Before 1974-75, Wilt Chamberlain grabbed the most boards, with 23,924 rebounds.

Interpreted as:

NBA most career rebounds by a player before 1974-75

	NAME	REB	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	OREB	DREB	MIN	PTS	AST	STL	BLK	PF
1	Wilt Chamberlain W. Chamberlain	23,924	1,045	45.8	30.1	22.9	4.4			12.1	22.5	54.0	5.8	11.4	51.1	54.7			47,859	31,419	4,643			2,075
2	Bill Russell B. Russell	21,620	963	42.3	15.1	22.5	4.3			5.9	13.4	44.0	3.3	5.8	56.1	47.1			40,726	14,522	4,100			2,592
3	Walt Bellamy W. Bellamy	14,236	1,042	37.4	20.1	13.7	2.4	0.7	0.6	7.6	14.7	51.6	4.9	7.8	63.2	55.4	3.4	6.2	38,926	20,935	2,544	52	48	3,534
4	Jerry Lucas J. Lucas	12,942	829	38.8	17.0	15.6	3.3	0.4	0.3	6.9	13.8	49.9	3.2	4.1	78.3	54.4	0.8	4.3	32,131	14,053	2,730	28	24	2,389
5	Bob Pettit B. Pettit	12,849	792	38.8	26.4	16.2	3.0			9.3	21.3	43.6	7.8	10.3	76.1	51.1			30,690	20,880	2,369			2,529
6	Nate Thurmond N. Thurmond	12,771	757	40.6	17.4	16.9	2.7	0.7	2.9	6.6	15.6	42.5	4.1	6.1	67.6	47.5	4.0	10.1	30,735	13,191	2,070	41	179	2,065
7	Elgin Baylor E. Baylor	11,463	846	40.0	27.4	13.5	4.3			10.3	23.8	43.1	6.8	8.7	78.0	49.4			33,863	23,149	3,650			2,596
8	Dolph Schayes D. Schayes	11,256	932	34.4	18.6	12.1	3.0			5.9	15.6	38.0	6.8	8.0	85.4	48.8			29,800	17,366	2,813			3,207
9	Bill Bridges B. Bridges	10,920	894	34.1	12.2	12.2	2.8	0.9	0.5	4.6	10.5	44.2	2.9	4.2	69.5	49.5	3.0	4.7	30,463	10,925	2,522	58	31	3,310
10	Johnny Kerr J. Kerr	10,092	905	30.7	13.8	11.2	2.2			5.4	13.0	41.8	2.9	4.1	72.3	46.7			27,784	12,480	2,004			2,287
11	Dave DeBusschere D. DeBusschere	9,618	875	35.7	16.1	11.0	2.9	0.9	0.5	6.5	15.1	43.2	3.0	4.3	69.9	47.2	1.9	8.8	31,202	14,053	2,497	67	39	2,801
12	Bailey Howell B. Howell	9,383	950	32.2	18.7	9.9	2.0			6.9	14.3	48.0	5.0	6.6	76.2	54.4			30,627	17,770	1,853			3,498
13	Johnny Green J. Green	9,089	1,057	23.3	11.6	8.6	1.4			4.7	9.5	49.3	2.2	4.0	55.3	51.4			24,617	12,281	1,445			2,855
14	Willis Reed W. Reed	8,414	650	35.5	18.7	12.9	1.8	0.6	1.1	7.5	15.7	47.6	3.8	5.1	74.7	52.3	2.5	4.9	23,073	12,183	1,186	12	21	2,411
15	Larry Foust L. Foust	8,041	817	29.2	13.7	9.8	1.7			4.7	11.5	40.5	4.4	5.9	74.1	48.5			21,890	11,198	1,368			2,909
16	Paul Silas P. Silas	8,024	764	28.8	10.8	10.5	2.2	0.8	0.2	3.9	8.8	44.5	2.9	4.3	67.6	50.3	4.1	7.1	21,983	8,218	1,687	63	20	1,987
17	Leroy Ellis L. Ellis	8,005	937	26.5	10.0	8.5	1.4	1.1	1.1	4.1	9.2	44.0	1.9	2.6	73.0	48.4	3.6	7.4	24,848	9,391	1,267	86	87	2,421
18	Elvin Hayes E. Hayes	7,991	490	43.7	25.4	16.3	2.1	1.1	3.0	10.3	23.4	43.8	4.9	7.3	66.8	47.7	4.4	13.7	21,403	12,448	1,021	86	240	1,478
19	Oscar Robertson O. Robertson	7,804	1,040	42.2	25.7	7.5	9.5	1.1	0.1	9.1	18.9	48.5	7.4	8.8	83.8	56.4	1.0	3.0	43,886	26,710	9,887	77	4	2,931
20	Wayne Embry W. Embry	7,544	831	26.2	12.5	9.1	1.4			4.8	10.9	44.0	2.9	4.5	64.0	48.4			21,763	10,380	1,194			2,838
21	Gus Johnson G. Johnson	7,379	581	34.7	17.1	12.7	2.7			7.1	16.1	44.0	2.9	4.2	69.9	47.6			20,140	9,944	1,541			2,037
22	Wes Unseld W. Unseld	7,227	449	38.1	12.9	16.1	3.5	1.0	0.3	5.2	10.6	49.4	2.5	3.8	63.9	52.6	2.7	6.5	17,091	5,811	1,581	56	16	1,268
23	Ray Scott R. Scott	7,154	684	31.2	14.9	10.5	2.4			5.7	14.1	40.5	3.5	4.8	72.0	45.9			21,339	10,184	1,618			2,035
24	Bob Boozer B. Boozer	7,119	874	29.2	14.8	8.1	1.4			5.7	12.3	46.2	3.5	4.6	76.1	51.9			25,549	12,964	1,237			2,489
25	Happy Hairston H. Hairston	7,073	702	31.4	15.3	10.1	1.6	0.8	0.2	5.7	11.9	47.6	4.0	5.4	73.7	53.7	4.4	9.2	22,047	10,746	1,095	64	17	2,116