the last time a mlb team won the world series back to back

The Washington Nationals have 1 win in the World Series all-time.

	TEAM	SERIES W	SERIES	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Nationals	1	World Series	7	.571	4	3	241	33	58	8	1	11	32	27	1	61	4	0	272	101	20	3	0	1	5	.241	.320	.419	.739
2	Rangers	1	World Series	17	.471	8	9	563	68	127	25	1	20	66	60	3	126	4	5	636	214	46	4	6	5	16	.226	.301	.380	.681
3	Astros	2	World Series	30	.433	13	17	1,038	120	246	50	2	36	116	100	14	253	22	4	1,165	408	88	7	6	15	23	.237	.311	.393	.704
4	Angels	1	World Series	7	.571	4	3	245	41	76	15	1	7	38	23	2	38	6	0	275	114	23	2	3	5	6	.310	.370	.465	.835
5	Diamondbacks	1	World Series	12	.417	5	7	420	59	112	24	1	9	58	33	6	111	9	3	473	165	34	10	4	7	9	.267	.326	.393	.719
6	Marlins	2	World Series	13	.615	8	5	453	54	115	20	1	10	51	50	2	96	6	3	515	167	31	6	4	5	11	.254	.328	.369	.697
7	Blue Jays	2	World Series	12	.667	8	4	402	62	109	21	5	12	62	43	4	63	13	4	459	176	38	2	8	4	9	.271	.341	.438	.779
8	Royals	2	World Series	25	.520	13	12	869	105	232	48	5	15	100	82	4	185	21	6	970	335	68	8	7	11	26	.267	.331	.386	.716
9	Mets	2	World Series	29	.448	13	16	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
10	Orioles	3	World Series	39	.538	21	18	1,261	135	267	41	4	33	122	125	6	240	5	5	1,407	415	78	8	7	15	27	.212	.284	.329	.614
11	Cardinals	11	World Series	118	.492	58	60	3,931	430	943	185	27	58	395	315	15	659	67	35	4,344	1,356	270	72	11	48	55	.240	.298	.345	.643
12	Twins	3	World Series	40	.475	19	21	1,340	145	319	46	9	36	143	128	6	229	23	18	1,497	491	91	21	2	15	21	.238	.307	.366	.673
13	Yankees	27	World Series	230	.590	135	94	7,713	1,013	1,919	283	52	225	958	814	58	1,342	87	59	8,702	2,981	560	94	23	87	151	.249	.324	.386	.711
14	Indians	2	World Series	37	.459	17	20	1,219	137	279	50	5	28	125	138	7	227	21	14	1,384	423	83	16	4	14	23	.229	.310	.347	.657
15	Reds	5	World Series	51	.510	26	25	1,690	192	411	77	18	27	186	148	13	225	40	26	1,887	605	122	27	9	22	31	.243	.308	.358	.666
16	Dodgers	8	World Series	128	.445	57	71	4,201	454	959	152	27	114	428	403	29	800	66	50	4,709	1,507	293	57	19	34	77	.228	.299	.359	.658
17	Phillies	2	World Series	43	.372	16	27	1,400	156	320	61	6	43	149	148	12	304	29	13	1,585	522	110	16	9	13	28	.229	.306	.373	.679
18	Braves	4	World Series	59	.475	28	31	1,961	213	462	76	10	51	206	207	10	377	42	17	2,225	711	137	34	13	17	46	.236	.310	.363	.672
19	Tigers	4	World Series	65	.422	27	37	2,164	227	491	84	11	33	213	225	22	351	34	27	2,448	696	128	34	3	20	37	.227	.306	.322	.627
20	Cubs	3	World Series	60	.390	23	36	1,997	205	487	85	17	21	179	162	12	366	61	43	2,232	669	123	59	2	7	29	.244	.304	.335	.639
21	White Sox	3	World Series	30	.567	17	13	1,000	106	246	45	8	12	93	79	11	156	24	23	1,111	343	65	20	1	4	15	.246	.308	.343	.651
22	Giants	8	World Series	116	.500	57	57	3,865	426	959	142	29	64	393	314	24	638	63	61	4,276	1,351	235	62	11	29	66	.248	.308	.350	.657
23	Athletics	9	World Series	75	.547	41	34	2,457	267	559	107	14	46	245	223	13	461	41	32	2,753	832	167	56	4	22	31	.228	.295	.339	.633
24	Pirates	5	World Series	47	.489	23	24	1,576	175	401	76	16	19	161	109	19	226	41	16	1,738	566	111	29	5	12	24	.254	.310	.359	.669
25	Red Sox	9	World Series	79	.628	49	29	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