K.C. Jones has the highest winning percentage by a Celtics coach, winning 75.1 percent of the time.

celtics coach with highest win percentage

COACH	W%	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
K.C. Jones	.751	410	241.7	113.5	44.2	28.4	7.6	5.6	16.2	44.6	87.4	51.1	1.9	5.4	35.5	22.3	27.8	80.1	99,100	46,517	18,140	11,661	3,130	2,297	6,624	8,997
Joe Mazzulla	.738	164	242.7	119.3	45.8	26.8	6.6	5.9	12.0	43.1	89.5	48.1	16.3	42.5	38.2	16.9	20.9	80.9	39,810	19,558	7,516	4,393	1,078	968	1,967	2,868
Bill Fitch	.738	328	241.7	111.8	45.1	26.7				44.4	89.5	49.6	1.0			22.1	29.3	75.2	79,270	36,682	14,809	8,742				8,037
Red Auerbach	.667	1,192	241.6	107.7						40.8						26.0	35.1	74.0	288,030	128,374
Bill Russell	.661	245	241.4	115.5						44.9						25.7	35.1	73.2	59,150	28,289						6,360
Ime Udoka	.622	82	242.7	111.8	46.1	24.8	7.2	5.8	13.0	40.7	87.4	46.6	13.2	37.1	35.6	17.0	20.9	81.6	19,905	9,164	3,778	2,036	591	478	1,070	1,521
Tom Heinsohn	.619	690	241.1	110.6						44.5						21.5	27.7	77.8	166,375	76,314						16,982
Doc Rivers	.577	721	242.1	98.0	40.1	22.3	7.9	4.8	14.7	36.5	77.6	47.0	5.9	16.2	36.6	19.0	24.9	76.5	174,590	70,643	28,894	16,102	5,693	3,466	10,578	16,291
Jimmy Rodgers	.573	164	240.8	109.6	45.1	28.1	7.2	5.3	15.6	43.2	87.1	49.6	1.1	4.3	25.8	22.1	27.5	80.7	39,485	17,981	7,394	4,612	1,175	873	2,558	3,593
Brad Stevens	.556	630	241.4	106.4	44.0	23.8	8.0	4.6	13.3	39.5	87.5	45.1	10.6	29.9	35.6	16.9	21.5	78.5	152,075	67,050	27,737	14,974	5,039	2,890	8,348	13,164
Chris Ford	.541	410	241.6	105.1	43.6	24.2	7.9	5.6	14.7	42.0	86.4	48.6	2.0	6.2	32.5	19.2	24.6	77.8	99,075	43,087	17,868	9,942	3,241	2,308	6,039	9,067
Jim O'Brien	.539	258	241.6	94.7	40.7	20.6	9.3	3.9	14.0	34.0	79.9	42.6	8.3	23.5	35.2	18.4	24.5	75.1	62,320	24,420	10,512	5,326	2,400	997	3,611	5,713
Rick Pitino	.411	248	241.3	96.2	41.5	21.4	10.2	4.2	15.4	36.4	83.4	43.6	5.3	15.5	34.0	18.1	24.9	72.9	59,845	23,848	10,297	5,296	2,539	1,043	3,809	6,451
Dave Cowens	.397	68	240.0	108.1	43.3	24.5				43.2	89.9	48.0				21.8	27.8	78.3	16,320	7,353	2,947	1,665				1,592
John Carroll	.389	36	240.0	96.2	39.8	19.3	9.7	3.6	15.8	34.9	78.5	44.5	6.2	19.0	32.7	20.1	26.9	74.5	8,640	3,462	1,433	696	348	129	568	778
John Russell	.389	108	241.6	64.0						24.4						15.1			26,095	6,908
Tom Sanders	.371	62	241.2	106.0	48.4	23.8				42.6	92.0	46.3				20.8	26.6	77.9	14,955	6,573	3,003	1,474				1,558
Alvin Julian	.367	128	241.4	78.2						28.5						21.2	31.1	68.0	30,895	10,012
M.L. Carr	.293	164	242.7	102.1	41.2	21.9	8.9	4.4	15.5	38.0	84.8	44.8	6.1	17.0	36.1	20.0	27.3	73.1	39,810	16,743	6,760	3,584	1,463	721	2,546	3,956