Dwight Howard has gotten the most career rebounds per game by a player younger than 20, with 10.6 per game.

Interpreted as:

most rpg by a player before turning 20 years old

	NAME	RPG	GP	MPG	PPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Dwight Howard D. Howard	10.6	100	33.3	12.4	1.0	0.9	1.6	4.5	8.8	51.1	0.0	0.0	0.0	3.5	5.3	65.2	55.9	3.5	7.1	2.0	3,327	1,243	1,061	100	94	163	203	297	-216
2	Karl-Anthony Towns K. Towns	10.3	9	28.9	15.7	1.1	0.4	2.3	6.3	12.9	49.1	0.1	0.4	25.0	2.9	3.2	89.7	54.8	2.4	7.9	1.9	260	141	93	10	4	21	17	27	0
3	Victor Wembanyama V. Wembanyama	10.2	29	29.4	18.9	2.9	1.2	3.1	7.0	15.8	44.4	1.4	4.9	29.4	3.4	4.3	78.4	53.3	2.1	8.0	3.2	853	548	295	84	35	91	92	64	-188
4	Lamar Odom L. Odom	9.3	3	43.0	23.7	2.7	1.7	1.7	6.3	14.7	43.2	1.3	3.7	36.4	9.7	12.7	76.3	58.5	2.3	7.0	3.3	129	71	28	8	5	5	10	10	-16
5	Jalen Duren J. Duren	9.1	75	25.3	9.5	1.3	0.7	0.9	4.1	6.3	64.4	0.0	0.0	0.0	1.4	2.3	62.1	65.3	3.4	5.6	1.5	1,901	713	680	100	49	68	114	210	-321
6	Lonzo Ball L. Ball	9.0	4	35.7	11.5	9.0	1.0	0.5	4.5	14.3	31.6	1.3	5.5	22.7	1.3	2.3	55.6	37.7	1.0	8.0	3.0	143	46	36	36	4	2	12	9	-24
7	Paolo Banchero P. Banchero	8.3	11	34.7	23.5	3.6	0.7	0.9	8.1	17.5	46.1	1.0	3.9	25.6	6.4	8.3	76.9	55.6	0.8	7.5	3.0	381	259	91	40	8	10	33	26	-26
8	Jahlil Okafor J. Okafor	8.1	24	32.6	17.8	1.3	0.3	1.5	7.4	16.3	45.5	0.0	0.1	0.0	2.9	4.0	72.2	49.1	2.5	5.6	2.7	783	426	195	30	7	35	65	64	-274
9	Dereck Lively II D. Lively II	7.9	36	26.0	9.2	1.3	0.6	1.4	4.2	5.6	73.9	0.0	0.1	0.0	0.9	1.6	54.4	72.6	2.9	5.0	1.2	935	331	284	47	23	50	42	111	+110
10	Anthony Davis A. Davis	7.8	49	28.0	12.9	0.9	1.1	1.8	5.2	10.3	50.8	0.0	0.1	0.0	2.4	3.3	72.5	54.6	2.4	5.4	1.4	1,372	630	384	45	54	87	69	112	-108
11	Josh Giddey J. Giddey	7.8	54	31.5	12.5	6.4	0.9	0.4	5.2	12.4	41.9	1.0	3.9	26.3	1.0	1.5	70.9	47.8	1.8	6.0	3.2	1,700	674	421	345	51	20	171	88	-299
12	Andre Drummond A. Drummond	7.6	60	20.7	7.9	0.5	1.0	1.6	3.5	5.7	60.8	0.0	0.0	50.0	1.0	2.7	37.1	57.8	2.8	4.8	1.0	1,243	476	457	30	59	95	57	144	-51
13	Amar'e Stoudemire A. Stoudemire	7.4	8	24.8	8.4	0.6	0.4	2.0	3.1	8.6	36.2	0.1	0.1	100.0	2.0	3.0	66.7	42.1	2.6	4.8	1.4	198	67	59	5	3	16	11	20	-14
14	Chris Bosh C. Bosh	7.3	63	32.9	11.2	1.0	0.7	1.4	4.2	9.3	45.7	0.0	0.1	37.5	2.7	3.9	68.4	50.9	2.6	4.7	1.4	2,074	704	461	65	46	86	86	176	-139
15	Luka Dončić L. Dončić	7.3	57	32.2	20.9	5.7	1.0	0.3	6.9	15.9	43.4	2.5	7.0	35.3	4.7	6.5	72.6	56.0	1.1	6.2	3.4	1,837	1,194	415	324	57	16	194	107	-16
16	Jabari Smith Jr. J. Smith Jr.	7.2	79	31.0	12.8	1.3	0.5	0.9	4.6	11.3	40.8	1.5	4.9	30.7	2.1	2.6	78.6	51.4	1.5	5.7	1.3	2,450	1,010	569	101	43	74	104	227	-555
17	Marvin Bagley III M. Bagley III	7.2	47	24.8	13.9	1.0	0.6	1.0	5.3	10.4	50.9	0.3	1.3	25.8	2.9	4.2	69.7	56.6	2.5	4.7	1.6	1,165	652	338	47	27	47	76	96	-59
18	Wendell Carter Jr. W. Carter Jr.	7.0	44	25.2	10.3	1.8	0.6	1.3	4.1	8.4	48.5	0.1	0.7	18.8	2.0	2.5	79.5	54.1	2.0	5.0	1.5	1,110	455	307	78	26	58	65	152	-292
19	Zion Williamson Z. Williamson	6.8	19	29.7	23.6	2.2	0.8	0.5	9.1	15.4	58.9	0.3	0.7	46.2	5.2	8.0	64.5	62.4	2.9	3.9	2.7	565	448	129	41	16	9	51	32	+120
20	Isaiah Stewart I. Stewart	6.7	68	21.4	7.9	0.9	0.6	1.3	3.3	6.0	55.3	0.3	0.9	33.3	0.9	1.4	69.6	59.7	2.3	4.3	1.0	1,455	537	453	59	39	86	67	184	-60
21	Alex Sarr A. Sarr	6.5	67	27.1	13.0	2.4	0.7	1.5	4.9	12.4	39.4	1.6	5.1	30.8	1.7	2.5	67.9	48.2	1.9	4.6	1.7	1,814	869	435	161	44	101	114	146	-547
22	Kevin Garnett K. Garnett	6.3	80	28.7	10.4	1.8	1.1	1.6	4.5	9.2	49.1	0.1	0.4	28.6	1.3	1.9	70.5	52.2	2.2	4.1	1.4	2,293	835	501	145	86	131	110	189
23	Carmelo Anthony C. Anthony	6.1	82	36.5	21.0	2.8	1.2	0.5	7.6	17.9	42.6	0.8	2.6	32.2	5.0	6.4	77.7	50.9	2.2	3.8	3.0	2,995	1,725	498	227	97	41	247	225	+65
24	LaMelo Ball L. Ball	5.9	51	28.8	15.7	6.1	1.6	0.4	5.7	13.2	43.6	1.8	5.1	35.2	2.5	3.2	75.8	53.9	1.2	4.7	2.8	1,468	803	302	313	81	18	145	136	-84
25	James Wiseman J. Wiseman	5.9	33	21.6	11.8	0.6	0.3	1.0	5.0	9.5	52.2	0.3	1.0	33.3	1.5	2.5	63.0	55.8	1.4	4.5	1.5	713	390	195	20	10	34	51	109	-145