lowest winning% by a champion team in a regular and postseason

The Washington Bullets have the worst winning percentage by a team with more than 0 championships in a combined regular-season and postseason, winning 56.3 percent of the time in 1977-78.

	TEAM	W%	CHAMPS	SEASON	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	Bullets	.563	1	1977-78	103	242.2	109.8	50.5	23.8	8.2	4.7	43.6	94.9	45.9				22.5	31.8	70.8	50.4	16.6	33.9	19.0	24,945	11,306	5,202	2,450	846	481	1,960	2,430
2	Hawks	.590	1	1957-58	83	240.6	107.7	75.1	21.4			38.6	99.0	39.0				30.5	42.7	71.4	45.7				19,970	8,942	6,232	1,777				2,210
3	Rockets	.596	1	1994-95	104	241.0	104.3	40.2	25.1	8.5	6.2	38.5	80.2	48.1	8.0	21.5	37.3	19.2	25.6	75.0	57.0	10.5	29.7	15.3	25,060	10,845	4,180	2,615	889	642	1,586	2,259
4	Celtics	.600	1	1968-69	100	241.5	110.4	58.3	23.4			43.4	100.2	43.3				23.7	32.3	73.3	48.3				24,150	11,043	5,827	2,336				2,558
5	Nationals	.602	1	1954-55	83	240.9	91.9	54.7	24.8			32.7	88.2	37.1				26.4	35.3	74.8	44.3				19,995	7,626	4,544	2,060				1,952
6	Warriors	.606	1	1974-75	99	241.0	107.1	51.6	24.7	11.8	4.8	44.6	96.2	46.3				18.0	23.8	75.5	50.2	17.0	34.6	20.7	23,860	10,602	5,110	2,445	1,164	477	2,046	2,589
7	Royals	.610	1	1950-51	82	245.8	84.5	46.0	20.7			29.7	78.2	38.0				25.0	33.3	75.2	45.5				20,155	6,930	3,768	1,697				1,872
8	Warriors	.614	1	1946-47	70	240.4	69.6		5.6			25.4	90.5	28.0				18.9	26.9	70.1	34.0				16,825	4,871		395				1,286
9	Lakers	.620	1	1951-52	79	247.0	85.0	52.4	20.6			31.5	84.5	37.2				22.1	29.6	74.6	43.6				19,510	6,718	4,140	1,629				2,122
10	Celtics	.622	1	1956-57	82	242.4	106.3	69.4	20.6			39.2	102.8	38.1				27.9	37.4	74.5	44.6				19,880	8,716	5,692	1,693				2,154
11	Trail Blazers	.624	1	1976-77	101	240.7	110.9	47.7	24.9	10.6	6.1	44.2	91.5	48.3				22.6	29.9	75.6	53.0	14.8	33.0	21.6	24,315	11,203	4,821	2,517	1,074	619	2,181	2,769
12	Bullets	.627	1	1947-48	59	241.3	74.8		6.5			26.6	89.1	29.8				21.7	31.1	69.8	36.4				14,235	4,416		386				1,395
13	Warriors	.634	1	1955-56	82	240.9	103.3	61.0	26.2			36.7	89.8	40.9				29.9	39.5	75.6	48.2				19,755	8,470	5,006	2,145				2,144
14	SuperSonics	.646	1	1978-79	99	241.5	106.2	47.7	23.7	8.4	5.0	42.6	91.3	46.7				20.9	28.0	74.8	51.2	16.2	31.5	19.1	23,910	10,518	4,722	2,351	831	496	1,892	2,346
15	Lakers	.647	1	1953-54	85	241.5	81.5	51.8	18.0			30.1	79.2	38.0				21.3	29.2	73.0	44.3				20,525	6,924	4,400	1,526				2,289
16	Heat	.648	1	2005-06	105	241.0	99.1	42.9	19.9	6.5	5.2	36.6	76.4	47.9	6.1	17.9	34.2	19.8	28.8	68.9	55.6	10.3	32.6	14.7	25,300	10,405	4,500	2,094	683	547	1,543	2,424
17	Bucks	.653	1	2020-21	95	241.1	117.7	48.3	24.8	8.1	4.5	44.1	91.6	48.1	13.6	36.6	37.3	15.9	21.2	75.0	58.3	10.9	37.4	13.6	22,900	11,186	4,591	2,359	765	431	1,288	1,657
18	Celtics	.653	1	1967-68	101	240.5	115.8	69.0	22.0			44.8	101.2	44.2				26.3	36.4	72.3	49.4				24,290	11,700	6,967	2,227				2,670
19	Celtics	.660	1	1975-76	100	241.5	105.2	52.4	23.9	6.7	3.0	42.3	95.3	44.5				20.5	26.2	78.4	49.3	16.4	36.0	19.7	24,150	10,520	5,243	2,387	673	301	1,966	2,483
20	Warriors	.663	1	2021-22	104	240.5	111.2	45.2	27.1	8.5	4.6	40.7	86.4	47.1	14.3	39.0	36.6	15.5	20.2	76.8	58.4	9.8	35.4	14.8	25,010	11,563	4,696	2,817	889	481	1,541	2,197
21	Pistons	.667	1	2003-04	105	241.9	89.4	43.2	20.5	8.0	7.0	33.0	76.8	43.0	4.1	12.3	33.4	19.3	25.7	74.8	50.7	12.5	30.7	15.1	25,400	9,391	4,537	2,149	843	734	1,583	2,182
22	Celtics	.670	1	1965-66	97	240.8	113.2	69.5	22.3			43.5	103.7	42.0				26.2	35.1	74.4	47.5				23,355	10,983	6,744	2,163				2,496
23	Nuggets	.676	1	2022-23	102	241.0	115.3	43.4	28.3	7.4	4.4	43.3	86.3	50.2	11.7	31.0	37.8	17.0	22.3	76.1	60.0	10.1	33.3	14.0	24,580	11,764	4,422	2,883	755	452	1,424	1,910
24	Celtics	.680	1	1973-74	100	241.8	107.8	53.3	26.5	6.8	3.6	43.9	96.7	45.4				20.0	25.0	80.1	50.1	16.2	37.0	21.2	24,175	10,781	5,325	2,646	683	355	2,122	2,291
25	Lakers	.695	1	1952-53	82	242.4	85.0	49.3	19.0			30.6	78.9	38.8				23.8	32.3	73.6	45.6				19,880	6,968	4,042	1,557				2,289