Dwight Howard has the most rebounds by an 18-year-old player in a game, with 20 boards versus the Raptors on December 1, 2004.

Interpreted as:

most reb by a player age 18 in one regular-season game

	NAME	REB	AGE	DATE	TM		OPP	MIN	PTS	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Dwight Howard D. Howard	20	18-359	12/1/2004	ORL	vs	TOR	38	15	3	2	2	4	6	66.7	0	0		7	9	77.8	75.3	6	14	1	2	+33
2	Bill Willoughby B. Willoughby	18	18-326	4/10/1976	ATL	vs	PHI	42	20	4	2	3	7	14	50.0				6	11	54.5	53.1				2
3	LeBron James L. James	16	18-334	11/29/2003	CLE	vs	MEM	55	33	7	1	1	14	28	50.0	3	6	50.0	2	3	66.7	56.3	2	14	8	1	-10
4	Dwight Howard D. Howard	15	18-340	11/12/2004	ORL	vs	LAL	35	5	0	0	1	2	5	40.0	0	0		1	2	50.0	42.5	6	9	2	3	+4
5	Tracy McGrady T. McGrady	15	18-321	4/10/1998	TOR	vs	MIA	33	12	5	3	2	5	7	71.4	0	1	0.0	2	2	100.0	76.1	5	10	4	4	-3
6	Dwight Howard D. Howard	14	18-342	11/14/2004	ORL	@	PHI	29	9	0	0	4	3	6	50.0	0	0		3	6	50.0	52.1	5	9	2	2	-2
7	Tracy McGrady T. McGrady	13	18-316	4/5/1998	TOR	@	PHI	32	14	3	1	2	7	16	43.8	0	1	0.0	0	0		43.8	5	8	0	3	0
8	Jalen Duren J. Duren	12	18-359	11/12/2022	DET	vs	BOS	17	2	1	2	0	1	1	100.0	0	0		0	0		100.0	1	11	1	2	-9
9	Dwight Howard D. Howard	12	18-334	11/6/2004	ORL	@	CHA	23	5	1	0	3	2	5	40.0	0	0		1	2	50.0	42.5	4	8	3	4	-8
10	LeBron James L. James	12	18-304	10/30/2003	CLE	@	PHX	41	21	8	1	0	8	17	47.1	1	5	20.0	4	7	57.1	52.3	2	10	7	1	-3
11	Bill Willoughby B. Willoughby	12	18-327	4/11/1976	ATL	vs	HOU	39	8	1			4	14	28.6				0	0		28.6				2
12	Bill Willoughby B. Willoughby	12	18-321	4/5/1976	ATL	vs	WAS	43	14	0			6	15	40.0				2	2	100.0	44.1				3
13	Bill Willoughby B. Willoughby	12	18-212	12/18/1975	ATL	vs	LAL	24	13	1	0		6	8	75.0				1	2	50.0	73.2				0
14	Dwight Howard D. Howard	11	18-348	11/20/2004	ORL	@	IND	30	5	1	1	4	2	3	66.7	0	0		1	2	50.0	64.4	3	8	2	2	+7
15	Dwight Howard D. Howard	11	18-337	11/9/2004	ORL	vs	DAL	27	15	2	1	1	6	9	66.7	0	0		3	5	60.0	67.0	3	8	2	4	+24
16	LeBron James L. James	11	18-310	11/5/2003	CLE	vs	DEN	41	7	7	2	3	3	11	27.3	0	2	0.0	1	1	100.0	30.6	2	9	2	1	-3
17	Tracy McGrady T. McGrady	11	18-175	11/15/1997	TOR	vs	IND	23	10	2	0	0	5	11	45.5	0	0		0	0		45.5	7	4	2	3	-15
18	Bill Willoughby B. Willoughby	11	18-263	2/7/1976	ATL	vs	WAS	16	8	0			2	5	40.0				4	5	80.0	55.6				3
19	Jalen Duren J. Duren	10	18-356	11/9/2022	DET	@	BOS	30	10	2	1	1	5	8	62.5	0	0		0	0		62.5	5	5	0	1	-10
20	Jalen Duren J. Duren	10	18-337	10/21/2022	DET	@	NYK	23	8	0	1	0	4	8	50.0	0	1	0.0	0	1	0.0	47.4	3	7	1	4	-12
21	Jalen Duren J. Duren	10	18-335	10/19/2022	DET	vs	ORL	22	14	1	0	3	7	13	53.8	0	0		0	4	0.0	47.4	5	5	3	0	+7
22	Andris Biedrins A. Biedrins	10	18-352	3/20/2005	GSW	@	SAC	27	12	0	1	1	5	5	100.0	0	0		2	5	40.0	83.3	3	7	1	5	+4
23	Andris Biedrins A. Biedrins	10	18-343	3/11/2005	GSW	@	IND	22	8	1	1	1	3	3	100.0	0	0		2	4	50.0	84.0	3	7	2	2	-4
24	Dwight Howard D. Howard	10	18-364	12/6/2004	ORL	@	DEN	42	23	4	4	0	7	12	58.3	0	0		9	15	60.0	61.8	4	6	4	0	-4
25	Dwight Howard D. Howard	10	18-357	11/29/2004	ORL	vs	BOS	33	10	2	1	2	5	12	41.7	0	0		0	0		41.7	6	4	1	2	-19