA	150	514	142	176	37	8	38	123	2	44	0	0	672	343	83	0			12	.342	.497	.667	1.164	166	95.8	.525	214	87.5
9	Barry Bonds B. Bonds	151	1996	SFG	158	517	122	159	27	3	42	129	1	76	40	7	675	318	72	0	6	30	11	.308	.461	.615	1.076	151	63.7	.446	179	67.8
10	Eddie Yost E. Yost	151	1956	WSH	152	515	94	119	17	2	11	53	8	82	8	5	684	173	30	9	1	9	8	.231	.412	.336	.748	95	15.5	.354	109	7.8
11	Babe Ruth B. Ruth	150	1920	NYY	142	458	158	172	36	9	54	135	3	80	14	14	616	388	99	5				.376	.532	.847	1.379	191	120.9	.597	237	110.5
12	Jeff Bagwell J. Bagwell	149	1999	HOU	162	562	143	171	35	0	42	126	11	127	30	11	729	332	77	0	7	16	18	.304	.454	.591	1.045	159	63.9	.442	166	65.7
13	Eddie Joost E. Joost	149	1949	PHA	144	525	128	138	25	3	23	81	4	80	2	1	682	238	51	4			6	.263	.429	.453	.883	120	39.3	.417	136	31.7
14	Barry Bonds B. Bonds	148	2003	SFG	130	390	111	133	22	1	45	90	10	58	7	0	550	292	68	0	2	61	7	.341	.529	.749	1.278	148	80.5	.503	212	79.4
15	Jimmy Wynn J. Wynn	148	1969	HOU	149	495	113	133	17	1	33	87	3	142	23	7	653	251	51	2	5	14	5	.269	.436	.507	.943	122	52.2	.421	166	49.5
16	Eddie Stanky E. Stanky	148	1945	BKN	153	555	128	143	29	5	1	39	4	42	6		726	185	35	19			7	.258	.417	.333	.751	103	24.4	.375	117	15.2
17	Ted Williams T. Williams	147	1941	BSA	143	456	135	185	33	3	37	120	3	27	2	4	606	335	73	0			10	.406	.553	.735	1.287	179	108.8	.568	221	96.9
18	Jimmy Sheckard J. Sheckard	147	1911	CHC	156	539	121	149	26	11	4	50	3	58	32		704	209	41	15				.276	.434	.388	.822	120	36.6	.406	137	33
19	Mickey Mantle M. Mantle	146	1957	NYY	144	474	121	173	28	6	34	94	0	75	16	3	623	315	68	0	3	23	5	.365	.512	.665	1.177	157	87.1	.498	217	86
20	Juan Soto J. Soto	145	2021	WSH	151	502	111	157	20	2	29	95	2	93	9	7	654	268	51	0	5	23	23	.313	.465	.534	.999	136	57.3	.420	164	53.2
21	Barry Bonds B. Bonds	145	1997	SFG	159	532	123	155	26	5	40	101	8	87	37	8	690	311	71	0	5	34	13	.291	.446	.585	1.031	141	56.1	.430	165	57
22	Harmon Killebrew H. Killebrew	145	1969	MIN	162	555	106	153	20	2	49	140	5	84	8	2	709	324	71	0	4	20	16	.276	.427	.584	1.011	143	67.4	.441	173	59.9
23	Ted Williams T. Williams	145	1942	BSA	150	522	141	186	34	5	36	137	4	51	3	2	671	338	75	0			12	.356	.499	.648	1.147	168	96.2	.524	209	86.5
24	Babe Ruth B. Ruth	145	1921	NYY	152	540	177	204	44	16	59	168	4	81	17	13	693	457	119	4				.378	.512	.846	1.359	214	127.8	.575	224	118.7
25	Ted Williams T. Williams	144	1951	BSA	148	531	109	169	28	4	30	126	0	45	1	1	675	295	62	0			10	.318	.464	.556	1.019	146	66.5	.463	166	55.4