what team had the largest point differential in an nba overtime game before 2019

Before 2018-19, the Miami Heat and the Dallas Mavericks were tied for the highest point differential in an overtime, with a 12 point differential.

Interpreted as:

What team had the largest point differential in an NBA overtime regular-season game before 2019?

	TEAM	DIFF	DATE	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Heat	12	11/1/2016	MIA	vs	SAC	25	17	6	3	0	2	6	9	66.7	3	3	100.0	2	2	100.0	86.0	1	5	2	2
2	Mavericks	12	3/20/2016	DAL	vs	POR	25	19	8	5	0	1	6	10	60.0	3	4	75.0	4	4	100.0	80.8	0	8	0	4
3	Mavericks	12	1/20/2016	DAL	vs	MIN	25	17	6	3	0	0	6	8	75.0	2	2	100.0	3	3	100.0	91.2	0	6	2	1
4	Lakers	11	3/24/2017	LAL	vs	MIN	25	21	6	4	1	0	6	8	75.0	1	1	100.0	8	10	80.0	84.7	1	5	0	1
5	Thunder	11	11/30/2016	OKC	vs	WAS	25	21	8	1	0	0	5	7	71.4	1	2	50.0	10	12	83.3	85.5	2	6	0	2
6	Mavericks	11	11/6/2016	DAL	vs	MIL	25	12	4	1	3	0	4	8	50.0	2	4	50.0	2	2	100.0	67.6	1	3	1	3
7	Lakers	10	4/4/2018	LAL	vs	SAS	25	14	6	2	1	0	3	6	50.0	2	4	50.0	6	8	75.0	73.5	0	6	1	0
8	Pacers	10	12/10/2017	IND	vs	DEN	25	12	3	0	0	1	5	6	83.3	1	2	50.0	1	1	100.0	93.2	0	3	2	2
9	Hornets	10	12/17/2015	CHA	vs	TOR	25	19	7	3	1	0	4	6	66.7	2	3	66.7	9	9	100.0	95.4	0	7	2	1
10	Mavericks	10	2/7/2015	DAL	vs	POR	25	15	7	1	0	1	5	10	50.0	1	2	50.0	4	4	100.0	63.8	4	3	0	5
11	Bucks	10	12/29/2014	MIL	@	CHA	25	21	4	1	1	0	7	8	87.5	1	2	50.0	6	7	85.7	94.8	0	4	1	3
12	Hornets	9	3/26/2018	CHA	vs	NYK	25	20	4	3	0	0	7	8	87.5	3	4	75.0	3	3	100.0	107.3	0	4	0	0
13	Magic	9	3/2/2018	ORL	vs	DET	25	11	8	2	0	0	2	6	33.3	1	4	25.0	6	8	75.0	57.8	1	7	0	3
14	Jazz	9	11/1/2017	UTA	vs	POR	25	18	6	0	0	0	3	4	75.0	2	3	66.7	10	12	83.3	97.0	0	6	1	4
15	Grizzlies	9	1/6/2017	MEM	@	GSW	25	17	5	5	1	0	7	8	87.5	1	1	100.0	2	2	100.0	95.7	0	5	1	1
16	Grizzlies	9	10/30/2016	MEM	vs	WAS	25	12	6	2	0	1	3	5	60.0	2	4	50.0	4	4	100.0	88.8	0	6	1	1
17	Pacers	9	10/26/2016	IND	vs	DAL	25	15	4	2	3	0	5	7	71.4	2	2	100.0	3	4	75.0	85.6	0	4	2	3
18	Jazz	9	2/1/2016	UTA	vs	CHI	25	12	7	2	1	0	4	6	66.7	0	0		4	8	50.0	63.0	1	6	1	3
19	Grizzlies	9	12/29/2015	MEM	vs	MIA	25	16	6	2	1	2	5	8	62.5	0	2	0.0	6	7	85.7	72.2	2	4	0	1
20	Timberwolves	9	11/7/2015	MIN	@	CHI	25	9	9	2	0	3	3	10	30.0	0	1	0.0	3	5	60.0	36.9	4	5	0	0
21	Bulls	9	3/11/2015	CHI	@	PHI	25	12	7	2	0	0	5	8	62.5	1	1	100.0	1	2	50.0	67.6	0	7	0	1
22	Hornets	9	1/17/2015	CHA	vs	IND	25	12	11	1	1	0	4	10	40.0	0	0		4	7	57.1	45.9	3	8	0	1
23	Magic	9	11/7/2014	ORL	vs	MIN	25	18	3	5	1	1	7	8	87.5	1	1	100.0	3	3	100.0	96.6	0	3	0	7
24	Bulls	8	12/8/2017	CHI	@	CHA	25	13	7	2	1	0	3	8	37.5	1	3	33.3	6	8	75.0	56.4	1	6	2	6
25	Celtics	8	11/20/2017	BOS	@	DAL	25	14	7	1	0	0	5	9	55.6	0	1	0.0	4	5	80.0	62.5	0	7	0	1