The Dallas Mavericks have the worst net rating by a team in a season, with a -15.2 rating in 1992-93.

who has the worst net rating in nba history single season

TEAM	NETRTG	SEASON	GP	ORTG	DRTG	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
Dallas Mavericks	-15.2	1992-93	82	99.5	114.7	240.6	99.3	42.7	20.5	7.9	4.3	17.8	38.6	88.7	43.5	3.5	10.2	33.8	18.7	26.5	70.5	19,730	8,141	3,499	1,683	649	355	1,459	2,302
Charlotte Bobcats	-15.2	2011-12	66	95.2	110.4	240.8	87.0	39.0	20.1	6.0	5.5	14.5	33.2	80.2	41.4	4.0	13.5	29.5	16.5	22.2	74.6	15,890	5,739	2,571	1,326	397	361	957	1,249
Denver Nuggets	-13.1	1997-98	82	99.0	112.1	240.6	89.0	39.0	18.9	8.1	4.8	16.0	32.6	78.2	41.7	3.5	10.9	32.3	20.2	26.2	77.2	19,730	7,300	3,197	1,547	664	393	1,312	1,937
Los Angeles Clippers	-12.3	1999-00	82	97.8	110.1	240.3	92.0	40.6	18.0	7.0	6.0	16.2	35.1	82.4	42.6	5.2	15.5	33.9	16.6	22.3	74.6	19,705	7,546	3,332	1,479	578	494	1,325	1,821
Denver Nuggets	-11.8	1949-50	62	79.5	91.3	240.0	77.7		16.8				27.9	83.6	33.4				21.9	32.2	67.8	14,880	4,817		1,044				1,692
Vancouver Grizzlies	-11.5	1996-97	82	100.3	111.8	241.2	89.2	38.8	22.7	8.0	5.7	15.9	34.4	78.7	43.7	5.4	15.5	34.9	15.0	21.1	70.9	19,780	7,313	3,178	1,862	657	464	1,301	1,755
Houston Rockets	-11.3	1982-83	82	97.0	108.3	240.6	99.3	42.3	23.5	7.9	5.1	19.2	40.7	90.8	44.8	0.8	3.3	24.7	17.1	23.6	72.5	19,730	8,145	3,466	1,931	646	422	1,571	2,131
Miami Heat	-11.2	1988-89	82	97.8	109.0	242.1	97.8	42.9	23.9	9.1	5.0	21.1	39.3	86.8	45.3	1.2	3.6	32.6	18.0	25.6	70.2	19,855	8,016	3,520	1,958	744	408	1,728	2,124
Los Angeles Clippers	-11.1	1986-87	82	101.2	112.3	241.2	104.5	41.1	24.0	9.2	5.3	18.2	40.4	89.4	45.2	1.0	4.2	22.4	22.8	30.7	74.2	19,780	8,566	3,368	1,971	751	432	1,493	2,004
Providence Steam Rollers	-10.9	1947-48	48	65.4	76.3	241.0	69.1		7.2				26.4	96.5	27.4				16.3	26.6	61.3	11,570	3,318		347				1,105
Vancouver Grizzlies	-10.8	1995-96	82	97.6	108.5	242.4	89.8	38.1	20.8	8.9	4.1	16.4	33.8	79.1	42.8	4.5	13.8	32.9	17.6	24.4	72.4	19,880	7,362	3,127	1,706	728	333	1,347	1,852
Philadelphia 76ers	-10.8	1995-96	82	102.2	113.0	240.6	94.5	38.9	19.9	7.8	5.1	17.2	34.1	78.3	43.6	6.0	17.5	34.2	20.3	27.6	73.4	19,730	7,746	3,192	1,629	643	420	1,414	1,777
Portland Trail Blazers	-10.8	2005-06	82	101.1	111.9	240.6	88.8	37.7	18.2	6.5	5.3	14.7	34.0	76.4	44.5	4.4	12.7	34.9	16.3	23.7	68.9	19,730	7,285	3,089	1,490	529	435	1,205	1,828
Chicago Bulls	-10.7	1998-99	50	92.4	103.0	241.5	81.9	39.3	20.3	8.7	3.4	15.5	30.8	76.7	40.1	3.5	12.2	28.9	16.8	23.7	70.9	12,075	4,095	1,967	1,017	436	169	774	1,112
Philadelphia 76ers	-10.6	1972-73	82	91.1	101.6	240.6	104.1	50.9	20.6				42.3	100.8	42.0				19.5	26.0	75.0	19,730	8,540	4,174	1,688				1,984
Atlanta Hawks	-10.5	2004-05	82	100.6	111.1	242.1	92.7	41.9	19.7	7.7	4.2	16.1	35.9	81.4	44.1	3.7	11.9	31.2	17.3	24.3	71.1	19,855	7,605	3,435	1,614	629	344	1,319	2,009
Charlotte Hornets	-10.5	2023-24	82	109.3	119.8	240.6	106.6	40.3	24.8	6.9	4.5	13.8	40.0	87.0	46.0	12.1	34.0	35.5	14.5	18.4	78.6	19,730	8,740	3,303	2,033	562	371	1,129	1,472
Oklahoma City Thunder	-10.5	2020-21	72	103.5	114.0	241.0	105.0	45.6	22.1	7.0	4.4	16.1	38.8	88.0	44.1	11.9	35.1	33.9	15.5	21.3	72.5	17,355	7,560	3,283	1,588	504	316	1,162	1,305
Philadelphia 76ers	-10.4	2013-14	82	99.4	109.9	242.1	99.5	42.7	21.8	9.3	4.0	16.9	37.9	87.2	43.5	7.0	22.5	31.2	16.6	23.4	71.0	19,855	8,155	3,505	1,791	765	330	1,384	1,844
Chicago Bulls	-10.4	1999-00	82	94.2	104.6	241.5	84.8	40.9	20.1	7.9	4.7	19.0	31.3	75.4	41.5	4.1	12.6	32.9	18.1	25.5	70.9	19,805	6,952	3,355	1,645	646	383	1,557	1,908
Philadelphia 76ers	-10.4	2015-16	82	98.8	109.2	241.5	97.4	41.2	21.5	8.3	6.0	16.4	36.2	84.0	43.1	9.3	27.5	33.9	15.7	22.6	69.4	19,805	7,988	3,382	1,765	680	495	1,343	1,780
Los Angeles Clippers	-10.2	1987-88	82	97.4	107.6	241.5	98.8	43.2	23.0	8.8	6.3	18.7	38.9	87.7	44.3	1.0	3.9	24.9	20.0	28.1	71.3	19,805	8,103	3,541	1,885	721	520	1,534	1,908
Cleveland Cavaliers	-10.2	2002-03	82	96.5	106.7	241.8	91.4	44.6	20.9	7.8	6.4	18.3	34.8	82.3	42.2	3.6	10.9	32.7	18.3	24.5	74.7	19,830	7,495	3,660	1,712	636	521	1,501	1,864
Cleveland Cavaliers	-10.2	1970-71	82	92.9	103.0	240.0	102.1	48.6	25.2				40.2	94.9	42.4				21.6	29.0	74.6	19,680	8,373	3,982	2,065				2,114
New York Knicks	-10.1	2014-15	82	99.9	110.0	242.1	91.9	40.4	21.3	7.0	4.7	14.7	35.1	82.0	42.8	6.8	19.7	34.7	14.8	19.2	76.9	19,855	7,535	3,310	1,746	575	382	1,206	1,768