how many world series have the red sox lost

The Boston Red Sox have 4 series losses in the World Series all-time.

	TEAM	DATE	SERIES L	SEASON	SERIES	TM		OPP	RESULT	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Americans	10/1/1903	0	1903	World Series	BSA	vs	PIT	L 3-7	35	3	6	0	2	0	3	0	1	10	0	0	36	10	2	0		0	0	.171	.194	.286	.480
2	Americans	10/2/1903	0	1903	World Series	BSA	vs	PIT	W 3-0	29	3	8	1	0	2	3	6	1	1	2	0	38	15	3	2		0	2	.276	.417	.517	.934
3	Americans	10/3/1903	0	1903	World Series	BSA	vs	PIT	L 2-4	31	2	4	2	0	0	2	3	0	6	0	0	34	6	2	0		0	0	.129	.206	.194	.399
4	Americans	10/6/1903	0	1903	World Series	BSA	@	PIT	L 4-5	36	4	9	0	0	0	4	0	0	2	0	0	36	9	0	0		0	0	.250	.250	.250	.500
5	Americans	10/7/1903	0	1903	World Series	BSA	@	PIT	W 11-2	43	11	13	0	5	0	10	3	0	4	2	0	47	23	5	1		0	0	.302	.348	.535	.883
6	Americans	10/8/1903	0	1903	World Series	BSA	@	PIT	W 6-3	38	6	10	1	2	0	4	2	1	2	1	0	41	15	3	0		0	1	.263	.317	.395	.712
7	Americans	10/10/1903	0	1903	World Series	BSA	@	PIT	W 7-3	36	7	11	0	5	0	5	0	0	2	0	2	38	21	5	2		0	1	.306	.306	.583	.889
8	Americans	10/13/1903	0	1903	World Series	BSA	vs	PIT	W 3-0	33	3	8	0	2	0	3	0	0	2	0	0	34	12	2	1		0	0	.242	.242	.364	.606
9	Red Sox	10/8/1912	0	1912	World Series	BSA	@	NYG	W 4-3	31	4	6	2	1	0	4	4	0	6	0	1	37	10	3	2		0	0	.194	.286	.323	.608
10	Red Sox	10/9/1912	0	1912	World Series	BSA	vs	NYG	N 6-6	44	6	10	3	2	0	4	0	0	4	2	1	45	17	5	1		0	0	.227	.227	.386	.614
11	Red Sox	10/10/1912	0	1912	World Series	BSA	vs	NYG	L 1-2	33	1	7	2	0	0	1	1	0	6	1	0	35	9	2	1		0	0	.212	.235	.273	.508
12	Red Sox	10/11/1912	0	1912	World Series	BSA	@	NYG	W 3-1	32	3	8	1	1	0	2	3	0	5	1	1	37	11	2	2		0	1	.250	.314	.344	.658
13	Red Sox	10/12/1912	0	1912	World Series	BSA	vs	NYG	W 2-1	29	2	5	0	2	0	2	0	0	2	0	0	29	9	2	0		0	0	.172	.172	.310	.483
14	Red Sox	10/14/1912	0	1912	World Series	BSA	@	NYG	L 2-5	33	2	7	1	0	0	2	1	0	3	1	0	34	8	1	0		0	1	.212	.235	.242	.478
15	Red Sox	10/15/1912	0	1912	World Series	BSA	vs	NYG	L 4-11	36	4	9	2	0	1	3	5	1	6	0	0	42	14	3	0		0	0	.250	.357	.389	.746
16	Red Sox	10/16/1912	0	1912	World Series	BSA	vs	NYG	W 3-2	35	3	8	3	0	0	3	5	0	4	0	0	40	11	3	0		1	0	.229	.325	.314	.639
17	Red Sox	10/8/1915	0	1915	World Series	BSA	@	PHN	L 1-3	32	1	8	0	0	0	1	2	0	6	1	0	37	8	0	3		0	0	.250	.294	.250	.544
18	Red Sox	10/9/1915	0	1915	World Series	BSA	@	PHN	W 2-1	35	2	10	1	0	0	1	2	0	7	0	3	37	11	1	0		0	0	.286	.324	.314	.639
19	Red Sox	10/11/1915	0	1915	World Series	BSA	vs	PHN	W 2-1	28	2	6	0	1	0	2	2	0	4	0	1	31	8	1	1		1	1	.214	.267	.286	.552
20	Red Sox	10/12/1915	0	1915	World Series	BSA	vs	PHN	W 2-1	28	2	8	1	0	0	2	3	0	6	0	1	33	9	1	2		0	1	.286	.355	.321	.676
21	Red Sox	10/13/1915	0	1915	World Series	BSA	@	PHN	W 5-4	36	5	10	0	1	3	5	2	1	2	0	1	39	21	4	0		0	1	.278	.333	.583	.917
22	Red Sox	10/7/1916	0	1916	World Series	BSA	vs	BKN	W 6-5	31	6	8	3	2	0	5	6	0	6	0	0	40	15	5	3		0	0	.258	.378	.484	.862
23	Red Sox	10/9/1916	0	1916	World Series	BSA	vs	BKN	W 2-1	42	2	7	1	2	0	2	6	0	2	0	0	51	12	3	3		1	1	.167	.271	.286	.557
24	Red Sox	10/10/1916	0	1916	World Series	BSA	@	BKN	L 3-4	31	3	7	0	1	1	3	1	0	4	0	2	32	12	2	0		0	0	.226	.250	.387	.637
25	Red Sox	10/11/1916	0	1916	World Series	BSA	@	BKN	W 6-2	33	6	10	2	0	1	5	3	0	11	1	2	38	15	3	2		0	0	.303	.361	.455	.816
	Total		4							2,653	312	644	105	42	50	290	260	21	458	23	27	3,001	983	197	55	12	35	43	.243	.314	.371	.685