Larry Bird had his most rebounds in a game 4 times, with 21 boards.

Interpreted as:

Larry Bird most rebounds in a regular-season game

	NAME	REB	DATE	TM		OPP	MIN	PTS	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Larry Bird L. Bird	21	3/16/1982	BOS	@	WAS	45	31	2			10	20	50.0	0	0		11	14	78.6	59.3	5	16		2
2	Larry Bird L. Bird	21	12/29/1981	BOS	@	DEN	37	27	6	1	1	12	21	57.1	1	2	50.0	2	4	50.0	59.3	7	14	6	1
3	Larry Bird L. Bird	21	2/11/1981	BOS	@	LAL	47	36	6	5	3	16	25	64.0	0	0		4	5	80.0	66.2	5	16	3	3
4	Larry Bird L. Bird	21	11/1/1980	BOS	@	PHI	49	36	4	2	0	14	29	48.3	1	2	50.0	7	8	87.5	55.4	8	13	2	4
5	Larry Bird L. Bird	20	11/11/1987	BOS	vs	IND	42	42	5	3	2	15	24	62.5	2	2	100.0	10	10	100.0	73.9	4	16	2	3
6	Larry Bird L. Bird	20	4/13/1984	BOS	@	DET	43	29	6	2	3	13	32	40.6	0	3	0.0	3	3	100.0	43.5	4	16	3	4
7	Larry Bird L. Bird	20	2/4/1983	BOS	@	IND	39	23	4	2		9	20	45.0	0	2	0.0	5	6	83.3	50.8	6	14		2
8	Larry Bird L. Bird	20	12/25/1980	BOS	@	NYK	47	28	8			13	24	54.2	0	1	0.0	2	3	66.7	55.3	3	17		2
9	Larry Bird L. Bird	20	12/20/1980	BOS	@	CLE	45	21	4	2	0	9	20	45.0	1	3	33.3	2	2	100.0	50.3	6	14	4	2
10	Larry Bird L. Bird	20	12/13/1980	BOS	@	CHI	42	35	5	3	0	15	28	53.6	0	2	0.0	5	8	62.5	55.5	2	18	2	4
11	Larry Bird L. Bird	19	12/28/1991	BOS	@	DEN	43	13	6	0	1	4	18	22.2	1	4	25.0	4	4	100.0	32.9	3	16	4	1
12	Larry Bird L. Bird	19	11/20/1991	BOS	vs	IND	41	26	3	0	1	10	20	50.0	0	2	0.0	6	6	100.0	57.4	1	18	3	2
13	Larry Bird L. Bird	19	3/5/1985	BOS	@	NYK	46	20	10	2	3	7	16	43.8	0	1	0.0	6	9	66.7	50.1	4	15	4	4
14	Larry Bird L. Bird	19	2/5/1984	BOS	vs	DET	47	28	5	2	0	12	30	40.0	1	2	50.0	3	3	100.0	44.7	8	11	3	2
15	Larry Bird L. Bird	19	1/13/1984	BOS	@	PHI	39	29	8	2	0	13	25	52.0	0	1	0.0	3	5	60.0	53.3	7	12	4	4
16	Larry Bird L. Bird	19	12/12/1982	BOS	vs	DEN	43	36	3	6	3	15	33	45.5	0	0		6	7	85.7	49.9	7	12	3	2
17	Larry Bird L. Bird	19	11/6/1982	BOS	@	PHI	50	21	7	2	0	10	23	43.5	1	2	50.0	0	0		45.7	7	12	2	5
18	Larry Bird L. Bird	19	1/13/1982	BOS	vs	ATL	46	28	15	3	3	12	19	63.2	0	0		4	5	80.0	66.0				3
19	Larry Bird L. Bird	19	11/14/1979	BOS	vs	DET	36	23	10	3	2	8	19	42.1	1	3	33.3	6	6	100.0	53.1	9	10	7	1
20	Larry Bird L. Bird	18	3/18/1990	BOS	vs	NJN	36	29	11	1	0	8	15	53.3	0	2	0.0	13	13	100.0	70.0	1	17	5	0
21	Larry Bird L. Bird	18	2/25/1986	BOS	@	NYK	40	24	13	1	0	9	14	64.3	1	2	50.0	5	5	100.0	74.1	1	17	3	2
22	Larry Bird L. Bird	18	2/16/1986	BOS	@	LAL	43	22	7	0	0	7	17	41.2	0	1	0.0	8	12	66.7	49.4	4	14	2	4
23	Larry Bird L. Bird	18	2/19/1984	BOS	@	POR	46	34	9	3	1	14	20	70.0	2	2	100.0	4	4	100.0	78.1	3	15	4	4
24	Larry Bird L. Bird	18	12/15/1982	BOS	@	DET	40	23	3	1	0	8	23	34.8	0	0		7	9	77.8	42.7	2	16	3	5
25	Larry Bird L. Bird	18	2/25/1981	BOS	vs	CLE	37	30	5	2	1	9	19	47.4	0	0		12	13	92.3	60.7	4	14	5	3