The New York Mets have 3 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	Mets	10/11/1969	0	1969	World Series	NYM	@	BAL	L 1-4	31	1	6	1	0	0	1	4	0	8	0	0	36	7	1	0	1	0	1	.194	.278	.226	.504
2	Mets	10/12/1969	0	1969	World Series	NYM	@	BAL	W 2-1	33	2	6	1	0	1	2	3	0	7	0	0	36	10	2	0	0	1	0	.182	.250	.303	.553
3	Mets	10/14/1969	0	1969	World Series	NYM	vs	BAL	W 5-0	29	5	6	2	0	2	5	5	0	6	0	0	35	14	4	1	0	0	0	.207	.324	.483	.806
4	Mets	10/15/1969	0	1969	World Series	NYM	vs	BAL	W 2-1	34	2	10	1	0	1	1	1	0	7	0	1	36	14	2	1	0	1	2	.294	.314	.412	.726
5	Mets	10/16/1969	0	1969	World Series	NYM	vs	BAL	W 5-3	32	5	7	3	0	2	4	2	1	7	1	0	35	16	5	0	0	0	0	.219	.286	.500	.786
6	Mets	10/13/1973	0	1973	World Series	NYM	@	OAK	L 1-2	32	1	7	1	1	0	1	4	0	5	0	0	37	10	2	1	0	0	1	.219	.306	.313	.618
7	Mets	10/14/1973	0	1973	World Series	NYM	@	OAK	W 10-7	54	10	15	1	0	2	5	4	2	10	0	0	61	22	3	1	0	1	0	.278	.350	.407	.757
8	Mets	10/16/1973	0	1973	World Series	NYM	vs	OAK	L 2-3	43	2	10	2	0	1	1	5	0	5	0	0	49	15	3	1	0	2	0	.233	.313	.349	.661
9	Mets	10/17/1973	0	1973	World Series	NYM	vs	OAK	W 6-1	33	6	13	0	0	1	5	6	1	2	0	0	40	16	1	0	0	1	4	.394	.500	.485	.985
10	Mets	10/18/1973	0	1973	World Series	NYM	vs	OAK	W 2-0	31	2	7	1	1	0	2	4	0	6	0	0	36	10	2	1	0	2	0	.226	.314	.323	.637
11	Mets	10/20/1973	0	1973	World Series	NYM	@	OAK	L 1-3	33	1	6	0	0	0	1	1	0	2	0	0	34	6	0	0	0	0	0	.182	.206	.182	.388
12	Mets	10/21/1973	1	1973	World Series	NYM	@	OAK	L 2-5	35	2	8	2	0	0	1	2	0	6	0	0	37	10	2	0	0	0	1	.229	.270	.286	.556
13	Mets	10/18/1986	0	1986	World Series	NYM	vs	BOS	L 0-1	29	0	4	0	0	0	0	5	0	9	2	0	35	4	0	1	0	0	1	.138	.265	.138	.403
14	Mets	10/19/1986	0	1986	World Series	NYM	vs	BOS	L 3-9	33	3	8	0	0	0	3	5	0	8	0	1	39	8	0	1	0	0	0	.242	.342	.242	.585
15	Mets	10/21/1986	0	1986	World Series	NYM	@	BOS	W 7-1	39	7	13	2	0	1	7	1	0	4	0	0	40	18	3	0	0	0	1	.333	.350	.462	.812
16	Mets	10/22/1986	0	1986	World Series	NYM	@	BOS	W 6-2	36	6	12	2	0	3	6	1	0	4	3	1	37	23	5	0	0	0	1	.333	.351	.639	.990
17	Mets	10/23/1986	0	1986	World Series	NYM	@	BOS	L 2-4	35	2	10	2	0	1	2	1	0	6	0	0	37	15	3	1	0	0	1	.286	.306	.429	.734
18	Mets	10/25/1986	0	1986	World Series	NYM	vs	BOS	W 6-5	36	6	8	0	0	0	3	4	0	9	2	0	43	8	0	2	1	1	1	.222	.293	.222	.515
19	Mets	10/27/1986	0	1986	World Series	NYM	vs	BOS	W 8-5	32	8	10	0	0	2	8	4	1	3	0	0	39	16	2	1	1	2	0	.313	.395	.500	.895
20	Mets	10/21/2000	0	2000	World Series	NYM	@	NYY	L 3-4	43	3	10	3	0	0	3	1	2	10	0	1	47	13	3	1	0	0	0	.233	.283	.302	.585
21	Mets	10/22/2000	0	2000	World Series	NYM	@	NYY	L 5-6	35	5	7	0	0	2	5	0	1	10	0	0	36	13	2	0	0	0	0	.200	.222	.371	.594
22	Mets	10/24/2000	0	2000	World Series	NYM	vs	NYY	W 4-2	31	4	9	4	0	1	4	3	0	13	0	0	36	16	5	1	1	0	0	.290	.343	.516	.859
23	Mets	10/25/2000	0	2000	World Series	NYM	vs	NYY	L 2-3	32	2	6	0	0	1	2	3	0	8	0	0	35	9	1	0	0	0	0	.188	.257	.281	.538
24	Mets	10/26/2000	1	2000	World Series	NYM	vs	NYY	L 2-4	34	2	8	1	0	0	1	4	0	7	0	0	39	9	1	1	0	1	0	.235	.316	.265	.580
25	Mets	10/27/2015	0	2015	World Series	NYM	@	KCR	L 4-5	51	4	11	0	0	1	3	3	1	15	1	1	57	14	1	1	1	0	0	.216	.268	.275	.542
	Total		3							1,016	106	241	30	2	27	91	87	10	208	9	6	1,138	356	59	17	8	13	18	.237	.302	.350	.652