I didn't find anything for this season, but Jay Huff had the highest block percentage in the 2025 playoffs, at 14.7 percent.

Interpreted as:

highest blk% by a player this playoffs

	NAME	BLK%	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Jay Huff J. Huff	14.7	2	9.0	4.0	1.5	0.5	0.0	1.5	1.0	2.0	50.0	0.0	0.5	0.0	2.0	2.0	100.0	69.4	0.5	1.0	0.5	18	8	3	1	0	3	1	1	-7
2	Reed Sheppard R. Sheppard	11.0	3	3.3	0.0	0.3	0.3	0.7	0.3	0.0	0.7	0.0	0.0	0.7	0.0	0.0	0.0		0.0	0.0	0.3	0.3	10	0	1	1	2	1	1	1	-26
3	James Johnson J. Johnson	10.2	5	3.6	1.4	0.2	0.4	0.4	0.4	0.6	1.0	60.0	0.0	0.2	0.0	0.2	0.4	50.0	59.5	0.0	0.2	0.2	18	7	1	2	2	2	1	3	-10
4	Goga Bitadze G. Bitadze	9.3	3	3.7	0.7	1.0	0.3	0.0	0.3	0.3	0.3	100.0	0.0	0.0		0.0	0.0		100.0	0.0	1.0	0.0	11	2	3	1	0	1	0	6	-5
5	Isaiah Stewart I. Stewart	8.8	1	19.0	2.0	5.0	1.0	0.0	2.0	1.0	2.0	50.0	0.0	0.0		0.0	0.0		50.0	1.0	4.0	0.0	19	2	5	1	0	2	0	5	+8
6	Ben Simmons B. Simmons	8.2	5	8.4	0.8	1.4	0.8	0.2	0.8	0.4	1.2	33.3	0.0	0.0		0.0	0.0		33.3	0.6	0.8	0.4	42	4	7	4	1	4	2	11	+7
7	Zach Edey Z. Edey	8.2	4	27.0	6.3	7.8	1.8	0.0	2.5	2.5	3.8	66.7	0.0	0.0		1.3	1.8	71.4	69.1	2.8	5.0	1.5	108	25	31	7	0	10	6	12	-58
8	Braxton Key B. Key	8.0	5	4.6	0.4	1.8	0.2	0.4	0.4	0.2	1.6	12.5	0.0	0.2	0.0	0.0	0.0		12.5	1.0	0.8	0.6	23	2	9	1	2	2	3	4	+15
9	Tristan Thompson T. Thompson	7.0	3	9.7	2.3	5.0	0.3	0.3	0.7	1.0	2.0	50.0	0.0	0.0		0.3	1.0	33.3	47.8	0.7	4.3	0.7	29	7	15	1	1	2	2	2	+27
10	Luke Kornet L. Kornet	6.6	11	16.4	4.5	3.9	0.5	0.5	1.2	1.9	2.6	72.4	0.0	0.0		0.7	0.7	100.0	76.9	1.5	2.5	0.5	180	50	43	5	6	13	5	20	+33
11	Brook Lopez B. Lopez	6.5	5	14.8	5.0	1.6	0.8	0.2	1.0	1.6	4.4	36.4	0.8	3.0	26.7	1.0	1.0	100.0	51.7	0.6	1.0	0.8	74	25	8	4	1	5	4	11	-26
12	Chet Holmgren C. Holmgren	6.3	23	29.8	15.2	8.7	1.0	0.7	1.9	5.3	11.6	46.2	1.2	4.0	29.7	3.3	4.2	78.4	56.5	1.8	6.8	1.2	686	349	199	22	17	43	28	47	+169
13	Myles Turner M. Turner	6.2	23	29.3	13.8	4.8	1.4	0.5	2.0	4.6	9.5	48.4	1.3	3.9	34.4	3.2	4.2	77.1	60.7	1.2	3.6	1.7	675	317	110	32	12	46	38	68	+52
14	Nicolas Batum N. Batum	6.0	7	24.6	5.6	3.9	2.0	0.9	1.7	1.9	4.7	39.4	1.9	4.7	39.4	0.0	0.0		59.1	0.6	3.3	0.4	172	39	27	14	6	12	3	13	0
15	Derrick Jones Jr. D. Jones Jr.	6.0	7	18.4	7.3	1.9	0.3	0.6	1.3	3.0	6.9	43.8	0.9	2.9	30.0	0.4	1.1	37.5	49.5	0.7	1.1	0.4	129	51	13	2	4	9	3	3	0
16	Tari Eason T. Eason	5.8	7	18.9	7.6	4.3	0.7	1.1	1.0	3.0	6.3	47.7	1.0	2.7	36.8	0.6	1.1	50.0	55.8	1.0	3.3	1.4	132	53	30	5	8	7	10	13	-27
17	Craig Porter Jr. C. Porter Jr.	5.8	6	5.8	2.0	1.0	1.5	0.5	0.3	1.0	2.0	50.0	0.0	0.5	0.0	0.0	0.0		50.0	0.5	0.5	0.3	35	12	6	9	3	2	2	2	+24
18	Steven Adams S. Adams	5.7	7	22.1	5.7	6.6	0.6	0.4	1.1	1.7	2.9	60.0	0.0	0.0		2.3	4.3	53.3	60.2	3.3	3.3	0.7	155	40	46	4	3	8	5	7	+44
19	Zeke Nnaji Z. Nnaji	5.4	6	5.7	1.2	1.2	0.3	0.2	0.3	0.2	1.3	12.5	0.2	1.0	16.7	0.7	1.2	57.1	31.6	0.5	0.7	0.3	34	7	7	2	1	2	2	6	-19
20	Andrew Wiggins A. Wiggins	4.7	4	30.5	11.5	3.3	2.3	0.3	1.3	4.0	10.8	37.2	1.8	5.0	35.0	1.8	2.5	70.0	48.5	1.0	2.3	2.8	122	46	13	9	1	5	11	6	-80
21	Paul Reed P. Reed	4.7	5	10.6	2.8	3.0	0.2	1.0	0.6	1.0	1.6	62.5	0.0	0.0		0.8	1.2	66.7	65.8	1.4	1.6	1.0	53	14	15	1	5	3	5	8	+9
22	Rudy Gobert R. Gobert	4.3	15	27.4	7.9	8.6	0.7	0.5	1.2	3.1	5.3	58.2	0.0	0.0		1.7	3.3	52.0	58.4	3.1	5.5	0.9	411	118	129	11	8	18	13	38	+59
23	Josh Minott J. Minott	4.3	5	4.6	1.0	0.0	0.4	0.0	0.2	0.4	1.6	25.0	0.2	1.2	16.7	0.0	0.0		31.3	0.0	0.0	0.4	23	5	0	2	0	1	2	1	-1
24	LeBron James L. James	4.3	5	40.8	25.4	9.0	5.6	2.0	1.8	8.6	17.6	48.9	2.0	5.6	35.7	6.2	8.0	77.5	60.1	2.4	6.6	2.6	204	127	45	28	10	9	13	8	-41
25	Peyton Watson P. Watson	4.1	14	14.2	4.5	2.9	0.3	0.8	0.6	1.7	4.2	40.7	0.5	1.4	36.8	0.6	1.1	50.0	47.7	1.0	1.9	0.6	199	63	41	4	11	9	8	21	-110