oldest player to average at least 15 rpg in a season

Dennis Rodman and Wilt Chamberlain are tied for the oldest with 15.0+ rebounds per game in a season. They were 36 years old.

	NAME	AGE	RPG	SEASON	TM	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	Dennis Rodman D. Rodman	36	15.0	1997-98	CHI	80	35.7	4.7	2.9	0.6	0.2	1.9	4.5	43.1	0.1	0.3	17.4	0.8	1.4	55.0	45.9	5.3	9.8	1.8	2,856	375	1,201	230	47	18	147	238	+345
2	Wilt Chamberlain W. Chamberlain	36	18.6	1972-73	LAL	82	43.2	13.2	4.5			5.2	7.1	72.7				2.8	5.5	51.0	68.9				3,542	1,084	1,526	365				191
3	Dennis Rodman D. Rodman	35	16.1	1996-97	CHI	55	35.4	5.7	3.1	0.6	0.3	2.3	5.2	44.8	0.1	0.3	26.3	0.9	1.6	56.8	47.9	5.8	10.2	2.0	1,947	311	883	170	32	19	111	172	+573
4	Wilt Chamberlain W. Chamberlain	35	19.2	1971-72	LAL	82	42.3	14.8	4.0			6.0	9.3	64.9				2.7	6.4	42.2	61.0				3,469	1,213	1,572	329				196
5	Wilt Chamberlain W. Chamberlain	34	18.2	1970-71	LAL	82	44.3	20.7	4.3			8.1	15.0	54.5				4.4	8.2	53.8	55.8				3,630	1,696	1,493	352				174
6	Bill Russell B. Russell	34	19.3	1968-69	BOS	77	42.7	9.9	4.9			3.6	8.4	43.3				2.6	5.0	52.6	46.7				3,291	762	1,484	374				231
7	Dennis Rodman D. Rodman	33	16.8	1994-95	SAS	49	32.0	7.1	2.0	0.6	0.5	2.8	4.9	57.1	0.0	0.0	0.0	1.5	2.3	67.6	60.4	5.6	11.2	2.0	1,568	349	823	97	31	23	98	159
8	Wilt Chamberlain W. Chamberlain	33	18.4	1969-70	LAL	12	42.1	27.3	4.1			10.8	18.9	56.8				5.8	13.1	44.6	55.4				505	328	221	49				31
9	Bill Russell B. Russell	33	18.6	1967-68	BOS	78	37.9	12.5	4.6			4.7	11.0	42.5				3.2	5.9	53.7	46.1				2,953	977	1,451	357				242
10	Dennis Rodman D. Rodman	32	17.3	1993-94	SAS	79	37.8	4.7	2.3	0.7	0.4	2.0	3.7	53.4	0.1	0.3	20.8	0.7	1.3	52.0	54.9	5.7	11.6	1.7	2,989	370	1,367	184	52	32	138	229
11	Gus Johnson G. Johnson	32	17.1	1970-71	BAL	66	38.5	18.2	2.9			7.5	16.5	45.3				3.2	4.4	73.8	49.4				2,538	1,202	1,128	192				227
12	Wilt Chamberlain W. Chamberlain	32	21.1	1968-69	LAL	81	45.3	20.5	4.5			7.9	13.6	58.3				4.7	10.6	44.6	56.4				3,669	1,664	1,712	366				142
13	Bill Russell B. Russell	32	21.0	1966-67	BOS	81	40.7	13.3	5.8			4.9	10.7	45.4				3.5	5.8	61.0	50.0				3,297	1,075	1,700	472				258
14	Dennis Rodman D. Rodman	31	18.3	1992-93	DET	62	38.9	7.5	1.6	0.8	0.7	3.0	6.9	42.7	0.2	1.2	20.5	1.4	2.6	53.4	46.7	5.9	12.3	1.7	2,410	468	1,132	102	48	45	103	201
15	Nate Thurmond N. Thurmond	31	17.1	1972-73	GSW	79	43.3	17.1	3.5			6.5	14.7	44.6				4.0	5.6	71.8	49.9				3,419	1,349	1,349	280				240
16	Bill Bridges B. Bridges	31	15.0	1970-71	ATL	82	38.3	11.9	2.9			4.7	10.2	45.8				2.6	4.0	63.9	49.8				3,140	975	1,233	240				317
17	Wilt Chamberlain W. Chamberlain	31	23.8	1967-68	PHI	82	46.8	24.3	8.6			10.0	16.8	59.5				4.3	11.4	38.0	55.7				3,836	1,992	1,952	702				160
18	Bill Russell B. Russell	31	22.8	1965-66	BOS	78	43.4	12.9	4.8			5.0	12.1	41.5				2.9	5.2	55.1	44.8				3,386	1,005	1,779	371				221
19	Bob Pettit B. Pettit	31	15.3	1963-64	STL	80	41.2	27.4	3.2			9.9	21.4	46.3				7.6	9.6	78.9	53.5				3,296	2,190	1,224	259				300
20	Dennis Rodman D. Rodman	30	18.7	1991-92	DET	82	40.3	9.8	2.3	0.8	0.9	4.2	7.7	53.9	0.4	1.2	31.7	1.0	1.7	60.0	57.4	6.4	12.3	1.7	3,301	800	1,530	191	68	70	140	248
21	Swen Nater S. Nater	30	15.0	1979-80	SDC	81	35.3	13.4	2.9	0.6	0.5	5.5	9.9	55.4	0.0	0.0	0.0	2.4	3.4	71.8	58.9	4.3	10.7	3.2	2,860	1,082	1,216	233	45	37	257	259
22	Nate Thurmond N. Thurmond	30	16.1	1971-72	GSW	78	43.1	21.4	2.9			8.1	18.6	43.2				5.3	7.2	74.3	49.2				3,362	1,673	1,252	230				214
23	Jerry Lucas J. Lucas	30	15.8	1970-71	SFW	80	40.6	19.2	3.7			7.8	15.6	49.8				3.6	4.6	78.7	54.4				3,251	1,535	1,265	293				197
24	Wilt Chamberlain W. Chamberlain	30	24.2	1966-67	PHI	81	45.5	24.1	7.8			9.7	14.2	68.3				4.8	10.8	44.1	63.7				3,682	1,956	1,957	630				143
25	Bill Russell B. Russell	30	24.1	1964-65	BOS	78	44.4	14.1	5.3			5.5	12.6	43.8				3.1	5.5	57.3	47.2				3,466	1,102	1,878	410				204