Russell Westbrook has the most games by a guard with 15+ rebounds, with 57 games.

Interpreted as:

most regular-season games with 15+ rebounds by a guard

	NAME	GP	REB	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	Russell Westbrook R. Westbrook	57	936	37.6	24.8	16.4	12.1	1.8	0.4	8.8	21.1	41.5	1.5	5.2	29.8	5.8	7.8	74.0	50.6	2.6	13.8	5.4	2,143	1,414	687	105	23	306	164	+418
2	Josh Hart J. Hart	22	364	39.5	12.4	16.5	6.4	1.5	0.5	4.6	10.5	43.5	1.1	4.0	27.3	2.1	3.0	68.7	52.0	3.3	13.2	2.3	870	272	141	34	11	51	61	+221
3	Luka Dončić L. Dončić	20	327	38.4	33.4	16.4	10.3	1.3	0.7	11.0	23.6	46.5	3.0	8.7	33.9	8.6	11.6	73.7	58.3	2.1	14.3	4.7	767	668	205	26	14	93	53	+88
4	Fat Lever F. Lever	20	340	40.7	20.7	17.0	8.3	2.8	0.4	8.2	17.7	46.2	0.3	1.3	24.0	4.1	5.0	81.8	52.1	5.4	11.6	3.0	813	413	166	55	8	59	54
5	Jason Kidd J. Kidd	11	174	43.3	16.2	15.8	11.5	2.5	0.1	6.0	16.1	37.3	1.4	4.7	28.8	2.8	4.4	64.6	44.9	4.0	11.8	5.2	476	178	126	28	1	57	19	+19
6	Josh Giddey J. Giddey	10	162	35.6	20.3	16.2	8.2	0.7	1.0	8.2	16.2	50.6	1.6	4.1	39.0	2.3	2.8	82.1	58.2	4.2	12.0	3.7	356	203	82	7	10	37	21	+58
7	Ben Simmons B. Simmons	10	164	37.7	18.6	16.4	8.8	1.8	0.9	6.9	13.1	52.7	0.0	0.3	0.0	4.8	8.3	57.8	55.5	3.7	12.7	4.2	377	186	88	18	9	42	38	+26
8	James Harden J. Harden	9	141	38.3	38.7	15.7	10.0	1.9	0.4	10.7	23.6	45.3	5.1	12.8	40.0	12.2	13.8	88.7	65.3	2.1	13.6	5.0	344	348	90	17	4	45	25	+75
9	Magic Johnson M. Johnson	9	144	40.3	18.7	16.0	14.8			6.2	13.8	45.2	0.4	1.7	26.7	5.8	6.1	94.5	56.7				363	168	133				23
10	Michael Jordan M. Jordan	8	131	43.0	38.6	16.4	5.3	1.8	0.9	14.5	28.6	50.7	0.5	2.6	19.0	9.1	10.4	88.0	58.2	6.3	10.1	2.6	344	309	42	14	7	21	23	+18
11	Darrell Walker D. Walker	7	109	40.7	9.9	15.6	9.1	1.0	0.4	3.7	8.6	43.3	0.0	0.1	0.0	2.4	4.1	58.6	47.4	4.0	11.6	2.4	285	69	64	7	3	17	22
12	Alvin Robertson A. Robertson	6	92	37.0	19.0	15.3	8.3	3.5	1.2	8.3	15.7	53.2	0.0	0.2	0.0	2.3	3.8	60.9	54.7	5.8	9.5	3.8	222	114	50	21	7	23	21
13	Clyde Drexler C. Drexler	6	97	41.7	28.2	16.2	6.0	2.0	0.7	10.0	20.8	48.0	1.2	2.8	41.2	7.0	10.0	70.0	55.8	6.7	9.5	3.8	250	169	36	12	4	23	25
14	Tracy McGrady T. McGrady	5	78	44.4	25.2	15.6	5.2	2.2	1.2	9.8	26.4	37.1	1.6	5.0	32.0	4.0	6.2	64.5	43.3	6.0	9.6	3.8	222	126	26	11	6	19	5	+1
15	Tyler Herro T. Herro	3	45	39.4	18.0	15.0	4.0	0.3	1.0	6.3	15.3	41.3	2.0	7.7	26.1	3.3	4.0	83.3	52.7	0.7	14.3	3.3	118	54	12	1	3	10	5	-7
16	Bonzi Wells B. Wells	3	50	32.4	15.3	16.7	2.0	1.0	0.7	6.7	14.3	46.5	0.0	0.7	0.0	2.0	2.7	75.0	49.4	6.7	10.0	3.3	97	46	6	3	2	10	9	-9
17	Kobe Bryant K. Bryant	3	46	42.4	29.0	15.3	9.0	1.7	1.0	10.0	22.0	45.5	1.0	4.0	25.0	8.0	9.0	88.9	55.9	4.7	10.7	4.7	127	87	27	5	3	14	7	+6
18	Steve Francis S. Francis	3	47	43.7	24.3	15.7	10.7	1.3	0.3	7.7	19.7	39.0	1.3	3.7	36.4	7.7	10.7	71.9	49.9	4.7	11.0	4.3	131	73	32	4	1	13	8	+21
19	Jordan Goodwin J. Goodwin	2	36	36.8	16.5	18.0	4.0	2.0	0.0	6.0	19.0	31.6	2.0	5.5	36.4	2.5	3.0	83.3	40.6	8.0	10.0	1.5	74	33	8	4	0	3	5	-11
20	John Konchar J. Konchar	2	32	31.9	9.5	16.0	2.0	1.5	1.0	4.0	7.5	53.3	1.5	4.5	33.3	0.0	0.0		63.3	3.0	13.0	0.5	64	19	4	3	2	1	4	+7
21	LaMelo Ball L. Ball	2	33	39.5	18.5	16.5	10.0	3.0	1.0	6.0	16.0	37.5	1.5	6.5	23.1	5.0	5.5	90.9	50.2	2.0	14.5	3.5	79	37	20	6	2	7	4	+24
22	Malcolm Brogdon M. Brogdon	2	30	40.6	26.0	15.0	6.0	1.0	0.0	10.5	24.0	43.8	2.0	7.5	26.7	3.0	3.0	100.0	51.3	3.0	12.0	2.5	81	52	12	2	0	5	3	-18
23	RJ Barrett	2	30	36.5	14.0	15.0	3.5	0.5	1.0	4.5	13.5	33.3	0.0	2.0	0.0	5.0	9.5	52.6	39.6	3.5	11.5	1.5	73	28	7	1	2	3	6	+11
24	Rajon Rondo R. Rondo	2	32	45.8	18.5	16.0	17.0	1.0	0.5	8.0	17.0	47.1	0.0	0.0		2.5	4.5	55.6	48.7	3.5	12.5	5.0	92	37	34	2	1	10	4	+15
25	Caron Butler C. Butler	2	31	46.0	23.0	15.5	2.5	2.0	0.0	9.0	22.5	40.0	0.0	2.0	0.0	5.0	6.0	83.3	45.7	7.5	8.0	2.0	92	46	5	4	0	4	8	-9