Tracy McGrady has the most career rebounds by a player younger than 19, with 269 rebounds.

Interpreted as:

most rebounds before turning 19 years old by a player

	NAME	REB	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	AST	STL	BLK	TOV	PF	+/-
1	Tracy McGrady T. McGrady	269	64	18.4	7.0	4.2	1.5	0.8	1.0	2.8	6.2	45.0	0.2	0.6	34.1	1.2	1.7	71.2	50.5	1.6	2.6	1.0	1,179	451	98	49	61	66	86	-229
2	LeBron James L. James	184	31	40.2	20.2	5.9	6.1	1.6	0.7	7.6	17.9	42.6	1.0	3.3	31.1	3.8	5.0	77.3	50.1	1.5	4.5	3.9	1,247	625	188	49	23	121	56	-67
3	Dwight Howard D. Howard	177	17	32.0	10.5	10.4	1.6	1.0	1.9	3.8	6.9	54.7	0.0	0.0		3.0	5.1	58.6	57.6	3.8	6.6	2.2	544	179	27	17	32	38	40	+19
4	Kobe Bryant K. Bryant	132	71	15.5	7.6	1.9	1.3	0.7	0.3	2.5	5.9	41.7	0.7	1.9	37.5	1.9	2.3	81.9	54.4	0.7	1.2	1.6	1,103	539	91	49	23	112	102	+60
5	Jermaine O'Neal J. O'Neal	124	45	10.2	4.1	2.8	0.2	0.0	0.6	1.5	3.4	45.1	0.0	0.0	0.0	1.0	1.7	60.3	49.4	0.9	1.9	0.6	458	185	8	2	26	27	46	+26
6	Jalen Duren J. Duren	96	13	21.4	6.3	7.4	0.3	0.3	1.2	2.7	4.8	55.6	0.0	0.1	0.0	0.9	2.4	38.7	53.5	2.9	4.5	1.1	279	82	4	4	15	14	27	-69
7	Andrew Bynum A. Bynum	80	46	7.4	1.6	1.7	0.2	0.1	0.5	0.7	1.8	40.2	0.0	0.0		0.2	0.6	29.6	39.4	0.7	1.0	0.4	338	74	9	4	22	17	56	-47
8	Andris Biedrins A. Biedrins	63	20	11.9	3.7	3.2	0.3	0.5	0.8	1.6	2.6	59.6	0.0	0.1	0.0	0.6	1.3	42.3	57.5	1.2	2.0	0.4	237	73	6	9	15	7	49	+4
9	Darko Milicic D. Milicic	43	34	4.7	1.4	1.3	0.2	0.2	0.4	0.5	1.9	26.2	0.0	0.0	0.0	0.4	0.7	58.3	31.8	0.3	0.9	0.4	159	48	7	7	15	13	33	-45
10	Giannis Antetokounmpo G. Antetokounmpo	42	13	16.2	5.2	3.2	0.9	0.5	0.7	2.1	4.1	50.9	0.5	1.2	40.0	0.6	1.2	50.0	56.6	0.7	2.5	1.0	210	68	12	7	9	13	23	+3
11	Josh Smith J. Smith	34	13	12.7	5.1	2.6	0.8	0.3	0.7	1.9	3.9	49.0	0.0	0.2	0.0	1.2	1.9	64.0	53.2	1.0	1.6	1.2	165	66	11	4	9	16	18	-8
12	Cooper Flagg C. Flagg	31	5	32.3	13.4	6.2	2.8	0.8	0.6	5.0	12.2	41.0	0.8	3.0	26.7	2.6	2.6	100.0	50.2	0.6	5.6	2.0	161	67	14	4	3	10	13	-57
13	Eddy Curry E. Curry	29	13	12.4	4.4	2.2	0.3	0.2	0.8	1.5	3.6	40.4	0.0	0.0		1.5	2.4	61.3	47.0	0.6	1.6	0.9	161	57	4	2	11	12	23	-44
14	CJ Miles	25	17	7.9	2.4	1.5	0.5	0.2	0.0	0.8	2.9	28.6	0.2	0.8	21.4	0.6	0.8	76.9	37.5	0.6	0.8	0.4	134	41	9	4	0	6	15	+16
15	Yaroslav Korolev Y. Korolev	13	24	5.3	1.1	0.5	0.4	0.1	0.0	0.4	1.3	30.0	0.1	0.3	28.6	0.3	0.4	70.0	39.2	0.2	0.3	0.3	127	27	9	3	0	6	11	-8
16	Dragan Bender D. Bender	9	9	9.4	3.3	1.0	0.4	0.2	0.3	1.3	3.1	42.9	0.7	1.7	40.0	0.0	0.0		53.6	0.3	0.7	0.3	85	30	4	2	3	3	12	+16
17	Jonathan Bender J. Bender	7	9	4.4	2.2	0.8	0.0	0.0	0.3	0.9	2.3	38.1	0.2	0.6	40.0	0.2	0.4	50.0	43.9	0.0	0.8	0.4	40	20	0	0	3	4	5	-5
18	Joshua Primo J. Primo	6	8	7.4	2.0	0.8	0.5	0.4	0.5	0.8	1.4	54.5	0.5	1.0	50.0	0.0	0.0		72.7	0.1	0.6	0.0	59	16	4	3	4	0	4	+7
19	Martell Webster M. Webster	6	9	9.2	4.0	0.7	0.1	0.1	0.0	1.6	3.6	43.8	0.9	2.0	44.4	0.0	0.0		56.3	0.1	0.6	1.0	83	36	1	1	0	9	8	-29
20	Joan Beringer J. Beringer	4	2	3.5	1.0	2.0	0.0	0.0	0.0	0.5	0.5	100.0	0.0	0.0		0.0	0.0		100.0	0.5	1.5	0.0	7	2	0	0	0	0	1	+5
21	Ulrich Chomche U. Chomche	4	3	4.5	0.7	1.3	0.3	0.0	0.0	0.3	0.7	50.0	0.0	0.0		0.0	0.0		50.0	0.7	0.7	0.7	14	2	1	0	0	2	2	-1
22	Amir Johnson A. Johnson	4	3	12.9	6.7	1.3	1.0	0.0	0.7	2.3	3.3	70.0	0.7	1.0	66.7	1.3	1.3	100.0	85.0	1.0	0.3	1.3	39	20	3	0	2	4	7	-22
23	GG Jackson	3	3	2.2	0.0	1.0	0.0	0.3	0.0	0.0	1.3	0.0	0.0	0.7	0.0	0.0	0.0		0.0	0.3	0.7	0.3	7	0	0	1	0	1	0	-1
24	Sekou Doumboya S. Doumboya	3	5	4.2	1.6	0.6	0.0	0.2	0.0	0.8	2.2	36.4	0.0	0.6	0.0	0.0	0.2	0.0	35.0	0.0	0.6	0.2	21	8	0	1	0	1	3	+8
25	Devin Booker D. Booker	3	1	21.3	14.0	3.0	0.0	1.0	0.0	6.0	7.0	85.7	1.0	2.0	50.0	1.0	3.0	33.3	84.1	0.0	3.0	0.0	21	14	0	1	0	0	2	+4