The Seattle Mariners have 4.66 runs allowed per game pitched all-time.

	TEAM	R/G	R	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Mariners	5.28	855	162	1977	.395	64	98	162	4.83	785	18	1	31	1433.0	1,508	769	194	578	61	41	6,282	51	4.93	3.63	1.36	1.22	12.5	9.2	1.46	.282	5.37	9.47
2	Mariners	5.21	834	160	1978	.350	56	104	160	4.67	630	28	4	20	1419.1	1,540	737	155	567	41	39	6,241	31	3.99	3.60	1.11	0.98	10.1	9.1	1.48	.286	5.29	9.77
3	Mariners	5.06	820	162	1979	.414	67	95	162	4.58	736	37	5	26	1438.0	1,567	731	165	571	33	74	6,314	43	4.61	3.57	1.29	1.03	11.7	9.0	1.49	.292	5.13	9.81
4	Mariners	4.87	793	163	1980	.364	59	103	163	4.38	703	31	3	26	1457.1	1,565	709	159	540	27	94	6,330	31	4.34	3.33	1.30	0.98	11.1	8.5	1.44	.287	4.90	9.66
5	Mariners	4.74	521	110	1981	.404	44	65	110	4.23	478	10	2	23	997.1	1,039	469	76	360	16	26	4,274	40	4.31	3.25	1.33	0.69	11.2	8.4	1.40	.288	4.70	9.38
6	Mariners	4.4	712	162	1982	.469	76	86	162	3.88	1,002	23	8	39	1476.1	1,431	636	173	547	25	23	6,251	47	6.11	3.33	1.83	1.05	16.0	8.8	1.34	.279	4.34	8.72
7	Mariners	4.57	740	162	1983	.370	60	102	162	4.12	910	25	7	39	1418.1	1,455	649	145	544	40	46	6,094	48	5.77	3.45	1.67	0.92	14.9	8.9	1.41	.294	4.70	9.23
8	Mariners	4.78	774	162	1984	.457	74	88	162	4.31	972	26	4	35	1442.0	1,497	690	138	619	40	53	6,302	47	6.07	3.86	1.57	0.86	15.4	9.8	1.47	.300	4.83	9.34
9	Mariners	5.05	818	162	1985	.457	74	88	162	4.68	868	23	5	30	1432.0	1,456	744	154	637	41	54	6,260	61	5.46	4.00	1.36	0.97	13.9	10.2	1.46	.286	5.14	9.15
10	Mariners	5.15	835	162	1986	.414	67	95	162	4.65	944	33	3	27	1439.2	1,590	744	171	585	49	27	6,345	46	5.90	3.66	1.61	1.07	14.9	9.2	1.51	.309	5.22	9.94
11	Mariners	4.94	801	162	1987	.481	78	84	162	4.49	919	39	6	33	1430.2	1,503	713	199	497	28	19	6,167	47	5.78	3.13	1.85	1.25	14.9	8.1	1.40	.288	5.04	9.46
12	Mariners	4.62	744	161	1988	.422	68	93	161	4.15	981	28	8	28	1428.0	1,385	659	144	558	36	57	6,092	50	6.18	3.52	1.76	0.91	16.1	9.2	1.36	.284	4.69	8.73
13	Mariners	4.49	728	162	1989	.451	73	89	162	4.00	897	15	5	44	1438.0	1,422	639	114	560	42	44	6,187	47	5.61	3.50	1.60	0.71	14.5	9.1	1.38	.286	4.56	8.90
14	Mariners	4.2	680	162	1990	.475	77	85	162	3.69	1,064	21	4	41	1443.1	1,319	592	120	606	41	55	6,165	69	6.63	3.78	1.76	0.75	17.3	9.8	1.33	.277	4.24	8.22
15	Mariners	4.16	674	162	1991	.512	83	79	162	3.79	1,003	10	5	48	1464.1	1,387	616	136	628	47	50	6,261	82	6.16	3.86	1.60	0.84	16.0	10.0	1.38	.281	4.14	8.52
16	Mariners	4.93	799	162	1992	.395	64	98	162	4.55	894	21	7	30	1445.0	1,467	730	129	661	60	50	6,349	61	5.57	4.12	1.35	0.80	14.1	10.4	1.47	.291	4.98	9.14
17	Mariners	4.51	731	162	1993	.506	82	80	162	4.20	1,083	22	5	41	1453.2	1,421	678	135	605	66	56	6,254	57	6.71	3.75	1.79	0.84	17.3	9.7	1.39	.295	4.53	8.80
18	Mariners	5.5	616	112	1994	.438	49	63	112	4.99	763	13	4	21	984.0	1,051	546	109	486	28	39	4,411	41	6.98	4.45	1.57	1.00	17.3	11.0	1.56	.311	5.63	9.61
19	Mariners	4.88	708	145	1995	.545	79	66	145	4.50	1,068	9	3	39	1289.1	1,343	644	149	591	47	37	5,743	50	7.46	4.13	1.81	1.04	18.6	10.3	1.50	.307	4.94	9.37
20	Mariners	5.56	895	161	1996	.528	85	76	161	5.21	1,000	4	2	34	1431.2	1,562	829	216	605	60	52	6,351	37	6.29	3.80	1.65	1.36	15.7	9.5	1.51	.301	5.63	9.82
21	Mariners	5.14	833	162	1997	.556	90	72	162	4.78	1,207	9	3	38	1447.2	1,500	769	192	598	66	36	6,368	57	7.50	3.72	2.02	1.19	19.0	9.4	1.45	.304	5.18	9.33
22	Mariners	5.31	855	161	1998	.472	76	85	161	4.93	1,156	17	5	31	1424.1	1,530	781	196	528	60	23	6,271	61	7.30	3.34	2.19	1.24	18.4	8.4	1.44	.308	5.40	9.67
23	Mariners	5.59	905	162	1999	.488	79	83	162	5.24	980	7	2	40	1433.2	1,613	834	191	684	71	39	6,471	63	6.15	4.29	1.43	1.20	15.1	10.6	1.60	.313	5.68	10.13
24	Mariners	4.81	780	162	2000	.562	91	71	162	4.49	998	4	4	44	1441.2	1,442	720	167	634	38	37	6,269	43	6.23	3.96	1.57	1.04	15.9	10.1	1.44	.288	4.87	9.00
25	Mariners	3.87	627	162	2001	.716	116	46	162	3.54	1,051	8	4	56	1465.0	1,293	576	160	465	64	28	6,096	40	6.46	2.86	2.26	0.98	17.2	7.6	1.20	.260	3.85	7.94
	Total	4.66	35,415	7,606		.477	3,629	3,975	7,606	4.29	49,985	587	152	1,828	67794.0	67,646	32,310	8,043	25,243	2,395	1,792	291,505	2,535	6.64	3.35	1.98	1.07	17.1	8.7	1.37	.290	4.70	8.98