John Gianelli got his most boards in a game versus the Spurs on October 23, 1976, with 21 rebounds.

Interpreted as:

John Gianelli most rebounds in a regular-season game

	NAME	REB	DATE	TM		OPP	MIN	PTS	AST	STL	BLK	FGM	FGA	FG%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	John Gianelli J. Gianelli	21	10/23/1976	NYK	vs	SAS	43	14	2	3	5	7	10	70.0	0	0		70.0				2
2	John Gianelli J. Gianelli	18	11/6/1975	NYK	@	GSW	42	18	4	0	0	8	18	44.4	2	2	100.0	47.7	8	10		2
3	John Gianelli J. Gianelli	18	10/17/1974	NYK	vs	NOJ	45	11	2	2	1	3	11	27.3	5	7	71.4	39.1	4	14		3
4	John Gianelli J. Gianelli	16	12/5/1975	NYK	@	PHI	42	8	2			3	14	21.4	2	2	100.0	26.9				0
5	John Gianelli J. Gianelli	15	1/5/1978	MIL	vs	NOJ	39	19	3	2	5	9	19	47.4	1	1	100.0	48.9				3
6	John Gianelli J. Gianelli	15	3/8/1975	NYK	vs	DET	40	20	3			8	17	47.1	4	5	80.0	52.1				2
7	John Gianelli J. Gianelli	15	11/16/1974	NYK	vs	SEA	33	8	4			4	5	80.0	0	0		80.0				1
8	John Gianelli J. Gianelli	14	10/24/1978	MIL	@	PHX	40	9	5	1	0	4	8	50.0	1	3	33.3	48.3	5	9	2	3
9	John Gianelli J. Gianelli	14	1/29/1978	MIL	@	SEA	41	10	6	1	2	5	9	55.6	0	2	0.0	50.6	7	7	2	4
10	John Gianelli J. Gianelli	14	1/3/1977	BUF	@	SAS	35	16	0	1	1	8	13	61.5	0	0		61.5				3
11	John Gianelli J. Gianelli	14	10/26/1976	NYK	vs	BUF	38	12	1			5	7	71.4	2	2	100.0	76.1				4
12	John Gianelli J. Gianelli	14	1/24/1975	NYK	@	BUF	44	15	4			6	16	37.5	3	3	100.0	43.3				3
13	John Gianelli J. Gianelli	13	3/17/1978	MIL	@	BUF	30	10	2	0	1	3	7	42.9	4	5	80.0	54.3			3	6
14	John Gianelli J. Gianelli	13	2/24/1978	MIL	@	CHI	34	4	6	0	0	1	3	33.3	2	3	66.7	46.3	2	11	1	2
15	John Gianelli J. Gianelli	13	2/10/1978	MIL	vs	CLE	44	6	5	0	4	3	7	42.9	0	0		42.9	4	9	2	3
16	John Gianelli J. Gianelli	13	2/8/1978	MIL	vs	BUF	41	7	6	0	1	3	7	42.9	1	3	33.3	42.1			1	3
17	John Gianelli J. Gianelli	13	1/22/1977	BUF	@	KCK	39	11	0	2	2	5	10	50.0	1	2	50.0	50.6				2
18	John Gianelli J. Gianelli	13	11/20/1976	NYK	vs	DEN	32	19	0	0	1	8	15	53.3	3	5	60.0	55.2	7	6		4
19	John Gianelli J. Gianelli	13	3/20/1976	NYK	@	WAS	42	17	3			7	15	46.7	3	6	50.0	48.2				3
20	John Gianelli J. Gianelli	13	3/17/1976	NYK	@	NOJ	44	24	2			10	20	50.0	4	5	80.0	54.1				3
21	John Gianelli J. Gianelli	13	2/17/1976	NYK	vs	GSW	34	8	0	0	1	4	10	40.0	0	0		40.0	3	10		5
22	John Gianelli J. Gianelli	13	3/13/1975	NYK	vs	POR	40	12	5	0	3	5	13	38.5	2	4	50.0	40.7	5	8		3
23	John Gianelli J. Gianelli	13	3/1/1975	NYK	vs	PHI	42	14	3			6	15	40.0	2	2	100.0	44.1				2
24	John Gianelli J. Gianelli	13	2/22/1975	NYK	vs	BUF	40	19	1			7	11	63.6	5	7	71.4	67.5				4
25	John Gianelli J. Gianelli	13	1/7/1975	NYK	@	POR	36	11	4	1	2	4	9	44.4	3	4	75.0	51.1	6	7		5