The Washington Nationals have a record of 20-12 against the Mariners all-time.

	TEAM	DATE	REC	TM		OPP	RESULT	W%	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Expos	6/10/2003	1-0	MON	@	SEA	W 7-3	1.000	36	7	11	1	0	2	7	2	0	5	0	1	38	18	3	0	0	0	1	.306	.342	.500	.842
2	Expos	6/11/2003	1-0	MON	@	SEA	W 3-1	1.000	32	3	9	2	0	0	3	2	0	4	1	0	37	11	2	2	1	0	1	.281	.314	.344	.658
3	Expos	6/12/2003	0-1	MON	@	SEA	L 0-1	.000	29	0	5	0	0	0	0	3	0	7	0	0	34	5	0	2	0	0	0	.172	.250	.172	.422
4	Expos	6/11/2004	0-1	MON	@	SEA	L 0-1	.000	30	0	5	1	0	0	0	3	0	5	0	0	34	6	1	1	0	0	1	.167	.242	.200	.442
5	Expos	6/12/2004	0-1	MON	@	SEA	L 0-3	.000	33	0	8	0	0	0	0	1	0	7	0	1	34	8	0	0	0	0	0	.242	.265	.242	.507
6	Expos	6/13/2004	0-1	MON	@	SEA	L 1-8	.000	32	1	6	0	0	1	1	1	0	9	1	0	33	9	1	0	0	0	1	.188	.212	.281	.493
7	Nationals	6/10/2005	1-0	WSH	vs	SEA	W 9-3	1.000	30	9	10	1	1	0	9	8	0	1	0	0	40	13	2	2	0	1	2	.333	.474	.433	.907
8	Nationals	6/11/2005	1-0	WSH	vs	SEA	W 2-1	1.000	26	2	7	1	1	0	2	6	2	6	1	1	36	10	2	2	0	0	1	.269	.441	.385	.826
9	Nationals	6/12/2005	1-0	WSH	vs	SEA	W 3-2	1.000	30	3	6	2	0	1	3	4	0	8	1	0	34	11	3	0	0	1	1	.200	.294	.367	.661
10	Nationals	6/13/2008	1-0	WSH	@	SEA	W 7-6	1.000	37	7	10	1	0	0	7	5	0	9	2	0	42	11	1	0	0	0	0	.270	.357	.297	.654
11	Nationals	6/14/2008	1-0	WSH	@	SEA	W 5-2	1.000	39	5	13	5	0	1	5	4	0	9	2	0	43	21	6	0	0	0	0	.333	.395	.538	.934
12	Nationals	6/15/2008	1-0	WSH	@	SEA	W 6-2	1.000	36	6	12	5	0	1	6	4	1	4	2	1	43	20	6	1	1	0	1	.333	.405	.556	.960
13	Nationals	6/21/2011	1-0	WSH	vs	SEA	W 6-5	1.000	31	6	7	0	0	1	6	2	1	3	0	0	34	10	1	0	0	0	3	.226	.294	.323	.617
14	Nationals	6/22/2011	1-0	WSH	vs	SEA	W 2-1	1.000	30	2	5	0	0	0	2	2	0	12	0	0	32	5	0	0	0	0	0	.167	.219	.167	.385
15	Nationals	6/23/2011	1-0	WSH	vs	SEA	W 1-0	1.000	31	1	6	2	0	0	1	2	0	10	0	0	35	8	2	1	1	0	0	.194	.235	.258	.493
16	Nationals	8/29/2014	1-0	WSH	@	SEA	W 8-3	1.000	38	8	14	1	0	6	8	2	0	2	0	0	41	33	7	0	1	0	2	.368	.390	.868	1.259
17	Nationals	8/30/2014	1-0	WSH	@	SEA	W 3-1	1.000	34	3	8	1	0	1	3	2	0	9	0	0	36	12	2	0	0	1	2	.235	.278	.353	.631
18	Nationals	8/31/2014	0-1	WSH	@	SEA	L 3-5	.000	34	3	6	2	0	3	3	2	0	10	0	0	36	17	5	0	0	0	0	.176	.222	.500	.722
19	Nationals	5/23/2017	1-0	WSH	vs	SEA	W 10-1	1.000	36	10	15	1	1	4	10	2	0	4	0	0	38	30	6	0	0	0	2	.417	.447	.833	1.281
20	Nationals	5/24/2017	1-0	WSH	vs	SEA	W 5-1	1.000	29	5	7	1	0	1	5	4	0	2	3	0	35	11	2	1	1	2	1	.241	.324	.379	.703
21	Nationals	5/25/2017	0-1	WSH	vs	SEA	L 2-4	.000	33	2	6	2	0	1	2	3	0	7	0	1	36	11	3	0	0	0	0	.182	.250	.333	.583
22	Nationals	7/13/2022	0-1	WSH	vs	SEA	L 4-6	.000	35	4	10	2	0	1	4	3	1	3	0	0	40	15	3	0	1	1	0	.286	.350	.429	.779
23	Nationals	7/13/2022	0-1	WSH	vs	SEA	L 1-2	.000	29	1	6	1	0	1	1	5	0	6	0	1	34	10	2	0	0	0	3	.207	.324	.345	.668
24	Nationals	8/23/2022	0-1	WSH	@	SEA	L 2-4	.000	31	2	5	1	0	1	2	2	0	10	1	1	33	9	2	0	0	0	0	.161	.212	.290	.502
25	Nationals	8/24/2022	1-0	WSH	@	SEA	W 3-1	1.000	34	3	10	1	0	1	3	1	0	11	0	1	36	14	2	1	0	0	1	.294	.314	.412	.726
	Total		20-12					.625	1,044	123	260	43	3	36	122	90	7	215	21	10	1,163	417	82	13	9	6	29	.249	.310	.399	.710