Clyde Drexler had the best defensive rating by a guard in 1989-90, with a 103.4 rating.

Interpreted as:

best defensive rating with a minimum of 2000 minutes played per 82 team games 1989-1990 guard

	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	Clyde Drexler C. Drexler	103.4	1989-90	POR	73	36.8	23.3	6.9	5.9	2.0	0.7	9.2	18.6	49.4	0.4	1.5	28.3	4.6	5.9	77.4	55.1	2.8	4.1	2.6	2,683	1,703	507	432	145	51	191	222
2	Isiah Thomas I. Thomas	103.9	1989-90	DET	81	37.0	18.4	3.8	9.4	1.7	0.2	7.1	16.3	43.8	0.5	1.7	30.9	3.6	4.7	77.5	50.1	0.9	2.9	4.0	2,993	1,492	308	765	139	19	322	206
3	Alvin Robertson A. Robertson	104.2	1989-90	MIL	81	32.1	14.2	6.9	5.5	2.6	0.2	5.9	11.7	50.3	0.0	0.3	15.4	2.4	3.3	74.1	54.2	2.8	4.1	2.7	2,599	1,153	559	445	207	17	217	280
4	Fat Lever F. Lever	104.3	1989-90	DEN	79	35.8	18.3	9.3	6.5	2.1	0.2	7.2	16.2	44.3	0.5	1.1	41.4	3.4	4.3	80.4	50.4	2.9	6.4	2.0	2,832	1,443	734	517	168	13	156	172
5	John Stockton J. Stockton	105.3	1989-90	UTA	78	37.4	17.2	2.6	14.5	2.7	0.2	6.1	11.8	51.4	0.6	1.4	41.6	4.5	5.5	81.9	60.7	0.7	1.9	3.5	2,915	1,345	206	1,134	207	18	272	233
6	Terry Porter T. Porter	105.3	1989-90	POR	80	34.8	17.6	3.4	9.1	1.9	0.1	5.6	12.1	46.2	1.1	3.0	37.4	5.3	5.9	89.2	59.7	0.7	2.7	3.1	2,781	1,406	272	726	151	4	245	150
7	Michael Jordan M. Jordan	105.5	1989-90	CHI	82	39.0	33.6	6.9	6.3	2.8	0.7	12.6	24.0	52.6	1.1	3.0	37.6	7.2	8.5	84.8	60.6	1.7	5.1	3.0	3,197	2,753	565	519	227	54	247	241
8	Dan Majerle D. Majerle	105.8	1989-90	PHX	73	30.7	11.1	5.9	2.6	1.4	0.4	4.1	9.6	42.4	0.3	1.1	23.8	2.7	3.6	76.2	49.8	2.0	3.9	1.1	2,244	809	430	188	100	32	82	177
9	Willie Anderson W. Anderson	105.8	1989-90	SAS	82	34.0	15.7	4.5	4.4	1.4	0.7	6.5	13.2	49.2	0.1	0.3	26.9	2.6	3.5	74.8	53.2	1.4	3.1	2.4	2,788	1,288	372	364	111	58	198	252
10	Magic Johnson M. Johnson	106.0	1989-90	LAL	79	37.2	22.3	6.6	11.5	1.7	0.4	6.9	14.4	48.0	1.3	3.5	38.4	7.2	8.1	89.0	62.2	1.6	5.0	3.7	2,937	1,765	522	907	132	34	289	167
11	Darrell Walker D. Walker	106.3	1989-90	WAS	81	35.6	9.5	8.8	8.0	1.7	0.4	3.9	8.6	45.4	0.0	0.3	9.5	1.7	2.5	68.7	49.2	2.1	6.7	2.1	2,883	772	714	652	139	30	173	220
12	Jeff Hornacek J. Hornacek	106.4	1989-90	PHX	67	34.0	17.6	4.7	5.0	1.7	0.2	7.2	13.4	53.6	0.6	1.5	40.8	2.6	3.0	85.6	59.6	1.3	3.4	1.9	2,278	1,179	313	337	117	14	125	144
13	Rod Strickland R. Strickland	106.5	1989-90	TOT	82	26.1	10.6	3.2	5.7	1.5	0.2	4.2	9.2	45.4	0.1	0.4	26.7	2.1	3.4	62.6	49.4	1.1	2.1	2.1	2,140	868	259	468	127	14	170	160
14	Derek Harper D. Harper	106.8	1989-90	DAL	82	36.7	18.0	3.0	7.4	2.3	0.3	6.9	14.2	48.8	1.1	2.9	37.1	3.0	3.8	79.4	56.7	0.7	2.3	2.5	3,007	1,473	244	609	187	26	207	224
15	Joe Dumars J. Dumars	107.2	1989-90	DET	75	34.4	17.8	2.8	4.9	0.8	0.0	6.8	14.1	48.0	0.3	0.7	40.0	4.0	4.4	90.0	55.5	0.8	2.0	1.9	2,578	1,335	212	368	63	2	145	129
16	Maurice Cheeks M. Cheeks	107.3	1989-90	TOT	81	31.1	9.7	3.0	5.6	1.5	0.1	3.8	7.5	50.4	0.0	0.2	25.0	2.1	2.5	84.7	56.5	0.6	2.3	1.5	2,519	789	240	453	124	10	121	78
17	Nate McMillan N. McMillan	107.3	1989-90	SEA	82	28.5	6.4	4.9	7.3	1.7	0.5	2.5	5.3	47.3	0.1	0.4	35.5	1.2	1.9	64.1	51.7	1.5	3.4	2.3	2,338	523	403	598	140	37	187	289
18	Sleepy Floyd S. Floyd	107.4	1989-90	HOU	82	32.1	12.2	2.4	7.3	1.1	0.1	4.4	9.8	45.1	1.1	2.9	38.0	2.3	2.8	80.6	55.2	0.6	1.9	2.5	2,630	1,000	198	600	94	11	204	159
19	Craig Ehlo C. Ehlo	107.4	1989-90	CLE	81	35.7	13.6	5.4	4.6	1.6	0.3	5.4	11.6	46.4	1.3	3.1	41.9	1.6	2.3	68.1	53.9	1.8	3.6	2.0	2,894	1,102	439	371	126	23	161	226
20	Lester Conner L. Conner	107.7	1989-90	NJN	82	28.7	7.9	3.2	4.7	2.1	0.1	2.9	7.0	41.4	0.0	0.2	15.4	2.1	2.6	80.4	48.6	1.1	2.1	1.7	2,355	648	265	385	172	8	138	182
21	Kevin Edwards K. Edwards	108.2	1989-90	MIA	78	28.3	12.0	3.6	3.2	1.6	0.4	5.1	12.3	41.2	0.1	0.4	30.0	1.8	2.3	76.0	45.1	1.0	2.6	2.3	2,211	938	282	252	125	33	180	149
22	Reggie Lewis R. Lewis	108.5	1989-90	BOS	79	31.9	17.0	4.4	2.8	1.1	0.8	6.8	13.8	49.6	0.1	0.2	26.7	3.2	4.0	80.8	54.5	1.4	3.0	1.5	2,522	1,340	347	225	88	63	120	216
23	Kevin Johnson K. Johnson	108.8	1989-90	PHX	74	37.6	22.5	3.6	11.4	1.3	0.2	7.8	15.7	49.9	0.1	0.6	19.5	6.8	8.1	83.8	58.5	0.6	3.1	3.6	2,782	1,665	270	846	95	14	263	143
24	Michael Adams M. Adams	109.0	1989-90	DEN	79	34.1	15.5	2.8	6.3	1.5	0.0	5.0	12.5	40.2	2.0	5.5	36.6	3.4	4.0	85.0	54.2	0.6	2.2	1.8	2,690	1,221	225	495	121	3	141	133
25	Jay Humphries J. Humphries	109.0	1989-90	MIL	81	34.8	15.3	3.3	5.8	1.9	0.1	6.1	12.4	49.4	0.3	0.9	30.0	2.8	3.5	78.6	54.7	1.0	2.3	1.9	2,818	1,237	269	472	156	11	151	253