Cody Bellinger has the most strikeouts in a postseason, with 29 strikeouts in his rookie season in 2017.

Interpreted as:

the most strikeouts by a player in a post season

	NAME	SO	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Cody Bellinger C. Bellinger	29	2017	LAD	15	64	10	14	4	1	3	9	3	0	1	0	67	29	8	0	0	0	1	.219	.254	.453	.707
2	Brandon Lowe B. Lowe	28	2020	TBR	20	76	7	9	0	0	4	8	6	0	0	0	82	21	4	0	0	0	2	.118	.183	.276	.459
3	Mike Zunino M. Zunino	27	2020	TBR	19	53	4	9	0	0	4	8	1	1	0	0	56	21	4	0	1	0	1	.170	.196	.396	.593
4	Carlos Correa C. Correa	27	2019	HOU	18	68	5	13	4	0	3	9	6	0	1	0	74	26	7	0	0	0	1	.191	.257	.382	.639
5	Aaron Judge A. Judge	27	2017	NYY	13	48	9	9	3	0	4	11	9	0	0	1	57	24	7	0	0	0	1	.188	.316	.500	.816
6	Alfonso Soriano A. Soriano	26	2003	NYY	17	71	4	16	2	0	1	9	3	1	5	1	75	21	3	0	0	0	2	.225	.267	.296	.562
7	Austin Riley A. Riley	25	2021	ATL	16	65	7	18	5	0	2	8	3	0	0	0	68	29	7	0	0	0	0	.277	.309	.446	.755
8	Willy Adames W. Adames	25	2020	TBR	20	59	3	8	4	0	0	4	13	1	1	1	73	12	4	0	0	0	1	.136	.301	.203	.505
9	Rhys Hoskins R. Hoskins	24	2022	PHI	17	69	9	11	1	0	6	12	4	0	0	0	73	30	7	0	0	0	2	.159	.205	.435	.640
10	J.T. Realmuto	24	2022	PHI	17	65	11	14	1	0	3	6	6	1	0	0	72	24	4	0	0	0	0	.215	.292	.369	.661
11	Chris Taylor C. Taylor	24	2020	LAD	16	58	8	12	4	0	1	3	5	0	0	0	63	19	5	0	0	0	0	.207	.270	.328	.597
12	Will Smith W. Smith	24	2020	LAD	18	69	7	14	4	0	2	13	6	0	0	0	75	24	6	0	0	1	0	.203	.267	.348	.614
13	Shohei Ohtani S. Ohtani	23	2025	LAD	16	63	13	16	3	1	8	14	15	0	1	1	78	45	12	0	0	9	0	.254	.397	.714	1.112
14	Travis d'Arnaud T. d'Arnaud	23	2021	ATL	16	55	7	13	1	0	2	3	6	0	0	0	61	20	3	0	0	0	4	.236	.311	.364	.675
15	Max Muncy M. Muncy	23	2018	LAD	16	50	10	10	1	0	3	6	12	0	1	0	62	20	4	0	0	0	0	.200	.355	.400	.755
16	Enrique Hernández E. Hernández	22	2025	LAD	16	59	9	15	4	0	1	7	4	0	0	0	64	22	5	0	1	0	0	.254	.297	.373	.670
17	Shohei Ohtani S. Ohtani	22	2024	LAD	16	61	14	14	1	0	3	10	13	1	0	2	75	24	4	0	0	0	0	.230	.373	.393	.767
18	Austin Wells A. Wells	22	2024	NYY	14	50	3	6	1	0	2	4	4	1	1	0	55	13	3	0	0	0	4	.120	.200	.260	.460
19	Nathaniel Lowe N. Lowe	22	2023	TEX	17	66	10	14	2	0	3	6	6	0	0	0	72	25	5	0	0	0	0	.212	.278	.379	.657
20	Pat Burrell P. Burrell	22	2010	SFG	14	42	5	6	3	0	1	4	7	0	0	0	49	12	4	0	0	0	0	.143	.265	.286	.551
21	Teoscar Hernández T. Hernández	21	2025	LAD	16	67	8	18	1	0	5	12	4	0	0	0	71	34	6	0	0	0	1	.269	.310	.507	.817
22	Evan Longoria E. Longoria	21	2023	ARI	16	48	3	8	3	0	0	4	3	1	0	0	54	11	3	1	1	0	1	.167	.226	.229	.456
23	Max Muncy M. Muncy	21	2020	LAD	18	60	12	15	4	0	3	14	20	0	0	0	80	28	7	0	0	0	1	.250	.438	.467	.904
24	Juan Soto J. Soto	21	2019	WSH	17	65	12	18	3	0	5	14	9	1	1	0	75	36	8	0	0	2	0	.277	.373	.554	.927
25	Yordan Alvarez Y. Alvarez	21	2019	HOU	18	58	5	14	3	0	1	3	7	0	0	0	65	20	4	0	0	1	0	.241	.323	.345	.668