how many mariners players have finished over.300 for a season

Glenn Abbott was 26 years old for the Mariners in 1977.

Interpreted as:

How many mariners players have finished over.300 years old for a season?

	NAME	AGE	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Glenn Abbott G. Abbott	26	1977	SEA
2	Jose Baez J. Baez	23	1977	SEA	91	305	39	79	14	1	1	17	19	1	20	6	1	333	98	16	8	0	1	6	.259	.305	.321	.626	28	-10.6	.284	70	-12
3	Juan Bernhardt J. Bernhardt	23	1977	SEA	89	305	32	74	9	2	7	30	5	2	26	2	3	317	108	18	4	1	0	9	.243	.259	.354	.613	24	-13.3	.271	61	-14.6
4	Steve Braun S. Braun	29	1977	SEA	139	451	51	106	19	1	5	31	80	2	59	8	3	544	142	25	8	3	2	14	.235	.351	.315	.666	58	-5.5	.311	88	-7.8
5	Steve Burke S. Burke	22	1977	SEA
6	Dave Collins D. Collins	24	1977	SEA	120	402	46	96	9	3	5	28	33	3	66	25	10	447	126	17	6	3	0	2	.239	.299	.313	.613	37	-15.4	.280	67	-17.3
7	Larry Cox L. Cox	29	1977	SEA	35	93	6	23	6	0	2	6	10	0	12	1	1	104	35	8	1	0	0	2	.247	.320	.376	.697	11	-0.7	.315	91	-1.2
8	Julio Cruz J. Cruz	22	1977	SEA	60	199	25	51	3	1	1	7	24	0	29	15	6	230	59	5	7	0	1	2	.256	.336	.296	.633	21	-5.4	.294	77	-6.4
9	Puchy Delgado P. Delgado	23	1977	SEA	13	22	4	4	0	0	0	2	1	0	8	0	0	23	4	0	0	0	0	0	.182	.217	.182	.399	0	-2.5	.188	5	-2.6
10	Greg Erardi G. Erardi	23	1977	SEA
11	Ray Fosse R. Fosse	30	1977	SEA	11	34	3	12	3	0	0	5	2	0	2	0	1	36	15	3	0	0	0	2	.353	.389	.441	.830	6	1.4	.372	129	1.2
12	Bob Galasso B. Galasso	25	1977	SEA
13	Rick Honeycutt R. Honeycutt	23	1977	SEA
14	Tom House T. House	30	1977	SEA
15	Rick Jones R. Jones	22	1977	SEA
16	Ruppert Jones R. Jones	22	1977	SEA	160	597	85	157	26	8	24	76	55	2	120	13	9	663	271	58	3	6	3	7	.263	.324	.454	.778	86	8.9	.341	108	6.1
17	Skip Jutze S. Jutze	31	1977	SEA	42	109	10	24	2	0	3	15	7	0	12	0	4	118	35	5	2	0	1	3	.220	.267	.321	.588	8	-5.7	.263	55	-6.2
18	Mike Kekich M. Kekich	32	1977	SEA
19	Bill Laxton B. Laxton	29	1977	SEA
20	Joe Lis J. Lis	30	1977	SEA	9	13	1	3	0	0	0	1	1	0	2	0	0	14	3	0	0	0	0	3	.231	.286	.231	.516	1	-0.9	.244	43	-0.9
21	Carlos Lopez C. Lopez	28	1977	SEA	99	297	39	84	18	1	8	34	14	3	61	16	4	319	128	27	2	3	1	0	.283	.319	.431	.750	39	1.5	.330	100	0.1
22	Frank MacCormack F. MacCormack	22	1977	SEA
23	Byron McLaughlin B. McLaughlin	21	1977	SEA
24	Tom McMillan T. McMillan	25	1977	SEA	2	5	0	0	0	0	0	0	0	0	0	0	0	5	0	0	0	0	0	0	.000	.000	.000	.000	-1	-1.3	.000	-122	-1.3
25	Doc Medich D. Medich	28	1977	SEA