The Oakland Athletics had a record of 4-15 against the Mariners in 2021.

	TEAM	DATE	REC	SEASON	TM		OPP	RESULT	W%	AB	R	H	2B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Athletics	5/24/2021	0-1	2021	OAK	vs	SEA	L 2-4	.000	30	2	5	1	1	2	4	0	9	0	0	34	9	2	0	0	0	2	.167	.265	.300	.565
2	Athletics	5/25/2021	0-1	2021	OAK	vs	SEA	L 3-4	.000	35	3	8	4	0	2	2	1	9	0	0	38	12	4	0	0	0	0	.229	.289	.343	.632
3	Athletics	5/26/2021	1-0	2021	OAK	vs	SEA	W 6-3	1.000	27	6	8	1	1	6	6	1	5	0	0	36	12	2	0	2	0	2	.296	.417	.444	.861
4	Athletics	5/31/2021	0-1	2021	OAK	@	SEA	L 5-6	.000	38	5	10	5	0	4	2	1	12	0	0	42	15	5	0	1	0	1	.263	.310	.395	.704
5	Athletics	6/1/2021	1-0	2021	OAK	@	SEA	W 12-6	1.000	38	12	13	5	2	12	6	1	9	0	0	46	24	7	0	1	0	0	.342	.435	.632	1.066
6	Athletics	6/2/2021	1-0	2021	OAK	@	SEA	W 6-0	1.000	37	6	10	2	1	6	1	0	7	0	0	38	15	3	0	0	0	0	.270	.289	.405	.695
7	Athletics	7/22/2021	1-0	2021	OAK	@	SEA	W 4-1	1.000	36	4	11	3	0	4	6	1	4	2	0	45	14	3	1	1	0	0	.306	.409	.389	.798
8	Athletics	7/23/2021	0-1	2021	OAK	@	SEA	L 3-4	.000	32	3	7	1	2	3	3	1	18	0	1	36	14	3	0	0	0	1	.219	.306	.438	.743
9	Athletics	7/24/2021	0-1	2021	OAK	@	SEA	L 4-5	.000	33	4	6	1	1	4	2	0	11	0	0	35	10	2	0	0	0	1	.182	.229	.303	.532
10	Athletics	7/25/2021	0-1	2021	OAK	@	SEA	L 3-4	.000	33	3	7	1	2	3	2	1	7	1	0	36	14	3	0	0	0	0	.212	.278	.424	.702
11	Athletics	8/23/2021	0-1	2021	OAK	vs	SEA	L 3-5	.000	32	3	6	1	2	3	1	0	4	2	0	33	13	3	0	0	0	1	.188	.212	.406	.618
12	Athletics	8/24/2021	0-1	2021	OAK	vs	SEA	L 1-5	.000	34	1	8	2	0	1	1	1	6	0	0	36	10	2	0	0	0	2	.235	.278	.294	.572
13	Athletics	9/20/2021	0-1	2021	OAK	vs	SEA	L 2-4	.000	32	2	7	2	0	2	1	0	10	0	0	34	9	2	1	0	0	1	.219	.242	.281	.524
14	Athletics	9/21/2021	0-1	2021	OAK	vs	SEA	L 2-5	.000	33	2	6	2	2	2	2	1	5	0	0	36	14	4	0	0	1	0	.182	.250	.424	.674
15	Athletics	9/22/2021	0-1	2021	OAK	vs	SEA	L 1-4	.000	30	1	4	1	1	1	2	0	9	0	0	32	8	2	0	0	0	0	.133	.188	.267	.454
16	Athletics	9/23/2021	0-1	2021	OAK	vs	SEA	L 5-6	.000	32	5	6	2	2	5	7	0	11	1	0	40	14	4	0	1	0	0	.188	.325	.438	.763
17	Athletics	9/27/2021	0-1	2021	OAK	@	SEA	L 4-13	.000	34	4	7	2	1	4	1	0	11	0	0	35	12	3	0	0	0	0	.206	.229	.353	.582
18	Athletics	9/28/2021	0-1	2021	OAK	@	SEA	L 2-4	.000	35	2	7	0	1	2	0	1	7	0	0	36	10	1	0	0	0	0	.200	.222	.286	.508
19	Athletics	9/29/2021	0-1	2021	OAK	@	SEA	L 2-4	.000	32	2	5	0	2	2	3	0	6	0	0	35	11	2	0	0	0	0	.156	.229	.344	.572
	Total		4-15						.211	633	70	141	36	21	68	52	10	160	6	1	703	240	57	2	6	1	11	.223	.290	.379	.669