Derek Harper had his most assists in a game against the Celtics on December 29, 1988, with 18 assists.

Interpreted as:

Derek Harper most assists in a regular-season game

	NAME	AST	DATE	TM		OPP	MIN	PTS	REB	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Derek Harper D. Harper	18	12/29/1988	DAL	vs	BOS	40	18	2	1	1	6	18	33.3	1	4	25.0	5	5	100.0	44.6	1	1	2	2
2	Derek Harper D. Harper	17	2/19/1990	DAL	@	CLE	41	19	3	4	0	7	15	46.7	2	4	50.0	3	4	75.0	56.7	3	0	1	2
3	Derek Harper D. Harper	16	1/22/1992	DAL	vs	MIL	44	11	2	1	1	4	14	28.6	0	3	0.0	3	4	75.0	34.9	0	2	2	2
4	Derek Harper D. Harper	16	11/10/1987	DAL	@	SEA	39	14	5	2	0	5	11	45.5	0	0		4	6	66.7	51.3	0	5	1	2
5	Derek Harper D. Harper	15	11/10/1989	DAL	vs	POR	41	14	3	5	0	3	11	27.3	0	1	0.0	8	11	72.7	44.2	0	3	2	1
6	Derek Harper D. Harper	15	1/26/1988	DAL	vs	SAS	39	17	1	2	0	8	15	53.3	0	4	0.0	1	1	100.0	55.1	0	1	2	1
7	Derek Harper D. Harper	15	12/29/1987	DAL	vs	SAC	43	21	4	4	1	9	19	47.4	2	4	50.0	1	1	100.0	54.0	0	4	2	2
8	Derek Harper D. Harper	15	3/19/1987	DAL	@	SAC	39	6	3	0	0	3	12	25.0	0	1	0.0	0	0		25.0	0	3	3	5
9	Derek Harper D. Harper	15	12/10/1986	DAL	vs	POR	37	20	0	6	0	7	14	50.0	2	5	40.0	4	5	80.0	61.7	0	0	6	3
10	Derek Harper D. Harper	14	2/15/1991	DAL	vs	WAS	37	17	6	5	0	5	12	41.7	0	0		7	10	70.0	51.8	1	5	4	4
11	Derek Harper D. Harper	14	2/13/1991	DAL	@	CLE	37	14	3	1	0	6	15	40.0	1	3	33.3	1	2	50.0	44.1	0	3	1	1
12	Derek Harper D. Harper	14	3/17/1989	DAL	@	LAL	37	10	1	5	1	5	12	41.7	0	2	0.0	0	0		41.7	0	1	0	2
13	Derek Harper D. Harper	14	1/22/1988	DAL	vs	LAC	40	16	2	6	0	7	13	53.8	0	1	0.0	2	2	100.0	57.6	0	2	5	0
14	Derek Harper D. Harper	14	11/18/1986	DAL	vs	LAL	38	22	1	5	0	10	21	47.6	1	3	33.3	1	2	50.0	50.3	1	0	2	4
15	Derek Harper D. Harper	13	1/10/1995	NYK	vs	IND	41	16	2	1	0	7	9	77.8	2	3	66.7	0	0		88.9	0	2	0	1
16	Derek Harper D. Harper	13	2/5/1993	DAL	vs	IND	40	22	2	2	0	9	22	40.9	1	5	20.0	3	4	75.0	46.3	1	1	2	3
17	Derek Harper D. Harper	13	4/3/1990	DAL	@	PHX	40	20	2	3	0	7	14	50.0	0	2	0.0	6	6	100.0	60.1	2	0	3	6
18	Derek Harper D. Harper	13	3/19/1990	DAL	@	ATL	36	21	1	4	0	8	19	42.1	1	4	25.0	4	4	100.0	50.6	0	1	0	4
19	Derek Harper D. Harper	13	1/19/1988	DAL	@	POR	41	8	6	3	1	3	12	25.0	0	1	0.0	2	4	50.0	29.1	2	4	3	4
20	Derek Harper D. Harper	13	3/4/1987	DAL	vs	DEN	37	9	2	2	0	4	12	33.3	1	3	33.3	0	0		37.5	0	2	0	0
21	Derek Harper D. Harper	13	2/27/1987	DAL	vs	PHI	22	13	1	3	1	5	8	62.5	2	4	50.0	1	2	50.0	73.2	0	1	0	1
22	Derek Harper D. Harper	13	12/20/1986	DAL	vs	LAL	38	21	4	5	0	7	14	50.0	0	3	0.0	7	11	63.6	55.7	2	2	2	3
23	Derek Harper D. Harper	13	11/29/1986	DAL	vs	UTA	40	23	4	1	0	9	14	64.3	3	4	75.0	2	3	66.7	75.1	2	2	1	4
24	Derek Harper D. Harper	12	2/1/1996	NYK	vs	ORL	38	15	2	3	0	6	8	75.0	1	2	50.0	2	3	66.7	80.5	1	1	2	1
25	Derek Harper D. Harper	12	4/4/1995	NYK	vs	IND	38	11	3	1	0	4	15	26.7	1	6	16.7	2	3	66.7	33.7	1	2	1	4