The Washington Bullets had the lowest defensive rating by a team in 1974-75, with a 91.3 rating.

	TEAM	DRTG	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Bullets	91.3	1974-75	82	241.5	104.7	47.5	24.5	11.3	5.0	43.4	93.9	46.2	18.0	23.9	75.2	50.1	13.8	33.7	19.4	19,805	8,585	3,897	2,005	929	409	1,594	1,961
2	Bulls	94.4	1974-75	82	242.4	98.1	47.5	22.4	8.1	4.6	38.6	86.4	44.7	20.9	26.9	77.7	49.9	13.5	34.0	18.1	19,880	8,045	3,893	1,840	668	379	1,482	1,952
3	Celtics	94.7	1974-75	82	240.9	106.5	52.0	26.3	8.1	3.5	43.7	95.4	45.8	19.0	24.0	79.1	50.2	16.0	36.0	19.8	19,755	8,734	4,264	2,159	662	288	1,625	1,913
4	Kings	97.1	1974-75	82	240.6	101.4	45.6	22.6	8.8	4.2	39.7	88.5	44.9	21.9	26.7	82.1	50.5	12.1	33.5	18.8	19,730	8,311	3,736	1,853	724	347	1,542	1,968
5	Warriors	97.3	1974-75	82	241.2	108.5	52.1	25.3	11.9	4.5	45.3	97.3	46.5	17.9	23.4	76.8	50.4	17.3	34.8	20.9	19,780	8,898	4,270	2,076	972	365	1,716	2,109
6	Trail Blazers	97.7	1974-75	82	242.4	103.8	46.4	26.9	9.2	4.9	41.6	86.7	48.0	20.5	27.6	74.2	52.5	12.8	33.6	22.4	19,880	8,508	3,807	2,209	755	399	1,833	2,055
7	SuperSonics	97.7	1974-75	82	242.4	103.1	45.4	24.4	10.2	4.6	42.5	93.3	45.6	18.0	24.0	74.9	49.6	13.9	31.5	19.6	19,880	8,451	3,721	1,997	837	378	1,610	1,977
8	Bucks	97.8	1974-75	82	241.5	100.7	46.2	23.6	7.3	4.9	42.1	89.8	46.8	16.5	21.3	77.5	50.7	12.5	33.7	18.8	19,805	8,254	3,787	1,932	596	400	1,540	1,949
9	Braves	97.8	1974-75	82	240.6	107.8	46.9	25.2	8.8	5.6	43.3	91.1	47.6	21.2	27.1	78.0	52.3	13.5	33.4	20.9	19,730	8,839	3,843	2,063	718	456	1,710	1,879
10	Cavaliers	98.0	1974-75	82	242.4	99.0	43.4	23.2	7.3	4.2	41.6	89.9	46.2	15.9	21.4	74.2	49.8	12.9	30.5	17.8	19,880	8,117	3,560	1,903	600	348	1,462	1,881
11	Knicks	98.3	1974-75	82	240.6	100.4	44.3	20.4	8.0	3.7	41.0	91.0	45.0	18.5	24.0	77.2	49.4	12.0	32.3	16.8	19,730	8,236	3,633	1,675	652	300	1,374	2,001
12	Suns	98.6	1974-75	82	241.5	101.2	49.2	22.9	8.1	3.9	41.2	92.2	44.7	18.7	25.4	73.7	48.9	16.5	32.7	21.5	19,805	8,297	4,033	1,879	664	317	1,760	2,090
13	76ers	98.8	1974-75	82	241.5	99.8	47.6	20.8	7.0	3.2	40.5	91.2	44.5	18.7	24.9	74.9	48.8	14.6	33.0	19.4	19,805	8,180	3,906	1,709	576	263	1,591	1,974
14	Rockets	99.4	1974-75	82	241.2	103.9	44.8	26.3	9.1	4.3	42.0	88.2	47.7	19.8	24.8	79.9	52.4	14.4	30.4	21.5	19,780	8,521	3,672	2,155	746	351	1,759	2,068
15	Hawks	99.5	1974-75	82	241.5	105.1	49.9	22.9	9.1	2.8	41.8	95.4	43.8	21.6	29.7	72.8	48.5	17.6	32.4	18.9	19,805	8,620	4,094	1,878	744	227	1,550	1,964
16	Jazz	99.7	1974-75	82	240.6	101.5	45.9	22.2	8.8	3.1	40.3	91.6	44.0	20.9	27.4	76.4	48.9	14.0	31.9	22.0	19,730	8,319	3,760	1,818	725	256	1,802	2,222
17	Pistons	99.7	1974-75	82	240.3	98.9	42.9	23.4	8.3	4.6	40.1	86.0	46.6	18.7	24.1	77.6	51.2	12.2	30.7	19.0	19,705	8,111	3,517	1,916	679	380	1,557	1,866
18	Lakers	99.9	1974-75	82	242.1	103.2	49.7	25.5	9.2	5.2	41.6	92.4	45.0	20.0	26.6	75.2	49.5	16.0	33.7	21.8	19,855	8,459	4,075	2,091	755	423	1,785	2,079