Dwight Howard has blocked the most shots in an NBA Finals game, with 9 blocks against the Lakers on June 11, 2009.

what are the most blocks by a player in a finals game

NAME	BLK	DATE	SEASON	SERIES	TM		OPP	MIN	PTS	REB	AST	STL	TOV	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	PF	+/-
Dwight Howard	9	6/11/2009	2008-09	NBA Finals	ORL	vs	LAL	49	16	21	2	0	7	5	12	41.7	0	0		6	14	42.9	4	-11
Tim Duncan	8	6/15/2003	2002-03	NBA Finals	SAS	vs	NJN	46	21	20	10	0	4	9	19	47.4	0	1	0.0	3	5	60.0	2	+11
Shaquille O'Neal	8	6/8/2001	2000-01	NBA Finals	LAL	vs	PHI	45	28	20	9	1	5	12	19	63.2	0	0		4	10	40.0	5	+14
Patrick Ewing	8	6/17/1994	1993-94	NBA Finals	NYK	vs	HOU	43	25	12	1	2	3	11	21	52.4	1	1	100.0	2	2	100.0	4
Hakeem Olajuwon	8	6/5/1986	1985-86	NBA Finals	HOU	vs	BOS	47	32	14	3	2	4	13	25	52.0	0	0		6	9	66.7	3
Bill Walton	8	6/5/1977	1976-77	NBA Finals	POR	vs	PHI	42	20	23	7	0		8	15	53.3				4	5	80.0	4
Andrew Bynum	7	6/6/2010	2009-10	NBA Finals	LAL	vs	BOS	39	21	6	0	0	2	6	10	60.0	0	0		9	12	75.0	5	+1
Tim Duncan	7	6/11/2003	2002-03	NBA Finals	SAS	@	NJN	39	23	17	2	1	3	10	23	43.5	0	0		3	3	100.0	4	+4
Tim Duncan	7	6/4/2003	2002-03	NBA Finals	SAS	vs	NJN	44	32	20	6	3	1	11	17	64.7	0	0		10	14	71.4	1	+10
Patrick Ewing	7	6/12/1994	1993-94	NBA Finals	NYK	vs	HOU	46	18	13	0	1	3	9	29	31.0	0	2	0.0	0	0		3
Hakeem Olajuwon	7	6/12/1994	1993-94	NBA Finals	HOU	@	NYK	44	21	11	7	1	4	8	20	40.0	0	0		5	6	83.3	3
Dennis Johnson	7	5/28/1978	1977-78	NBA Finals	SEA	@	WAS	38	12	1	2	0	3	5	12	41.7				2	4	50.0	4
Serge Ibaka	6	6/5/2019	2018-19	NBA Finals	TOR	@	GSW	22	6	5	1	2	2	2	4	50.0	0	0		2	2	100.0	4	0
Pau Gasol	6	6/6/2010	2009-10	NBA Finals	LAL	vs	BOS	42	25	8	3	1	1	7	10	70.0	0	1	0.0	11	13	84.6	3	-12
Rasheed Wallace	6	6/9/2005	2004-05	NBA Finals	DET	@	SAS	33	4	7	1	2	1	2	5	40.0	0	0		0	0		4	-3
Patrick Ewing	6	6/10/1994	1993-94	NBA Finals	NYK	@	HOU	46	16	13	2	2	6	7	19	36.8	0	0		2	2	100.0	4
Kareem Abdul-Jabbar	6	5/4/1980	1979-80	NBA Finals	LAL	vs	PHI	41	33	14	5	0	3	14	21	66.7	0	0		5	5	100.0	4
Robert Williams III	5	6/16/2022	2021-22	NBA Finals	BOS	vs	GSW	33	10	7	2	0	2	4	8	50.0	0	0		2	2	100.0	2	-1
Giannis Antetokounmpo	5	7/20/2021	2020-21	NBA Finals	MIL	vs	PHX	42	50	14	2	0	6	16	25	64.0	1	3	33.3	17	19	89.5	2	+10
Kevin Durant	5	6/4/2017	2016-17	NBA Finals	GSW	vs	CLE	41	33	13	6	3	3	13	22	59.1	4	8	50.0	3	3	100.0	4	+21
Andrew Bogut	5	6/5/2016	2015-16	NBA Finals	GSW	vs	CLE	15	2	6	0	2	2	1	4	25.0	0	0		0	0		4	+10
Serge Ibaka	5	6/14/2012	2011-12	NBA Finals	OKC	vs	MIA	29	7	4	1	0	0	2	5	40.0	0	0		3	4	75.0	2	-15
Robert Horry	5	6/10/2007	2006-07	NBA Finals	SAS	vs	CLE	26	5	9	4	0	0	1	3	33.3	1	2	50.0	2	2	100.0	3	+27
Tim Duncan	5	6/7/2007	2006-07	NBA Finals	SAS	vs	CLE	39	24	13	1	2	2	10	17	58.8	0	0		4	5	80.0	2	+8
Alonzo Mourning	5	6/20/2006	2005-06	NBA Finals	MIA	@	DAL	14	8	6	0	0	1	3	4	75.0	0	0		2	3	66.7	4	+11