The Colorado Rockies have an ERA of 5.05 all-time.

	TEAM	ERA	SEAS	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Rockies	5.41	1	1993	162	.414	67	95	162	913	9	0	35	1431.1	1,664	860	967	181	609	41	66	6,471	82	5.74	3.83	1.50	1.14	14.1	9.4	1.59	.314	6.08	10.46
2	Rockies	5.15	1	1994	117	.453	53	64	117	703	4	1	28	1031.0	1,185	590	638	120	448	49	43	4,644	50	6.14	3.91	1.57	1.05	15.1	9.6	1.58	.320	5.57	10.34
3	Rockies	4.97	1	1995	144	.535	77	67	144	891	1	0	43	1288.1	1,443	711	783	160	512	41	31	5,706	62	6.22	3.58	1.74	1.12	15.6	9.0	1.52	.313	5.47	10.08
4	Rockies	5.59	1	1996	162	.512	83	79	162	932	5	1	34	1422.2	1,597	884	964	198	624	69	19	6,391	66	5.90	3.95	1.49	1.25	14.6	9.8	1.56	.306	6.10	10.10
5	Rockies	5.25	1	1997	162	.512	83	79	162	870	9	3	38	1432.2	1,697	836	908	196	566	67	23	6,417	50	5.47	3.56	1.54	1.23	13.6	8.8	1.58	.318	5.70	10.66
6	Rockies	4.99	1	1998	162	.475	77	85	162	951	9	2	36	1432.2	1,583	794	855	174	562	63	17	6,277	47	5.97	3.53	1.69	1.09	15.2	9.0	1.50	.311	5.37	9.94
7	Rockies	6.01	1	1999	162	.444	72	90	162	1,032	12	1	33	1429.0	1,700	955	1,028	237	737	60	46	6,574	70	6.50	4.64	1.40	1.49	15.7	11.2	1.71	.325	6.47	10.71
8	Rockies	5.26	1	2000	162	.506	82	80	162	1,001	7	1	33	1430.0	1,568	835	897	221	588	72	72	6,340	40	6.30	3.70	1.70	1.39	15.8	9.3	1.51	.302	5.65	9.87
9	Rockies	5.29	1	2001	162	.451	73	89	162	1,058	8	4	26	1430.0	1,522	841	906	239	598	64	71	6,306	38	6.66	3.76	1.77	1.50	16.8	9.5	1.48	.295	5.70	9.58
10	Rockies	5.20	1	2002	162	.451	73	89	162	920	1	0	43	1426.2	1,554	825	898	225	582	64	49	6,345	42	5.80	3.67	1.58	1.42	14.5	9.2	1.50	.292	5.66	9.80
11	Rockies	5.20	1	2003	162	.457	74	88	162	866	3	0	34	1420.0	1,629	821	892	200	552	84	51	6,364	48	5.49	3.50	1.57	1.27	13.6	8.7	1.54	.307	5.65	10.32
12	Rockies	5.54	1	2004	162	.420	68	94	162	947	3	0	36	1435.1	1,634	883	923	198	697	71	84	6,535	66	5.94	4.37	1.36	1.24	14.5	10.7	1.62	.311	5.79	10.25
13	Rockies	5.13	1	2005	162	.414	67	95	162	981	4	1	37	1418.2	1,600	808	862	175	604	84	54	6,385	65	6.22	3.83	1.62	1.11	15.4	9.5	1.55	.314	5.47	10.15
14	Rockies	4.66	1	2006	162	.469	76	86	162	952	5	4	34	1447.1	1,549	749	812	155	553	66	81	6,318	43	5.92	3.44	1.72	0.96	15.1	8.8	1.45	.304	5.05	9.63
15	Rockies	4.32	1	2007	163	.552	90	73	163	967	4	1	39	1472.0	1,497	706	758	164	504	59	61	6,293	35	5.91	3.08	1.92	1.00	15.4	8.0	1.36	.290	4.63	9.15
16	Rockies	4.77	1	2008	162	.457	74	88	162	1,041	3	1	36	1446.0	1,547	766	822	148	562	53	49	6,338	61	6.48	3.50	1.85	0.92	16.4	8.9	1.46	.309	5.12	9.63
17	Rockies	4.22	1	2009	162	.568	92	70	162	1,154	5	2	45	1438.1	1,427	675	715	141	528	46	51	6,171	48	7.22	3.30	2.19	0.88	18.7	8.6	1.36	.299	4.47	8.93
18	Rockies	4.14	1	2010	162	.512	83	79	162	1,234	6	2	35	1442.0	1,405	663	717	139	525	56	54	6,143	77	7.70	3.28	2.35	0.87	20.1	8.5	1.34	.302	4.48	8.77
19	Rockies	4.43	1	2011	162	.451	73	89	162	1,118	5	2	41	1447.2	1,471	713	774	176	522	48	47	6,215	65	6.95	3.25	2.14	1.09	18.0	8.4	1.38	.298	4.81	9.15
20	Rockies	5.22	1	2012	162	.395	64	98	162	1,144	0	0	36	1422.0	1,637	824	890	198	566	47	61	6,384	94	7.24	3.58	2.02	1.25	17.9	8.9	1.55	.325	5.63	10.36
21	Rockies	4.44	1	2013	162	.457	74	88	162	1,064	1	0	35	1436.0	1,545	708	760	136	517	40	52	6,248	62	6.67	3.24	2.06	0.85	17.0	8.3	1.44	.314	4.76	9.68
22	Rockies	4.84	1	2014	162	.407	66	96	162	1,074	1	1	24	1431.0	1,528	770	818	173	531	54	32	6,248	72	6.75	3.34	2.02	1.09	17.2	8.5	1.44	.307	5.14	9.61
23	Rockies	5.04	1	2015	162	.420	68	94	162	1,112	4	1	36	1426.1	1,579	799	844	183	579	48	42	6,308	66	7.02	3.65	1.92	1.15	17.6	9.2	1.51	.318	5.33	9.96
24	Rockies	4.91	1	2016	162	.463	75	87	162	1,223	2	2	37	1429.1	1,532	779	860	181	547	70	38	6,289	72	7.70	3.44	2.24	1.14	19.4	8.7	1.45	.317	5.42	9.65
25	Rockies	4.51	1	2017	162	.537	87	75	162	1,270	1	1	47	1437.2	1,453	721	757	190	532	50	20	6,177	69	7.95	3.33	2.39	1.19	20.6	8.6	1.38	.305	4.74	9.10
	Total	5.05	33		5,182	.456	2,364	2,818	5,182	34,280	118	34	1,169	45801.2	49,867	25,678	27,680	6,131	18,245	1,962	1,351	202,088	1,954	6.74	3.59	1.88	1.20	17.0	9.0	1.49	.309	5.44	9.80