Who has the most offensive rebounds in a game?

Moses Malone sets an NBA single-game record with 21 offensive rebounds (which were tracked beginning in 1973-74).

Interpreted as:

Who has the most offensive rebounds in a regular season game?

	NAME	DATE	TM	OPP	OREB	MIN	PTS	+/-	REB	AST	STL	BLK	3PM	FG%	FT%	TOV	FGM	FGA	3PA	3P%	FTM	FTA	PF
1	Moses Malone	2/11/1982	HOU	vs. SEA	21	44	38		32	2	3	0	0	48.6	57.1	4	17	35	0		4	7	3
2	Moses Malone	2/9/1979	HOU	@ NOJ	19	44	33		37	2	1	2		50.0	69.2		12	24			9	13	3
3	Zaza Pachulia	3/20/2015	MIL	@ BKN	18	40	22	6	21	7	1	0	0	56.3	100.0	3	9	16	0		4	4	4
4	Dennis Rodman	3/4/1992	DET	vs. IND	18	45	10		34	3	2	0	0	26.7	50.0	2	4	15	1	0.0	2	4	5
5	Charles Oakley	3/15/1986	CHI	vs. MIL	18	44	35		26	7	3	1	0	51.9	77.8	4	14	27	0		7	9	3
6	Jayson Williams	10/31/1997	NJN	vs. IND	17	40	18	1	20	1	3	2	0	44.4	33.3	3	8	18	0		2	6	2
7	Andray Blatche	4/1/2011	WAS	vs. CLE	16	40	36	7	19	4	1	1	0	46.9	66.7	4	15	32	0		6	9	3
8	Kevin Willis	2/19/1992	ATL	vs. WAS	16	45	20		33	1	2	4	0	37.0	0.0	3	10	27	0		0	2	3
9	Terry Cummings	2/28/1990	SAS	@ GSW	16	39	28		24	1	2	1	0	38.7	80.0	4	12	31	0		4	5	5
10	Charles Oakley	4/22/1988	CHI	vs. CLE	16	41	26		35	3	1	0	0	62.5	100.0	6	10	16	1	0.0	6	6	2
11	Charles Barkley	3/20/1987	PHI	vs. DEN	16	41	26		25	9	3	2	0	62.5	85.7	4	10	16	1	0.0	6	7	2
12	Charles Barkley	3/4/1987	PHI	vs. NYK	16	48	28		21	6	2	0	0	45.8	60.0	7	11	24	2	0.0	6	10	5
13	Larry Smith	3/23/1986	GSW	vs. DEN	16	32	6		23	2	2	1	0	21.4	0.0	2	3	14	0		0	2	2
14	Moses Malone	10/17/1979	HOU	vs. IND	16	40	44		29	0		2	0	72.7	85.7	8	16	22	0		12	14	3
15	Moses Malone	11/16/1977	HOU	vs. BUF	16	42	36		29	2					76.9		13				10	13
16	Andre Drummond	3/11/2015	DET	@ GSW	15	34	22	-8	25	0	2	2	0	47.8	0.0	3	11	23	0		0	2	3
17	J.J. Hickson	2/25/2014	DEN	vs. POR	15	30	16	6	25	1	1	1	0	37.5	66.7	4	6	16	0		4	6	4
18	Dennis Rodman	12/23/1997	CHI	vs. LAC	15	42	9	5	25	4	0	1	0	50.0	50.0	2	4	8	0		1	2	4
19	Jayson Williams	1/9/1997	NJN	vs. MIN	15	38	18	5	23	1	2	1	0	42.9	54.5	2	6	14	0		6	11	1
20	Larry Smith	2/16/1991	HOU	vs. PHX	15	37	12		25	2	2	0	0	54.5		2	6	11	0		0	0	3
21	Hakeem Olajuwon	2/14/1985	HOU	@ NYK	15	44	30		25	0	3	3	0	50.0	55.6	4	10	20	0		10	18	5
22	Moses Malone	3/25/1984	PHI	vs. BOS	15	46	32		27	1	0	1	0	44.0	83.3	7	11	25	0		10	12	3
23	Moses Malone	12/15/1981	HOU	vs. PHX	15	44	35		21	0	2	3	0	54.2	81.8	6	13	24	0		9	11	3
24	Moses Malone	4/7/1979	HOU	vs. SAS	15	39	29		26	0	2	3		50.0	100.0		11	22			7	7	3
25	Mark Landsberger	11/10/1978	CHI	@ DET	15	46	20		23	2				38.5			10	26			0	0	0