Dwight Howard had the most games with 20+ rebounds and 3+ blocks, with 38 games.

Interpreted as:

most regular-season games by a player with 20 or more rebounds and 3 or more blocks

	NAME	GP	REB	BLK	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	AST	STL	TOV	PF	+/-
1	Dwight Howard D. Howard	38	816	156	39.5	19.8	21.5	1.5	1.1	4.1	6.9	12.6	55.1	0.0	0.2	11.1	5.9	11.2	53.3	56.7	5.5	16.0	3.7	1,500	753	58	42	140	124	+317
2	Hakeem Olajuwon H. Olajuwon	36	772	189	41.7	27.8	21.4	2.8	2.4	5.3	11.1	21.4	51.6	0.0	0.1	0.0	5.7	8.3	69.0	55.5	6.4	15.0	3.4	1,501	1,001	100	86	122	150	+11
3	Dikembe Mutombo D. Mutombo	34	764	188	42.0	15.0	22.5	1.6	0.6	5.5	5.0	9.1	54.9	0.0	0.0	0.0	5.0	7.3	69.0	61.0	6.7	15.8	3.1	1,428	509	55	19	107	98	+107
4	Ben Wallace B. Wallace	27	591	115	41.5	9.4	21.9	2.0	1.3	4.3	3.8	7.7	49.3	0.1	0.1	66.7	1.8	4.3	41.9	49.3	6.4	15.4	1.3	1,120	255	55	36	35	61	+151
5	Andre Drummond A. Drummond	25	558	94	37.2	20.0	22.3	2.0	2.0	3.8	8.3	14.2	58.4	0.0	0.3	0.0	3.3	6.5	51.2	58.4	7.0	15.3	2.1	931	499	50	51	53	79	+241
6	Marcus Camby M. Camby	22	476	115	38.5	13.9	21.6	3.1	1.1	5.2	5.7	11.5	49.8	0.0	0.3	0.0	2.5	3.2	77.1	53.9	5.0	16.6	2.0	846	306	69	24	45	65	+213
7	DeAndre Jordan D. Jordan	20	428	72	37.2	13.6	21.4	1.8	0.7	3.6	5.4	7.8	68.6	0.0	0.0		2.9	6.6	44.3	63.7	7.4	14.0	1.5	743	272	36	13	29	53	+226
8	Shaquille O'Neal S. O'Neal	20	444	108	43.2	31.0	22.2	2.9	0.4	5.4	12.6	21.2	59.6	0.0	0.0		5.8	10.4	55.8	60.3	7.9	14.3	3.3	863	620	57	7	66	66	+81
9	Hassan Whiteside H. Whiteside	17	360	73	34.4	18.2	21.2	0.9	0.7	4.3	7.5	11.9	63.4	0.1	0.1	50.0	3.1	5.3	57.8	63.9	5.7	15.5	2.5	585	309	16	12	43	51	+159
10	Patrick Ewing P. Ewing	15	321	79	40.3	28.3	21.4	3.5	1.2	5.3	11.1	21.9	50.6	0.1	0.1	50.0	6.1	8.7	70.0	55.0	6.0	15.4	3.4	604	424	52	18	51	58	+23
11	Tim Duncan T. Duncan	14	301	63	42.5	25.1	21.5	2.8	0.9	4.5	9.4	19.6	47.6	0.1	0.4	33.3	6.2	9.4	65.9	52.7	5.6	15.9	3.9	595	351	39	12	54	36	0
12	Kevin Garnett K. Garnett	13	277	49	42.4	23.7	21.3	6.0	0.7	3.8	9.8	20.4	48.3	0.5	1.1	42.9	3.5	4.8	73.0	52.6	4.7	16.6	2.8	551	308	78	9	37	36	+65
13	David Robinson D. Robinson	11	237	60	41.7	28.9	21.5	3.2	1.5	5.5	10.5	19.5	53.7	0.0	0.1	0.0	8.0	11.5	69.8	59.0	7.7	13.8	3.5	459	318	35	17	38	35	+12
14	Clint Capela C. Capela	10	219	38	36.7	19.6	21.9	1.0	1.0	3.8	8.8	14.4	61.1	0.0	0.0		2.0	3.5	57.1	61.5	8.1	13.8	0.9	367	196	10	10	9	24	+131
15	Rudy Gobert R. Gobert	10	218	41	35.8	17.2	21.8	1.6	1.2	4.1	6.5	9.6	67.7	0.0	0.0		4.2	6.2	67.7	69.8	6.3	15.5	1.2	358	172	16	12	12	30	+123
16	Charles Barkley C. Barkley	9	195	34	44.2	24.2	21.7	4.6	1.9	3.8	9.1	15.4	59.0	0.1	1.0	11.1	5.9	7.6	77.9	64.5	7.0	14.7	6.2	398	218	41	17	56	36
17	Anthony Davis A. Davis	8	179	28	40.2	29.1	22.4	2.8	2.1	3.5	10.0	19.9	50.3	0.9	2.5	35.0	8.3	9.6	85.7	60.4	5.5	16.9	2.6	321	233	22	17	21	17	+39
18	DeMarcus Cousins D. Cousins	7	145	28	40.7	33.1	20.7	6.0	1.1	4.0	12.1	24.0	50.6	0.9	2.6	33.3	8.0	11.9	67.5	56.7	4.1	16.6	4.9	285	232	42	8	34	27	+2
19	Tyson Chandler T. Chandler	6	128	20	34.4	12.0	21.3	1.5	0.5	3.3	4.3	10.0	43.3	0.0	0.2	0.0	3.3	5.3	62.5	48.6	8.8	12.5	0.8	207	72	9	3	5	15	+33
20	Rony Seikaly R. Seikaly	6	125	20	42.7	24.3	20.8	1.0	1.0	3.3	8.5	16.2	52.6	0.0	0.0		7.3	12.2	60.3	56.5	5.8	15.0	3.7	256	146	6	6	22	20
21	Robert Parish R. Parish	6	131	21	41.7	17.8	21.8	1.7	1.2	3.5	6.7	15.0	44.4	0.0	0.0		4.5	6.7	67.5	49.7	6.8	15.0	3.3	250	107	10	7	20	24
22	Mark Eaton M. Eaton	6	133	53	41.0	12.0	22.2	1.8	0.7	8.8	3.8	10.8	35.4	0.0	0.0		4.3	5.8	74.3	44.8	6.2	16.0	2.2	246	72	11	4	13	26
23	Bill Laimbeer B. Laimbeer	6	129	21	39.2	20.0	21.5	2.0	0.2	3.5	8.0	16.7	48.0	1.3	2.2	61.5	2.7	3.5	76.2	54.9	6.3	15.2	1.8	235	120	12	1	11	24
24	Moses Malone M. Malone	6	129	25	38.7	22.8	21.5	1.5	1.3	4.2	7.0	19.2	36.5	0.0	0.2	0.0	8.8	12.7	69.7	46.1	9.3	12.2	3.0	232	137	9	8	18	11
25	Alonzo Mourning A. Mourning	5	108	24	39.5	23.8	21.6	1.2	0.2	4.8	8.6	15.6	55.1	0.0	0.0		6.6	9.4	70.2	60.3	7.8	13.8	3.4	198	119	6	1	17	15	+1