Wilt Chamberlain has averaged the most rebounds per game by a rookie in a single NBA playoff run, with 25.8 per game in 1959-60.

most rebounds averages players as a rookie in playoff

NAME	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	+/-
Wilt Chamberlain	25.8	1959-60	PHI	9	46.1	33.2	2.1			13.9	28.0	49.6				5.4	12.2	44.5	49.8				415	299	232	19				17
Bill Russell	24.4	1956-57	BOS	10	40.9	13.9	3.2			5.4	14.8	36.5				3.1	6.1	50.8	39.8				409	139	244	32				41
Wes Unseld	18.5	1968-69	BAL	4	41.3	18.8	1.3			7.5	14.3	52.6				3.8	4.8	78.9	57.4				165	75	74	5				14
Eddie Miller	18.0	1952-53	BAL	2	46.5	16.5	2.5			6.5	17.0	38.2				3.5	8.0	43.8	40.2				93	33	36	5				9
Kareem Abdul-Jabbar	16.8	1969-70	MIL	10	43.5	35.2	4.1			13.9	24.5	56.7				7.4	10.1	73.3	60.8				435	352	168	41				25
Clifford Ray	16.5	1971-72	CHI	4	40.3	15.3	4.0			6.8	12.8	52.9				1.8	2.3	77.8	55.5				161	61	66	16				15
Dave DeBusschere	15.8	1962-63	DET	4	39.8	20.0	1.5			6.3	14.8	42.4				7.5	11.0	68.2	51.0				159	80	63	6				14
Ray Scott	14.5	1961-62	DET	10	40.0	17.3	4.3			6.9	17.0	40.6				3.5	6.7	52.2	43.4				400	173	145	43				39
Elvin Hayes	13.8	1968-69	SDR	6	46.3	25.8	0.8			10.0	19.0	52.6				5.8	8.8	66.0	56.4				278	155	83	5				21
Hakeem Olajuwon	13.0	1984-85	HOU	5	37.4	21.2	1.4	1.4	2.6	8.4	17.6	47.7	0.0	0.0		4.4	9.2	47.8	49.0	6.6	6.4	2.2	187	106	65	7	7	13	11	22
Sam Perkins	12.8	1984-85	DAL	4	42.3	18.8	2.8	0.5	0.3	6.0	12.3	49.0	0.3	1.0	25.0	6.5	8.5	76.5	58.6	4.0	8.8	0.8	169	75	51	11	2	1	3	13
Drew Gooden	12.7	2002-03	ORL	7	33.4	14.0	0.6	0.4	0.9	5.1	12.9	40.0	0.0	0.4	0.0	3.7	5.1	72.2	46.3	4.0	8.7	1.7	234	98	89	4	3	6	12	23	-38
Jerry Lucas	12.5	1963-64	CIN	10	37.0	12.2	3.4			4.8	12.3	39.0				2.6	3.7	70.3	43.8				370	122	125	34				37
Marques Johnson	12.4	1977-78	MIL	9	35.7	24.0	3.4	1.1	1.9	9.3	17.0	54.9				5.3	7.1	75.0	59.6	3.9	8.6	1.6	321	216	112	31	10	17	14	25
Nate Thurmond	12.3	1963-64	SFW	12	34.2	10.0	1.0			3.5	8.2	42.9				3.0	4.4	67.9	49.5				410	120	148	12				46
Larry Foust	12.3	1950-51	FTW	3		12.0	1.7			4.7	15.0	31.1				2.7	3.3	80.0	36.4					36	37	5				5
David Robinson	12.0	1989-90	SAS	10	37.5	24.3	2.3	1.1	4.0	8.9	16.7	53.3	0.0	0.0		6.5	9.6	67.7	58.1	3.6	8.4	2.4	375	243	120	23	11	40	24	35
Elgin Baylor	12.0	1958-59	MIN	13	42.8	25.5	3.3			9.4	23.3	40.3				6.7	8.7	77.0	46.9				556	331	156	43				52
Don Henriksen	12.0	1952-53	BAL	2	47.0	12.5	4.0			5.0	7.5	66.7				2.5	4.5	55.6	65.9				94	25	24	8				11
Tom Heinsohn	11.7	1956-57	BOS	10	37.0	22.9	2.0			9.0	23.1	39.0				4.9	6.9	71.0	43.8				370	229	117	20				40
Dean Garrett	11.7	1996-97	MIN	3	39.3	12.7	1.3	0.7	1.0	5.0	9.7	51.7	0.0	0.0		2.7	3.3	80.0	56.9	6.3	5.3	0.3	118	38	35	4	2	3	1	11	-19
Tom Meschery	11.5	1961-62	PHI	12	42.3	20.1	2.7			7.4	18.7	39.7				5.3	6.1	86.3	47.0				508	241	138	32				48
Larry Bird	11.2	1979-80	BOS	9	41.3	21.3	4.7	1.6	0.9	9.2	19.7	46.9	0.4	1.7	26.7	2.4	2.8	88.0	51.1	2.4	8.8	3.7	372	192	101	42	14	8	33	30
Cliff Hagan	11.2	1956-57	STL	10	31.9	17.0	2.8			6.2	14.3	43.4				4.6	6.3	73.0	49.8				319	170	112	28				47
Charles Barkley	11.1	1984-85	PHI	13	31.4	14.9	2.0	1.8	1.2	5.8	10.7	54.0	0.3	0.5	66.7	3.1	4.8	63.5	58.2	4.0	7.1	2.7	408	194	144	26	23	15	35	49