Hakeem Olajuwon has blocked the most shots in a game on April 21, with 10 blocks against the Spurs on April 21, 1988.

Interpreted as:

most blocks by a player in a game on april 21

	NAME	BLK	DATE	TM		OPP	MIN	PTS	REB	AST	STL	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Hakeem Olajuwon H. Olajuwon	10	4/21/1988	HOU	vs	SAS	42	38	10	4	5	15	25	60.0	0	0		8	8	100.0	66.6	0	10	1	4
2	Jim McIlvaine J. McIlvaine	9	4/21/1996	WAS	vs	CHI	35	6	11	0	1	3	3	100.0	0	0		0	1	0.0	87.2	4	7	0	3
3	Hakeem Olajuwon H. Olajuwon	9	4/21/1991	HOU	vs	DEN	34	26	13	5	0	12	17	70.6	0	0		2	3	66.7	71.0	3	10	5	3
4	David Robinson D. Robinson	9	4/21/1991	SAS	vs	DAL	30	16	9	3	3	7	7	100.0	0	0		2	4	50.0	91.3	1	8	2	3
5	Hakeem Olajuwon H. Olajuwon	8	4/21/1989	HOU	@	PHX	42	26	16	5	2	12	22	54.5	0	0		2	4	50.0	54.7	2	14	4	4
6	Darryl Dawkins D. Dawkins	8	4/21/1982	PHI	vs	ATL	38	27	9	2		12	17	70.6	0	0		3	3	100.0	73.7				3
7	Clarence Weatherspoon C. Weatherspoon	7	4/21/1996	PHI	@	TOR	46	35	14	3	1	14	26	53.8	0	0		7	10	70.0	57.6	6	8	2	4
8	Alton Lister A. Lister	7	4/21/1989	SEA	@	LAC	36	18	19	0	2	6	17	35.3	0	0		6	8	75.0	43.9	9	10	2	5
9	Tim Duncan T. Duncan	6	4/21/2003	SAS	vs	PHX	46	22	12	2	0	9	15	60.0	0	0		4	6	66.7	62.4	1	11	2	2	+10
10	Shareef Abdur-Rahim S. Abdur-Rahim	6	4/21/1999	VAN	vs	LAC	36	29	6	1	2	11	20	55.0	0	1	0.0	7	9	77.8	60.5	2	4	2	3	+2
11	Hakeem Olajuwon H. Olajuwon	6	4/21/1994	HOU	vs	DAL	32	21	14	3	2	9	14	64.3	0	0		3	4	75.0	66.6	2	12	3	2
12	Chris Dudley C. Dudley	6	4/21/1991	NJN	@	ORL	26	10	7	1	0	3	6	50.0	0	0		4	8	50.0	52.5	2	5	0	3
13	Mark Eaton M. Eaton	6	4/21/1985	UTA	@	HOU	34	4	11	3	1	2	5	40.0	0	0		0	0		40.0	1	10	5	4
14	Tree Rollins T. Rollins	6	4/21/1982	ATL	@	PHI	36	3	4	2	0	1	4	25.0	0	0		1	2	50.0	30.7				2
15	Elvin Hayes E. Hayes	6	4/21/1982	HOU	@	SEA	46	15	8	0	0	5	16	31.3	0	0		5	7	71.4	39.3	2	6	0	3
16	Chet Holmgren C. Holmgren	5	4/21/2024	OKC	vs	NOP	32	15	11	2	1	6	14	42.9	2	6	33.3	1	2	50.0	50.4	2	9	3	0	+1
17	Karl-Anthony Towns K. Towns	5	4/21/2022	MIN	vs	MEM	33	8	5	1	0	3	4	75.0	0	1	0.0	2	2	100.0	82.0	1	4	4	5	-4
18	Freddie Gillespie F. Gillespie	5	4/21/2021	TOR	vs	BKN	24	4	5	1	1	1	4	25.0	0	0		2	2	100.0	41.0	2	3	0	3	-3
19	Jakob Poeltl J. Poeltl	5	4/21/2021	SAS	vs	MIA	29	8	9	1	1	3	3	100.0	0	0		2	2	100.0	103.1	2	7	2	2	-11
20	Joel Embiid J. Embiid	5	4/21/2018	PHI	@	MIA	31	14	12	1	1	2	11	18.2	0	4	0.0	10	13	76.9	41.9	2	10	8	4	-5
21	Timofey Mozgov T. Mozgov	5	4/21/2015	CLE	vs	BOS	29	16	7	0	0	7	11	63.6	0	0		2	2	100.0	67.3	4	3	4	6	+17
22	Serge Ibaka S. Ibaka	5	4/21/2014	OKC	vs	MEM	47	15	11	1	1	6	12	50.0	1	2	50.0	2	2	100.0	58.2	4	7	1	4	-3
23	DeAndre Jordan D. Jordan	5	4/21/2014	LAC	vs	GSW	30	11	9	1	0	2	4	50.0	0	0		7	8	87.5	73.1	3	6	1	2	+20
24	Raef LaFrentz R. LaFrentz	5	4/21/2002	DAL	vs	MIN	29	10	4	0	0	4	9	44.4	1	3	33.3	1	2	50.0	50.6	0	4	0	5	+11
25	Dikembe Mutombo D. Mutombo	5	4/21/2001	PHI	vs	IND	40	12	22	0	0	3	6	50.0	0	0		6	8	75.0	63.0	5	17	1	2	+3