Tim Duncan has averaged the most blocks per game in an NBA Finals with 5.3 per game.

Interpreted as:

highest blocks by a player averages in a finals

	NAME	BPG	SEASON	SERIES	TM	GP	MPG	PPG	RPG	APG	SPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Tim Duncan T. Duncan	5.3	2002-03	NBA Finals	SAS	6	43.8	24.2	17.0	5.3	1.0	9.0	18.2	49.5	0.0	0.3	0.0	6.2	9.0	68.5	54.6	3.8	13.2	3.8	263	145	102	32	6	32	23	16	+42
2	Kareem Abdul-Jabbar K. Abdul-Jabbar	4.6	1979-80	NBA Finals	LAL	5	40.6	33.4	13.6	3.2	0.6	14.6	26.6	54.9	0.0	0.0		4.2	5.2	80.8	57.8	3.2	10.4	4.2	203	167	68	16	3	23	21	20
3	Patrick Ewing P. Ewing	4.3	1993-94	NBA Finals	NYK	7	44.0	18.9	12.4	1.7	1.3	8.3	22.9	36.3	0.1	0.7	20.0	2.1	3.0	71.4	39.0	4.6	7.9	3.1	308	132	87	12	9	30	22	29
4	Dwight Howard D. Howard	4.0	2008-09	NBA Finals	ORL	5	42.6	15.4	15.2	2.2	1.6	4.2	8.6	48.8	0.0	0.0		7.0	11.6	60.3	56.2	3.6	11.6	4.0	213	77	76	11	8	20	20	20	-38
5	Hakeem Olajuwon H. Olajuwon	3.9	1993-94	NBA Finals	HOU	7	43.1	26.9	9.1	3.6	1.6	10.7	21.4	50.0	0.1	0.1	100.0	5.3	6.1	86.0	55.6	1.9	7.3	3.6	302	188	64	25	11	27	25	26
6	Bill Walton B. Walton	3.7	1976-77	NBA Finals	POR	6	37.7	18.5	19.0	5.2	1.0	8.0	14.7	54.5				2.5	3.2	78.9	57.6	3.8	15.2		226	111	114	31	6	22		23
7	Shaquille O'Neal S. O'Neal	3.4	2000-01	NBA Finals	LAL	5	45.0	33.0	15.8	4.8	0.4	12.6	22.0	57.3	0.0	0.0		7.8	15.2	51.3	57.5	6.2	9.6	4.0	225	165	79	24	2	17	20	20	+40
8	Jack Sikma J. Sikma	3.2	1978-79	NBA Finals	SEA	5	44.0	15.8	14.8	2.0	1.2	7.0	13.6	51.5				1.8	2.8	64.3	53.3	2.4	12.4	2.4	220	79	74	10	6	16	12	20
9	Hakeem Olajuwon H. Olajuwon	3.2	1985-86	NBA Finals	HOU	6	40.2	24.7	11.8	1.8	2.3	9.3	19.5	47.9	0.0	0.0		6.0	9.0	66.7	52.6	4.5	7.3	2.7	241	148	71	11	14	19	16	26
10	Kareem Abdul-Jabbar K. Abdul-Jabbar	3.2	1981-82	NBA Finals	LAL	6	35.3	18.0	7.7	3.8	1.3	7.2	13.5	53.1	0.0	0.0		3.7	6.8	53.7	54.5	2.2	5.5	2.7	212	108	46	23	8	19	16	21
11	Ben Wallace B. Wallace	3.0	2004-05	NBA Finals	DET	7	40.0	10.7	10.3	1.0	1.7	4.7	8.3	56.9	0.0	0.0		1.3	3.0	42.9	55.8	3.9	6.4	1.0	280	75	72	7	12	21	7	19	+3
12	David Robinson D. Robinson	3.0	1998-99	NBA Finals	SAS	5	37.0	16.6	11.8	2.4	1.0	5.0	11.8	42.4	0.0	0.0		6.6	9.6	68.8	51.8	2.8	9.0	1.6	185	83	59	12	5	15	8	16	+44
13	Caldwell Jones C. Jones	3.0	1981-82	NBA Finals	PHI	6	29.5	6.0	7.8	0.8	0.8	2.7	7.2	37.2	0.0	0.0		0.7	1.2	57.1	39.1	2.3	5.5	0.5	177	36	47	5	5	18	3	23
14	Robert Williams III R. Williams III	2.8	2021-22	NBA Finals	BOS	6	26.4	7.5	7.5	1.5	0.8	3.3	4.3	76.9	0.0	0.0		0.8	1.0	83.3	78.6	2.8	4.7	0.7	158	45	45	9	5	17	4	10	+30
15	Shaquille O'Neal S. O'Neal	2.8	2001-02	NBA Finals	LAL	4	41.5	36.3	12.3	3.8	0.5	12.5	21.0	59.5	0.0	0.0		11.3	17.0	66.2	63.6	3.3	9.0	3.5	166	145	49	15	2	11	14	7	+45
16	John Salley J. Salley	2.8	1988-89	NBA Finals	DET	4	20.3	7.5	2.5	1.3	0.3	3.3	4.8	68.4	0.0	0.0		1.0	1.8	57.1	67.9	0.5	2.0	0.5	81	30	10	5	1	11	2	14
17	Julius Erving J. Erving	2.8	1982-83	NBA Finals	PHI	4	38.3	19.0	8.5	5.0	1.3	7.5	16.0	46.9	0.0	0.0		4.0	5.0	80.0	52.2	2.3	6.3	2.3	153	76	34	20	5	11	9	11
18	Elvin Hayes E. Hayes	2.8	1974-75	NBA Finals	WAS	4	42.3	20.8	10.8	1.8	1.5	8.0	19.3	41.6				4.8	7.0	67.9	46.5	3.3	7.5		169	83	43	7	6	11		16
19	George Johnson G. Johnson	2.8	1974-75	NBA Finals	GSW	4	18.3	6.5	7.5	1.3	0.3	2.8	4.3	64.7				1.0	1.0	100.0	69.3	4.0	3.5		73	26	30	5	1	11		13
20	Shaquille O'Neal S. O'Neal	2.7	1999-00	NBA Finals	LAL	6	45.5	38.0	16.7	2.3	1.0	16.0	26.2	61.1	0.0	0.0		6.0	15.5	38.7	57.6	5.7	11.0	2.2	273	228	100	14	6	16	13	20	+8
21	Caldwell Jones C. Jones	2.7	1979-80	NBA Finals	PHI	6	33.7	9.0	8.3	1.8	0.2	3.3	7.0	47.6	0.0	0.0		2.3	3.3	70.0	53.1	1.8	6.5	1.5	202	54	50	11	1	16	9	24
22	Pau Gasol P. Gasol	2.6	2009-10	NBA Finals	LAL	7	41.9	18.6	11.6	3.7	0.7	6.1	12.9	47.8	0.0	0.3	0.0	6.3	8.7	72.1	55.6	5.0	6.6	1.9	293	130	81	26	5	18	13	21	+12
23	Marvin Webster M. Webster	2.6	1977-78	NBA Finals	SEA	7	42.9	14.9	13.9	2.1	0.3	5.7	12.7	44.9				3.4	4.9	70.6	50.0	4.7	9.1	3.6	300	104	97	15	2	18	25	27
24	Shaquille O'Neal S. O'Neal	2.5	1994-95	NBA Finals	ORL	4	45.0	28.0	12.5	6.3	0.3	11.0	18.5	59.5	0.0	0.0		6.0	10.5	57.1	60.6	2.8	9.8	5.3	180	112	50	25	1	10	21	18
25	Kareem Abdul-Jabbar K. Abdul-Jabbar	2.5	1986-87	NBA Finals	LAL	6	33.8	21.7	7.3	0.8	0.5	8.3	16.3	51.0	0.0	0.2	0.0	5.0	7.5	66.7	55.2	2.5	4.8	1.7	203	130	44	5	3	15	10	19