Russell Westbrook had the best defensive rating by a guard in 2018-19, with a 103.0 rating.

Interpreted as:

best defensive rating with a minimum of 2000 minutes played per 82 team games guard 2018-2019

	NAME	DRTG	SEASON	TM	GP	MPG	PPG	RPG	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	Russell Westbrook R. Westbrook	103.0	2018-19	OKC	73	36.0	22.9	11.1	10.7	1.9	0.5	8.6	20.2	42.8	1.6	5.6	29.0	4.1	6.2	65.6	50.1	1.5	9.6	4.5	2,630	1,675	807	784	142	33	325	245	+292
2	Eric Bledsoe E. Bledsoe	105.1	2018-19	MIL	78	29.1	15.9	4.6	5.5	1.5	0.4	6.0	12.4	48.4	1.6	4.8	32.9	2.3	3.0	75.0	57.7	1.1	3.6	2.1	2,272	1,241	362	430	116	29	165	156	+560
3	Marcus Smart M. Smart	107.1	2018-19	BOS	80	27.5	8.9	2.9	4.0	1.8	0.4	3.0	7.1	42.2	1.6	4.3	36.4	1.3	1.6	80.6	56.8	0.7	2.2	1.5	2,200	708	234	321	143	28	123	201	+163
4	Donovan Mitchell D. Mitchell	107.1	2018-19	UTA	77	33.7	23.8	4.1	4.2	1.4	0.4	8.6	19.9	43.2	2.4	6.7	36.2	4.1	5.1	80.6	53.7	0.8	3.3	2.8	2,598	1,829	316	322	106	31	218	208	+371
5	Cory Joseph C. Joseph	107.1	2018-19	IND	82	25.2	6.5	3.4	3.9	1.1	0.3	2.8	6.7	41.2	0.7	2.1	32.2	0.4	0.5	69.8	47.4	0.5	2.9	1.0	2,063	537	279	321	94	22	80	131	+211
6	Kyle Lowry K. Lowry	107.6	2018-19	TOR	65	34.0	14.2	4.8	8.7	1.4	0.5	4.7	11.4	41.1	2.4	7.0	34.7	2.5	3.0	83.0	56.2	0.6	4.2	2.8	2,213	926	312	564	91	31	182	166	+536
7	Darren Collison D. Collison	107.6	2018-19	IND	76	28.2	11.2	3.1	6.0	1.4	0.1	4.1	8.7	46.7	1.0	2.6	40.7	2.1	2.5	83.2	57.4	0.5	2.6	1.6	2,143	853	232	459	110	9	125	138	+118
8	Ben Simmons B. Simmons	107.7	2018-19	PHI	79	34.2	16.9	8.8	7.7	1.4	0.8	6.8	12.2	56.3	0.0	0.1	0.0	3.3	5.4	60.0	58.2	2.2	6.6	3.5	2,700	1,337	697	610	112	61	274	209	+116
9	Kyrie Irving K. Irving	107.9	2018-19	BOS	67	33.0	23.8	5.0	6.9	1.5	0.5	9.0	18.5	48.7	2.6	6.5	40.1	3.2	3.7	87.3	59.2	1.1	3.9	2.6	2,214	1,596	335	464	103	34	172	167	+332
10	James Harden J. Harden	108.0	2018-19	HOU	78	36.8	36.1	6.6	7.5	2.0	0.7	10.8	24.5	44.2	4.8	13.2	36.8	9.7	11.0	87.9	61.6	0.8	5.8	5.0	2,867	2,818	518	586	158	58	387	244	+357
11	Danny Green D. Green	108.1	2018-19	TOR	80	27.7	10.3	4.0	1.6	0.9	0.7	3.7	7.9	46.5	2.5	5.4	45.5	0.5	0.6	84.1	63.2	0.8	3.2	0.9	2,215	821	317	126	73	53	75	171	+638
12	Luka Dončić L. Dončić	109.1	2018-19	DAL	72	32.2	21.2	7.8	6.0	1.1	0.3	7.0	16.5	42.7	2.3	7.1	32.7	4.8	6.7	71.3	54.5	1.2	6.6	3.4	2,318	1,526	563	429	77	25	247	137	-118
13	Stephen Curry S. Curry	110.1	2018-19	GSW	69	33.8	27.3	5.3	5.2	1.3	0.4	9.2	19.4	47.2	5.1	11.7	43.7	3.8	4.2	91.6	64.1	0.7	4.7	2.8	2,331	1,881	369	361	92	25	192	166	+689
14	D'Angelo Russell D. Russell	110.2	2018-19	BKN	81	30.2	21.1	3.9	7.0	1.2	0.2	8.1	18.7	43.4	2.9	7.8	36.9	2.0	2.5	78.0	53.3	0.7	3.2	3.1	2,448	1,712	315	563	100	20	253	141	+22
15	Dennis Schröder D. Schröder	110.3	2018-19	OKC	79	29.3	15.5	3.6	4.1	0.8	0.2	5.8	14.0	41.4	1.6	4.6	34.1	2.4	2.9	81.9	50.8	0.5	3.1	2.2	2,314	1,224	284	323	65	12	172	189	+167
16	DeMar DeRozan D. DeRozan	110.8	2018-19	SAS	77	34.9	21.2	6.0	6.2	1.1	0.5	8.2	17.1	48.1	0.1	0.6	15.6	4.8	5.7	83.0	54.2	0.7	5.3	2.6	2,688	1,635	462	475	86	36	199	177	+10
17	Mike Conley M. Conley	110.8	2018-19	MEM	70	33.5	21.1	3.4	6.4	1.3	0.3	7.0	16.0	43.8	2.2	6.1	36.4	4.9	5.8	84.5	56.9	0.6	2.8	1.9	2,342	1,478	239	449	94	22	130	123	+23
18	De'Aaron Fox D. Fox	110.9	2018-19	SAC	81	31.4	17.3	3.8	7.3	1.6	0.6	6.2	13.6	45.8	1.1	2.9	37.1	3.7	5.1	72.7	54.4	0.5	3.2	2.8	2,546	1,399	304	590	133	45	227	204	+68
19	Evan Fournier E. Fournier	111.0	2018-19	ORL	81	31.5	15.1	3.2	3.6	0.9	0.1	5.8	13.2	43.8	1.9	5.6	34.0	1.7	2.1	80.6	53.6	0.5	2.7	1.9	2,553	1,226	258	295	71	12	154	225	+95
20	Garrett Temple G. Temple	111.0	2018-19	TOT	75	27.2	7.8	2.9	1.4	1.0	0.4	2.8	6.6	42.2	1.2	3.5	34.1	1.1	1.4	74.8	54.3	0.4	2.5	0.9	2,040	586	216	106	76	30	70	204	-84
21	Jamal Murray J. Murray	111.3	2018-19	DEN	75	32.6	18.2	4.2	4.8	0.9	0.4	6.8	15.6	43.7	2.0	5.5	36.7	2.5	3.0	84.8	53.8	0.9	3.4	2.1	2,447	1,367	317	363	67	27	158	153	+247
22	Patrick Beverley P. Beverley	111.3	2018-19	LAC	78	27.4	7.6	5.0	3.8	0.9	0.6	2.5	6.1	40.7	1.4	3.6	39.7	1.2	1.6	78.0	56.1	1.0	4.0	1.1	2,137	596	388	300	67	43	85	265	+149
23	Jeremy Lamb J. Lamb	111.5	2018-19	CHA	79	28.5	15.3	5.5	2.2	1.1	0.4	5.5	12.4	44.0	1.5	4.2	34.8	2.9	3.3	88.8	55.2	0.8	4.7	1.0	2,250	1,208	434	172	88	32	80	140	+49
24	Klay Thompson K. Thompson	111.7	2018-19	GSW	78	34.0	21.5	3.8	2.4	1.1	0.6	8.4	18.0	46.7	3.1	7.7	40.2	1.7	2.0	81.6	57.1	0.5	3.4	1.5	2,652	1,680	299	186	84	47	115	157	+349
25	Kentavious Caldwell-Pope K. Caldwell-Pope	111.9	2018-19	LAL	82	24.8	11.4	2.9	1.3	0.9	0.2	4.0	9.2	43.0	1.8	5.3	34.7	1.7	1.9	86.7	56.8	0.6	2.3	0.8	2,035	938	238	110	73	13	65	137	-154