The Boston Celtics got their most steals in a game 4 times, with 21 steals.

Interpreted as:

celtic most steals in a regular-season game

	TEAM	STL	DATE	TM		OPP	RESULT	MIN	PTS	REB	AST	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Celtics	21	1/10/1998	BOS	@	ORL	L 82-90	240	82	41	20	2	36	95	37.9	5	23	21.7	5	7	71.4	41.8	21	20	19	31
2	Celtics	21	12/30/1997	BOS	@	PHX	L 90-100	240	90	42	14	3	33	86	38.4	4	16	25.0	20	30	66.7	45.4	18	24	18	23
3	Celtics	21	3/26/1983	BOS	@	CHI	L 108-118	240	108	48	22	3	41	101	40.6	0	2	0.0	26	39	66.7	45.7	22	26	18	30
4	Celtics	21	1/18/1981	BOS	vs	LAL	W 98-96	240	98	34	24	4	39	78	50.0	1	3	33.3	19	27	70.4	54.5	14	20	23	19
5	Celtics	20	4/12/2015	BOS	vs	CLE	W 117-78	240	117	38	29	1	46	84	54.8	10	24	41.7	15	22	68.2	62.4	6	32	9	22
6	Celtics	20	11/7/2009	BOS	@	NJN	W 86-76	240	86	37	21	3	31	69	44.9	1	10	10.0	23	29	79.3	52.6	3	34	12	16
7	Celtics	20	11/7/2007	BOS	vs	DEN	W 119-93	240	119	38	32	2	49	76	64.5	7	19	36.8	14	22	63.6	69.4	7	31	22	21
8	Celtics	19	11/11/2002	BOS	vs	UTA	W 112-95	240	112	34	28	5	41	85	48.2	10	29	34.5	20	23	87.0	58.9	10	24	18	28
9	Celtics	19	3/10/2000	BOS	vs	CHI	W 104-74	240	104	50	26	2	38	84	45.2	4	11	36.4	24	32	75.0	53.0	14	36	15	34
10	Celtics	19	12/8/1999	BOS	vs	DEN	W 115-90	240	115	48	33	5	47	91	51.6	4	13	30.8	17	20	85.0	57.6	9	39	16	30
11	Celtics	19	2/17/1999	BOS	@	VAN	W 131-129	315	131	43	29	6	48	104	46.2	5	14	35.7	30	43	69.8	53.3	17	26	19	40
12	Celtics	18	11/6/2015	BOS	vs	WAS	W 118-98	240	118	53	24	5	44	97	45.4	12	30	40.0	18	23	78.3	55.1	15	38	17	21
13	Celtics	18	4/4/2004	BOS	@	WAS	L 102-112	240	102	25	25	1	41	77	53.2	8	21	38.1	12	17	70.6	60.4	4	21	18	25
14	Celtics	18	1/25/2004	BOS	@	NJN	L 91-110	240	91	32	18	1	31	87	35.6	4	23	17.4	25	31	80.6	45.2	10	22	17	28
15	Celtics	18	3/15/2001	BOS	@	PHX	W 105-101	240	105	29	24	5	37	75	49.3	8	23	34.8	23	25	92.0	61.0	6	23	16	24
16	Celtics	18	1/22/1997	BOS	vs	PHI	L 125-127	265	125	49	26	6	48	115	41.7	9	21	42.9	20	30	66.7	48.8	27	22	16	25
17	Celtics	18	1/5/1997	BOS	vs	PHX	W 109-102	240	109	34	20	5	39	85	45.9	3	11	27.3	28	31	90.3	55.3	8	26	14	22
18	Celtics	18	11/18/1994	BOS	@	MIA	W 115-111	240	115	35	24	3	48	87	55.2	5	11	45.5	14	17	82.4	60.9	12	23	18	29
19	Celtics	18	2/26/1992	BOS	vs	IND	W 130-109	240	130	40	32	10	50	95	52.6	2	2	100.0	28	30	93.3	60.1	12	28	11	26
20	Celtics	18	12/19/1979	BOS	vs	PHI	W 112-89	240	112	38	30	3	45	88	51.1	3	7	42.9	19	23	82.6	57.1	9	29	20	22
21	Celtics	17	12/30/2020	BOS	vs	MEM	W 126-107	240	126	42	27	11	49	91	53.8	16	39	41.0	12	14	85.7	64.8	10	32	16	21
22	Celtics	17	1/10/2016	BOS	@	MEM	L 98-101	240	98	39	22	4	37	88	42.0	7	22	31.8	17	23	73.9	49.9	11	28	16	28
23	Celtics	17	12/8/2014	BOS	@	WAS	L 132-133	290	132	46	27	4	47	102	46.1	9	22	40.9	29	32	90.6	56.9	14	32	17	30
24	Celtics	17	12/8/2009	BOS	vs	MIL	W 98-89	240	98	35	24	1	35	67	52.2	6	18	33.3	22	31	71.0	60.8	5	30	16	23
25	Celtics	17	3/31/2004	BOS	vs	POR	L 98-105	240	98	30	23	3	39	86	45.3	9	26	34.6	11	14	78.6	53.2	14	16	14	15