Derek Harper blocked his most shots in a game against the Jazz on April 17, 1990, with 4 blocks.

Interpreted as:

Derek Harper most blocks in a regular-season game

	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	Derek Harper D. Harper	4	4/17/1990	DAL	vs	UTA	39	24	5	8	1	11	19	57.9	1	3	33.3	1	2	50.0	60.4	0	5	1	3
2	Derek Harper D. Harper	3	1/10/1990	DAL	@	GSW	43	17	3	10	5	6	15	40.0	0	3	0.0	5	5	100.0	49.4	0	3	3	3
3	Derek Harper D. Harper	3	11/11/1988	DAL	vs	SAS	38	25	3	8	3	8	13	61.5	1	2	50.0	8	8	100.0	75.7	1	2	4	3
4	Derek Harper D. Harper	3	4/15/1987	DAL	vs	HOU	26	31	1	6	0	13	17	76.5	2	4	50.0	3	3	100.0	84.6	0	1	0	3
5	Derek Harper D. Harper	3	2/12/1987	DAL	@	SAC	39	24	1	5	3	10	18	55.6	2	5	40.0	2	4	50.0	60.7	0	1	1	4
6	Derek Harper D. Harper	2	3/18/1997	DAL	vs	WAS	35	11	2	1	1	5	11	45.5	1	3	33.3	0	0		50.0	0	2	2	4	-6
7	Derek Harper D. Harper	2	2/4/1997	DAL	vs	SAC	24	16	0	3	3	6	10	60.0	2	3	66.7	2	2	100.0	73.5	0	0	2	1	-3
8	Derek Harper D. Harper	2	3/24/1996	NYK	@	DAL	41	13	7	6	5	6	13	46.2	1	4	25.0	0	0		50.0	1	6	2	1
9	Derek Harper D. Harper	2	3/23/1995	NYK	@	DEN	31	16	3	4	0	4	9	44.4	2	2	100.0	6	6	100.0	68.7	1	2	0	4
10	Derek Harper D. Harper	2	11/13/1993	DAL	vs	UTA	32	15	3	3	0	6	16	37.5	2	5	40.0	1	3	33.3	43.3	1	2	4	3
11	Derek Harper D. Harper	2	3/3/1992	DAL	@	NYK	32	13	2	7	0	4	10	40.0	0	1	0.0	5	6	83.3	51.4	0	2	3	2
12	Derek Harper D. Harper	2	2/26/1991	DAL	@	MIN	41	25	5	8	4	9	17	52.9	1	1	100.0	6	9	66.7	59.6	1	4	2	2
13	Derek Harper D. Harper	2	12/29/1989	DAL	vs	POR	52	42	3	5	4	15	26	57.7	4	8	50.0	8	8	100.0	71.1	0	3	3	4
14	Derek Harper D. Harper	2	11/14/1989	DAL	@	SEA	43	13	4	4	3	5	14	35.7	0	1	0.0	3	3	100.0	42.4	0	4	0	3
15	Derek Harper D. Harper	2	3/13/1989	DAL	vs	MIL	33	12	4	0	1	5	9	55.6	1	3	33.3	1	2	50.0	60.7	0	4	2	2
16	Derek Harper D. Harper	2	2/18/1989	DAL	vs	HOU	26	19	2	7	3	8	15	53.3	2	5	40.0	1	3	33.3	58.2	0	2	5	1
17	Derek Harper D. Harper	2	2/9/1989	DAL	@	UTA	40	15	2	11	0	6	15	40.0	1	5	20.0	2	3	66.7	46.0	0	2	3	1
18	Derek Harper D. Harper	2	1/27/1989	DAL	vs	SAS	34	15	1	2	2	7	18	38.9	0	4	0.0	1	1	100.0	40.7	0	1	0	3
19	Derek Harper D. Harper	2	1/25/1989	DAL	vs	LAC	35	23	5	9	5	9	15	60.0	4	7	57.1	1	3	33.3	70.5	0	5	4	3
20	Derek Harper D. Harper	2	1/9/1989	DAL	vs	PHI	41	38	2	3	3	16	29	55.2	6	12	50.0	0	1	0.0	64.5	0	2	2	4
21	Derek Harper D. Harper	2	12/13/1988	DAL	vs	GSW	35	14	4	8	3	5	12	41.7	2	4	50.0	2	2	100.0	54.3	1	3	1	4
22	Derek Harper D. Harper	2	12/2/1988	DAL	vs	NYK	39	19	4	11	3	7	14	50.0	1	5	20.0	4	4	100.0	60.3	0	4	2	0
23	Derek Harper D. Harper	2	11/30/1988	DAL	vs	HOU	38	21	1	2	2	7	14	50.0	0	3	0.0	7	8	87.5	59.9	0	1	3	1
24	Derek Harper D. Harper	2	11/19/1988	DAL	@	SEA	43	22	1	7	2	7	12	58.3	0	0		8	8	100.0	70.9	0	1	2	1
25	Derek Harper D. Harper	2	11/8/1988	DAL	vs	MIA	40	10	1	10	2	5	11	45.5	0	1	0.0	0	0		45.5	1	0	1	3