The Dallas Mavericks have the lowest point differential per game played by a team in a season, with -15.2 in 1992-93.

who has the lowest average point differential average in a season in nba history

Interpreted as:

Who has the lowest average point differential per game average in a season in NBA history?

TEAM	GP	DIFF/GP	DIFF	SEASON	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	82	-15.2	-1,246	1992-93	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	66	-13.91	-918	2011-12	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
Philadelphia 76ers	82	-12.09	-991	1972-73	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
Denver Nuggets	82	-11.78	-966	1997-98	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
Houston Rockets	82	-11.6	-951	1982-83	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
Providence Steam Rollers	48	-11.56	-555	1947-48	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
Los Angeles Clippers	82	-11.52	-945	1999-00	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	62	-11.5	-713	1949-50	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
Los Angeles Clippers	82	-11.43	-937	1986-87	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
Miami Heat	82	-11.23	-921	1988-89	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
Cleveland Cavaliers	82	-11.17	-916	1970-71	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
Denver Nuggets	82	-10.91	-895	1990-91	240.6	119.9	49.4	24.5	10.4	5.0	16.2	47.6	108.1	44.0	3.7	12.9	28.3	21.0	27.6	76.3	19,730	9,828	4,050	2,005	856	406	1,332	2,235
Oklahoma City Thunder	72	-10.64	-766	2020-21	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	82	-10.45	-857	2013-14	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
Los Angeles Clippers	82	-10.32	-846	1987-88	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
Charlotte Hornets	82	-10.24	-840	2023-24	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
Philadelphia 76ers	82	-10.23	-839	2015-16	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
Vancouver Grizzlies	82	-10.23	-839	1996-97	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
San Antonio Spurs	82	-10.04	-823	2022-23	242.1	113.0	43.7	27.2	7.0	3.9	15.3	43.1	92.6	46.5	11.1	32.2	34.5	15.8	21.2	74.3	19,855	9,269	3,584	2,232	572	322	1,253	1,630
Philadelphia 76ers	82	-10	-820	1995-96	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
Vancouver Grizzlies	82	-9.98	-818	1995-96	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
Los Angeles Clippers	82	-9.91	-813	1988-89	242.1	106.2	43.2	26.9	9.9	6.5	20.3	43.0	90.6	47.5	0.7	2.9	23.1	19.6	27.1	72.3	19,855	8,712	3,540	2,208	815	530	1,666	1,937
Portland Trail Blazers	82	-9.73	-798	1971-72	241.5	106.8	48.7	25.5				42.2	95.6	44.2				22.4	30.4	73.6	19,805	8,759	3,996	2,090				1,873
Miami Heat	82	-9.72	-797	1989-90	240.6	100.6	43.4	23.9	9.0	4.7	19.0	41.3	89.6	46.1	1.1	3.7	29.3	17.0	24.7	68.7	19,730	8,247	3,555	1,957	736	388	1,557	2,123
Atlanta Hawks	82	-9.71	-796	2004-05	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