Josh Hamilton has the most intentional walks in an ALCS, with 5 intentional walks.

Interpreted as:

most ibb by a player in one alcs

	NAME	IBB	SEASON	SERIES	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	GIDP	AVG	OBP	SLG	OPS
1	Josh Hamilton J. Hamilton	5	2010	ALCS	TEX	6	20	6	7	1	0	4	7	8	0	4	3	0	28	20	5	0	0	1	.350	.536	1.000	1.536
2	Vladimir Guerrero Jr. V. Guerrero Jr.	3	2025	ALCS	TOR	7	26	6	10	3	0	3	3	4	1	2	0	0	31	22	6	0	0	0	.385	.484	.846	1.330
3	Bobby Abreu B. Abreu	3	2009	ALCS	LAA	6	25	2	4	2	0	0	2	4	0	8	0	0	29	6	2	0	0	0	.160	.276	.240	.516
4	Alex Rodriguez A. Rodriguez	3	2009	ALCS	NYY	6	21	6	9	2	0	3	6	8	0	3	1	0	30	20	5	0	1	0	.429	.567	.952	1.519
5	George Brett G. Brett	3	1985	ALCS	KCR	7	23	6	8	2	0	3	5	7	0	5	0	1	30	19	5	0	0	0	.348	.500	.826	1.326
6	Cal Raleigh C. Raleigh	2	2025	ALCS	SEA	7	25	6	6	1	0	4	4	4	0	10	0	0	29	19	5	0	0	1	.240	.345	.760	1.105
7	José Ramírez J. Ramírez	2	2024	ALCS	CLE	5	19	2	5	2	0	1	3	4	0	2	2	0	24	10	3	0	1	0	.263	.375	.526	.901
8	Yordan Alvarez Y. Alvarez	2	2023	ALCS	HOU	7	27	5	13	0	1	2	9	3	1	9	0	0	32	21	3	0	1	0	.481	.531	.778	1.309
9	Yuli Gurriel Y. Gurriel	2	2021	ALCS	HOU	6	22	4	10	1	0	1	6	3	0	1	1	0	25	14	2	0	0	1	.455	.520	.636	1.156
10	Miguel Cabrera M. Cabrera	2	2011	ALCS	DET	6	20	5	8	4	0	3	7	7	0	6	1	0	27	21	7	0	0	0	.400	.556	1.050	1.606
11	David Murphy D. Murphy	2	2010	ALCS	TEX	6	13	6	3	1	0	1	2	4	0	4	0	0	17	7	2	0	0	0	.231	.412	.538	.950
12	Victor Martinez V. Martinez	2	2007	ALCS	CLE	7	27	4	8	1	0	1	3	3	0	5	0	0	30	12	2	0	0	0	.296	.367	.444	.811
13	Jorge Posada J. Posada	2	2004	ALCS	NYY	7	27	4	7	1	0	0	2	7	1	1	0	0	36	8	1	0	1	1	.259	.417	.296	.713
14	Ichiro Suzuki I. Suzuki	2	2001	ALCS	SEA	5	18	3	4	1	0	0	1	4	0	4	2	0	22	5	1	0	0	0	.222	.364	.278	.641
15	Scott Brosius S. Brosius	2	1998	ALCS	NYY	6	20	2	6	1	0	1	6	2	0	4	0	0	24	10	2	1	1	0	.300	.348	.500	.848
16	Roberto Alomar R. Alomar	2	1997	ALCS	BAL	6	22	2	4	0	0	1	2	7	0	3	0	0	29	7	1	0	0	2	.182	.379	.318	.697
17	Edgar Martinez E. Martinez	2	1995	ALCS	SEA	6	23	0	2	0	0	0	0	2	1	5	1	1	26	2	0	0	0	1	.087	.192	.087	.279
18	Tony Fernandez T. Fernandez	2	1993	ALCS	TOR	6	22	1	7	0	0	0	1	2	0	4	0	0	25	7	0	1	0	1	.318	.375	.318	.693
19	Frank Thomas F. Thomas	2	1993	ALCS	CWS	6	17	2	6	0	0	1	3	10	0	5	0	0	27	9	1	0	0	0	.353	.593	.529	1.122
20	Robin Ventura R. Ventura	2	1993	ALCS	CWS	6	20	2	4	0	0	1	5	6	0	6	0	0	27	7	1	0	1	0	.200	.370	.350	.720
21	Mark McGwire M. McGwire	2	1992	ALCS	OAK	6	20	1	3	0	0	1	3	5	1	4	0	0	27	6	1	1	0	0	.150	.346	.300	.646
22	Harold Baines H. Baines	2	1990	ALCS	OAK	4	14	2	5	1	0	0	3	2	0	1	1	0	17	6	1	1	0	1	.357	.438	.429	.866
23	Kent Hrbek K. Hrbek	2	1987	ALCS	MIN	5	20	4	3	0	0	1	1	3	0	0	0	0	23	6	1	0	0	1	.150	.261	.300	.561
24	Ruppert Jones R. Jones	2	1986	ALCS	CAL	6	17	4	3	1	0	0	2	5	0	2	0	0	23	4	1	0	1	0	.176	.348	.235	.583
25	Eddie Murray E. Murray	2	1979	ALCS	BAL	4	12	3	5	0	0	1	5	5	0	2	0	1	17	8	1	0	0	0	.417	.588	.667	1.255