LeBron James has 16 losses against the Celtics in the playoffs in his career.

	NAME	DATE	L	W	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	LeBron James L. James	5/6/2008	1	0	CLE	@	BOS	39	12	9	9	1	1	2	18	11.1	0	6	0.0	8	10	80.0	26.8	2	7	10	4	-7
2	LeBron James L. James	5/8/2008	1	0	CLE	@	BOS	42	21	5	6	2	1	6	24	25.0	0	4	0.0	9	13	69.2	35.3	2	3	7	1	-15
3	LeBron James L. James	5/10/2008	0	1	CLE	vs	BOS	40	21	5	8	4	3	5	16	31.3	3	5	60.0	8	12	66.7	49.3	0	5	2	3	+29
4	LeBron James L. James	5/12/2008	0	1	CLE	vs	BOS	44	21	6	13	3	2	7	20	35.0	2	5	40.0	5	8	62.5	44.6	1	5	4	3	+15
5	LeBron James L. James	5/14/2008	1	0	CLE	@	BOS	45	35	3	5	1	1	12	25	48.0	0	5	0.0	11	13	84.6	57.0	0	3	4	3	-8
6	LeBron James L. James	5/16/2008	0	1	CLE	vs	BOS	47	32	12	6	2	1	9	23	39.1	1	3	33.3	13	15	86.7	54.1	3	9	8	2	+7
7	LeBron James L. James	5/18/2008	1	0	CLE	@	BOS	47	45	5	6	2	0	14	29	48.3	3	11	27.3	14	19	73.7	60.2	1	4	2	4	0
8	LeBron James L. James	5/1/2010	0	1	CLE	vs	BOS	43	35	7	7	3	2	12	24	50.0	3	6	50.0	8	11	72.7	60.7	2	5	2	1	+7
9	LeBron James L. James	5/3/2010	1	0	CLE	vs	BOS	41	24	7	4	3	2	7	15	46.7	0	4	0.0	10	15	66.7	55.6	0	7	5	1	-16
10	LeBron James L. James	5/7/2010	0	1	CLE	@	BOS	39	38	8	7	1	2	14	22	63.6	2	3	66.7	8	9	88.9	73.2	2	6	1	1	+30
11	LeBron James L. James	5/9/2010	1	0	CLE	@	BOS	43	22	9	8	2	1	7	18	38.9	0	5	0.0	8	11	72.7	48.2	1	8	7	4	-10
12	LeBron James L. James	5/11/2010	1	0	CLE	vs	BOS	42	15	6	7	1	0	3	14	21.4	0	4	0.0	9	12	75.0	38.9	1	5	3	3	-22
13	LeBron James L. James	5/13/2010	1	0	CLE	@	BOS	46	27	19	10	3	1	8	21	38.1	2	4	50.0	9	12	75.0	51.4	3	16	9	2	-5
14	LeBron James L. James	5/1/2011	0	1	MIA	vs	BOS	40	22	6	5	2	2	8	19	42.1	1	3	33.3	5	9	55.6	47.9	1	5	3	2	+1
15	LeBron James L. James	5/3/2011	0	1	MIA	vs	BOS	44	35	7	2	1	1	14	25	56.0	2	4	50.0	5	8	62.5	61.4	2	5	0	3	+10
16	LeBron James L. James	5/7/2011	1	0	MIA	@	BOS	43	15	7	4	2	5	6	16	37.5	0	3	0.0	3	7	42.9	39.3	2	5	4	3	-21
17	LeBron James L. James	5/9/2011	0	1	MIA	@	BOS	50	35	14	3	3	0	12	28	42.9	2	6	33.3	9	9	100.0	54.8	3	11	5	3	+7
18	LeBron James L. James	5/11/2011	0	1	MIA	vs	BOS	46	33	7	4	1	1	11	20	55.0	5	7	71.4	6	9	66.7	68.9	2	5	5	1	+14
19	LeBron James L. James	5/28/2012	0	1	MIA	vs	BOS	44	32	13	3	1	3	13	22	59.1	0	3	0.0	6	9	66.7	61.6	1	12	3	2	+17
20	LeBron James L. James	5/30/2012	0	1	MIA	vs	BOS	48	34	10	7	1	1	7	20	35.0	2	6	33.3	18	24	75.0	55.6	4	6	1	2	+10
21	LeBron James L. James	6/1/2012	1	0	MIA	@	BOS	43	34	8	5	2	2	16	26	61.5	1	4	25.0	1	5	20.0	60.3	0	8	3	4	-6
22	LeBron James L. James	6/3/2012	1	0	MIA	@	BOS	48	29	6	3	1	1	12	25	48.0	1	3	33.3	4	8	50.0	50.8	1	5	7	6	+1
23	LeBron James L. James	6/5/2012	1	0	MIA	vs	BOS	45	30	13	2	2	1	11	25	44.0	2	6	33.3	6	8	75.0	52.6	3	10	3	1	0
24	LeBron James L. James	6/7/2012	0	1	MIA	@	BOS	45	45	15	5	0	0	19	26	73.1	2	4	50.0	5	9	55.6	75.1	2	13	4	3	+22
25	LeBron James L. James	6/9/2012	0	1	MIA	vs	BOS	48	31	12	2	1	1	9	21	42.9	1	5	20.0	12	17	70.6	54.4	2	10	3	0	+13
	Average		0.4	0.6				42.8	29.6	8.5	6.3	1.8	1.3	10.5	21.9	48.0	1.6	5.2	31.6	7.0	9.9	70.5	56.5	1.3	7.2	4.4	2.5	5.2
	Total		16	25				1,753	1,214	350	260	73	55	430	896	48.0	67	212	31.6	287	407	70.5	56.5	53	297	180	101	+214