most postseason losses by a championship-winning team

11 teams are tied for losing the most games with >0 series wins in an NBA Finals, with 3 losses. The first three are the Oklahoma City Thunder, the Cleveland Cavaliers and the Miami Heat.

Interpreted as:

most postseason losses by a championship-winning in a season team

	TEAM	L	SERIES W	SEASON	SERIES	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	Thunder	3	1	2024-25	NBA Finals	7	240.0	109.3	41.9	17.6	10.7	5.9	37.0	84.6	43.8	10.1	29.4	34.5	25.1	30.6	82.2	55.7	11.1	30.7	12.6	1,680	765	293	123	75	41	88	152
2	Cavaliers	3	1	2015-16	NBA Finals	7	240.0	100.4	43.9	18.0	9.3	5.4	37.6	82.4	45.6	8.0	24.3	32.9	17.3	23.9	72.5	54.0	11.7	32.1	13.3	1,680	703	307	126	65	38	93	147
3	Heat	3	1	2012-13	NBA Finals	7	243.6	97.0	39.7	21.1	8.7	5.1	37.4	81.6	45.9	9.1	21.1	43.2	13.0	16.9	77.1	54.5	9.9	29.9	11.9	1,705	679	278	148	61	36	83	145
4	Lakers	3	1	2009-10	NBA Finals	7	240.0	90.6	42.4	14.6	7.3	6.1	31.9	76.3	41.8	5.0	17.9	28.0	21.9	28.6	76.5	51.0	13.1	29.3	12.4	1,680	634	297	102	51	43	87	156
5	Spurs	3	1	2004-05	NBA Finals	7	243.6	84.9	41.7	16.4	4.6	5.6	30.9	71.9	42.9	7.3	18.3	39.8	15.9	22.7	69.8	51.8	12.3	29.4	15.0	1,705	594	292	115	32	39	105	142
6	Rockets	3	1	1993-94	NBA Finals	7	240.0	86.1	40.0	20.9	7.1	5.1	31.9	74.7	42.6	5.3	17.3	30.6	17.1	22.7	75.5	50.8	10.6	29.4	15.4	1,680	603	280	146	50	36	108	149
7	Lakers	3	1	1987-88	NBA Finals	7	240.0	98.7	37.6	23.7	5.9	3.0	35.4	75.9	46.7	1.4	5.7	25.0	26.4	35.3	74.9	54.0	10.3	27.3	13.1	1,680	691	263	166	41	21	92	154
8	Celtics	3	1	1983-84	NBA Finals	7	247.1	115.1	48.1	22.7	9.3	4.7	41.7	94.4	44.2	1.3	3.4	37.5	30.4	38.9	78.3	51.6	18.7	29.4	16.0	1,730	806	337	159	65	33	112	194
9	Bullets	3	1	1977-78	NBA Finals	7	243.6	105.1	49.0	23.0	7.7	4.6	42.1	96.4	43.7				20.9	30.1	69.2	47.9	17.6	31.4	14.6	1,705	736	343	161	54	32	102	190
10	Celtics	3	1	1973-74	NBA Finals	7	250.7	96.7	42.4	25.4	8.3	0.7	40.0	92.4	43.3				16.7	21.6	77.5	47.4	12.7	29.7	15.3	1,755	677	297	178	58	5	107	153
11	Knicks	3	1	1969-70	NBA Finals	7	247.1	112.3	48.9	27.4			47.4	103.1	46.0				17.4	22.9	76.3	49.6				1,730	786	342	192				178
12	Celtics	3	1	1968-69	NBA Finals	7	240.0	105.9	55.4	19.3			41.6	99.4	41.8				22.7	28.7	79.1	47.2				1,680	741	388	135				209
13	Celtics	3	1	1965-66	NBA Finals	7	243.6	118.1	61.4	21.0			44.4	101.6	43.7				29.3	35.4	82.7	50.4				1,705	827	430	147				208
14	Celtics	3	1	1961-62	NBA Finals	7	243.6	117.7	61.6	26.7			46.3	105.7	43.8				25.1	33.1	75.9	48.9				1,705	824	431	187				210
15	Celtics	3	1	1959-60	NBA Finals	7	240.0	113.1	64.0	20.6			44.9	109.9	40.8				23.4	31.6	74.2	45.7				1,680	792	448	144				156
16	Celtics	3	1	1956-57	NBA Finals	7	254.3	115.1	69.6	22.6			42.1	114.1	36.9				30.9	42.7	72.2	43.3				1,780	806	487	158				221
17	Nationals	3	1	1954-55	NBA Finals	7	240.0	90.9					29.6						31.7	42.1	75.3					1,680	636						184
18	Lakers	3	1	1953-54	NBA Finals	7	240.0	74.7					27.6	68.4	40.3				19.6	28.4	68.8	46.2				1,680	523						201
19	Lakers	3	1	1951-52	NBA Finals	7	247.1	82.6	46.3	18.9			30.7	74.4	41.3				21.1	30.1	70.1	47.1				1,730	578	324	132				196
20	Royals	3	1	1950-51	NBA Finals	7	240.0	83.3	51.9	24.3			29.4	73.7	39.9				24.4	33.1	73.7	47.2				1,680	583	363	170				182
21	Warriors	2	1	2021-22	NBA Finals	6	240.0	104.8	41.7	23.5	10.3	4.5	38.8	87.2	44.6	15.3	41.8	36.7	11.8	14.7	80.7	56.0	9.8	31.8	13.2	1,440	629	250	141	62	27	79	125
22	Bucks	2	1	2020-21	NBA Finals	6	240.0	111.7	46.3	23.0	8.0	3.5	41.8	89.5	46.7	11.0	31.2	35.3	17.0	23.3	72.9	56.0	13.2	33.2	10.8	1,440	670	278	138	48	21	65	105
23	Lakers	2	1	2019-20	NBA Finals	6	240.0	110.0	45.0	25.0	6.8	4.3	39.5	85.0	46.5	14.0	39.8	35.1	17.0	21.5	79.1	58.2	11.7	33.3	13.7	1,440	660	270	150	41	26	82	124
24	Raptors	2	1	2018-19	NBA Finals	6	240.0	111.5	41.0	23.0	8.2	4.8	38.3	84.3	45.5	12.0	34.3	35.0	22.8	26.5	86.2	58.1	9.7	31.3	12.2	1,440	669	246	138	49	29	73	133
25	Warriors	2	1	2014-15	NBA Finals	6	248.3	100.7	44.2	23.0	8.0	5.0	36.2	83.0	43.6	11.2	31.0	36.0	17.2	24.8	69.1	53.6	10.5	33.7	12.7	1,490	604	265	138	48	30	76	145