Barry Bonds has the most bases on balls in a postseason, with 27 walks in 2002.

Interpreted as:

most walks by a player in a single playoffs

	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
1	Barry Bonds B. Bonds	27	2002	SFG	17	45	18	16	2	1	8	16	0	6	0	1	74	44	11	0	2	13	0	.356	.581	.978	1.559
2	Max Muncy M. Muncy	20	2020	LAD	18	60	12	15	4	0	3	14	0	21	0	0	80	28	7	0	0	0	1	.250	.438	.467	.904
3	Gary Sheffield G. Sheffield	20	1997	FLA	16	50	13	16	2	0	3	7	1	8	1	0	71	27	5	0	0	0	2	.320	.521	.540	1.061
4	Chipper Jones C. Jones	18	1999	ATL	14	45	7	11	2	0	1	4	1	11	3	1	65	16	3	0	1	6	1	.244	.462	.356	.817
5	David Ortiz D. Ortiz	16	2013	BOS	16	51	12	18	3	0	5	13	0	7	0	0	68	36	8	0	1	4	1	.353	.500	.706	1.206
6	Manny Ramirez M. Ramirez	16	2007	BOS	14	46	11	16	2	0	4	16	0	9	0	0	63	30	6	0	1	3	3	.348	.508	.652	1.160
7	Max Muncy M. Muncy	15	2024	LAD	16	49	8	8	1	0	3	5	3	20	2	0	67	18	4	0	0	0	1	.163	.388	.367	.755
8	Corey Seager C. Seager	15	2023	TEX	17	66	18	21	6	0	6	12	1	12	0	0	82	45	12	0	0	2	0	.318	.451	.682	1.133
9	Kyle Schwarber K. Schwarber	15	2022	PHI	17	55	13	12	0	0	6	10	2	18	3	0	74	30	6	0	2	3	0	.218	.392	.545	.937
10	Mark Bellhorn M. Bellhorn	15	2004	BOS	14	47	8	9	3	0	3	8	1	17	0	0	63	21	6	0	0	1	2	.191	.397	.447	.844
11	Juan Soto J. Soto	14	2024	NYY	14	49	12	16	3	0	4	9	0	9	0	0	64	31	7	0	1	2	1	.327	.469	.633	1.101
12	Ian Kinsler I. Kinsler	14	2011	TEX	17	65	10	20	5	0	1	11	1	9	3	4	80	28	6	0	0	1	1	.308	.438	.431	.868
13	David Ortiz D. Ortiz	14	2007	BOS	14	46	16	17	6	0	3	10	1	9	0	0	63	32	9	0	2	2	2	.370	.508	.696	1.204
14	Albert Belle A. Belle	14	1995	CLE	14	46	8	11	2	0	4	8	1	13	0	1	61	25	6	0	0	4	0	.239	.426	.543	.970
15	Shohei Ohtani S. Ohtani	13	2025	LAD	13	53	12	15	2	1	8	14	0	19	1	1	66	43	11	0	0	8	0	.283	.424	.811	1.236
16	Shohei Ohtani S. Ohtani	13	2024	LAD	16	61	14	14	1	0	3	10	1	22	0	2	75	24	4	0	0	0	0	.230	.373	.393	.767
17	Bryce Harper B. Harper	13	2023	PHI	13	42	14	12	0	0	5	8	0	11	3	1	55	27	5	0	0	2	2	.286	.455	.643	1.097
18	Christian Walker C. Walker	13	2023	ARI	17	60	7	13	5	0	1	7	1	19	6	0	75	21	6	0	1	1	0	.217	.360	.350	.710
19	Yordan Alvarez Y. Alvarez	13	2021	HOU	16	54	13	17	4	2	2	9	1	17	0	0	69	31	8	0	1	0	1	.315	.449	.574	1.023
20	Willy Adames W. Adames	13	2020	TBR	20	59	3	8	4	0	0	4	1	25	1	1	73	12	4	0	0	0	1	.136	.301	.203	.505
21	Chase Utley C. Utley	13	2008	PHI	14	50	10	11	3	0	3	9	1	14	3	1	64	23	6	0	0	1	1	.220	.391	.460	.851
22	Albert Pujols A. Pujols	13	2006	STL	16	52	11	15	3	0	3	6	1	10	0	1	66	27	6	0	0	5	2	.288	.439	.519	.959
23	David Ortiz D. Ortiz	13	2004	BOS	14	55	13	22	3	1	5	19	0	10	0	1	68	42	9	0	0	3	0	.400	.515	.764	1.278
24	Jorge Posada J. Posada	13	2000	NYY	16	54	6	11	4	0	0	5	1	14	0	1	68	15	4	0	0	5	1	.204	.368	.278	.645
25	Matt Williams M. Williams	13	1997	CLE	18	66	13	19	3	0	2	8	1	16	1	0	80	28	5	0	0	0	0	.288	.413	.424	.837