what are the most rebounds in a game by a rookie guard under 20 years old

Josh Giddey has grabbed the most rebounds by a rookie guard younger than 20 in a game, with 18 rebounds against the Clippers on December 18, 2021.

Interpreted as:

What are the most rebounds in a regular-season game by a rookie guard under 20 years old?

	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	Josh Giddey J. Giddey	18	19-069	12/18/2021	OKC	vs	LAC	32	8	10	0	0	4	14	28.6	0	1	0.0	0	0		28.6	4	14	4	0	-7
2	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
3	Josh Giddey J. Giddey	15	19-087	1/5/2022	OKC	@	MIN	35	14	6	1	0	6	11	54.5	2	4	50.0	0	0		63.6	4	11	6	2	-11
4	RJ Barrett	15	19-136	10/28/2019	NYK	vs	CHI	40	19	5	0	1	7	15	46.7	0	2	0.0	5	11	45.5	47.9	6	9	2	3	+5
5	LaMelo Ball L. Ball	14	19-142	1/11/2021	CHA	vs	NYK	30	8	7	3	1	3	13	23.1	2	6	33.3	0	0		30.8	1	13	1	2	+4
6	Josh Giddey J. Giddey	13	19-084	1/2/2022	OKC	vs	DAL	36	17	14	4	0	7	16	43.8	3	5	60.0	0	0		53.1	1	12	3	1	+6
7	Kevin Durant K. Durant	13	19-200	4/16/2008	SEA	@	GSW	43	42	6	1	2	18	25	72.0	1	2	50.0	5	6	83.3	76.0	3	10	5	0	+14
8	Josh Giddey J. Giddey	12	19-125	2/12/2022	OKC	@	CHI	33	11	10	0	0	4	10	40.0	1	2	50.0	2	2	100.0	50.6	1	11	3	0	-3
9	Josh Giddey J. Giddey	12	19-113	1/31/2022	OKC	vs	POR	33	14	4	0	1	5	12	41.7	0	2	0.0	4	4	100.0	50.9	1	11	4	2	+15
10	Josh Giddey J. Giddey	12	19-040	11/19/2021	OKC	@	MIL	32	14	4	0	0	6	12	50.0	0	3	0.0	2	4	50.0	50.9	6	6	2	0	-16
11	Josh Giddey J. Giddey	12	19-031	11/10/2021	OKC	@	NOP	31	7	9	1	0	3	10	30.0	1	3	33.3	0	0		35.0	5	7	5	3	+3
12	LaMelo Ball L. Ball	12	19-262	5/11/2021	CHA	vs	DEN	31	5	7	0	0	1	9	11.1	0	3	0.0	3	4	75.0	23.2	1	11	5	2	-1
13	LaMelo Ball L. Ball	12	19-176	2/14/2021	CHA	vs	SAS	39	17	8	3	1	7	20	35.0	3	8	37.5	0	0		42.5	3	9	5	4	-16
14	LaMelo Ball L. Ball	12	19-140	1/9/2021	CHA	vs	ATL	31	22	11	1	0	9	13	69.2	3	5	60.0	1	2	50.0	79.3	3	9	1	4	+18
15	Luka Dončić L. Dončić	12	19-350	2/13/2019	DAL	vs	MIA	33	18	9	0	0	5	17	29.4	3	9	33.3	5	7	71.4	44.8	5	7	6	1	-12
16	Luka Dončić L. Dončić	12	19-333	1/27/2019	DAL	vs	TOR	36	35	10	0	0	14	24	58.3	3	9	33.3	4	6	66.7	65.7	2	10	3	3	-2
17	Bradley Beal B. Beal	12	19-239	2/22/2013	WAS	vs	DEN	38	17	4	2	2	3	8	37.5	2	5	40.0	9	11	81.8	66.2	3	9	3	3	+12
18	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
19	Bub Carrington B. Carrington	11	19-246	3/24/2025	WAS	vs	TOR	31	15	6	2	0	6	15	40.0	1	6	16.7	2	3	66.7	46.0	2	9	3	4	+5
20	Josh Giddey J. Giddey	11	19-127	2/14/2022	OKC	@	NYK	39	28	12	1	0	11	22	50.0	3	4	75.0	3	6	50.0	56.8	2	9	7	1	+6
21	Josh Giddey J. Giddey	11	19-120	2/7/2022	OKC	vs	GSW	30	16	7	1	0	6	16	37.5	0	3	0.0	4	4	100.0	45.0	3	8	4	3	-2
22	Josh Giddey J. Giddey	11	19-101	1/19/2022	OKC	@	SAS	33	9	8	0	0	4	16	25.0	0	5	0.0	1	2	50.0	26.7	5	6	4	0	-12
23	Josh Giddey J. Giddey	11	19-038	11/17/2021	OKC	vs	HOU	34	14	2	0	1	7	14	50.0	0	2	0.0	0	0		50.0	1	10	3	3	+1
24	LaMelo Ball L. Ball	11	19-174	2/12/2021	CHA	vs	MIN	37	20	4	3	0	8	15	53.3	2	8	25.0	2	2	100.0	63.0	2	9	4	5	+15
25	Luka Dončić L. Dončić	11	19-339	2/2/2019	DAL	@	CLE	33	35	6	1	0	13	25	52.0	4	11	36.4	5	7	71.4	62.3	1	10	2	4	+8