lowest earned run average with at least 50 innings pitched in 2011 as a rockie

Rafael Betancourt had the lowest ERA for the Rockies with 50.0+ innings pitched in 2011, with an ERA of 2.89.

	NAME	ERA	IP	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Rafael Betancourt R. Betancourt	2.89	62.1	2011	COL	68	2	0	1.000	0	73	0	0	8	46	20	21	7	8	0	24	0	237	1	10.54	1.16	9.13	1.01	30.8	3.4	0.87	.262	3.03	66	2.52	61	6.64	10.5
2	Matt Lindstrom M. Lindstrom	3.00	54.0	2011	COL	63	2	2	.500	0	36	0	0	2	52	18	21	3	14	2	16	4	226	2	6.00	2.33	2.57	0.50	15.9	6.2	1.22	.287	3.50	68	3.30	80	8.67	4.7
3	Matt Belisle M. Belisle	3.25	72.0	2011	COL	74	10	4	.714	0	58	0	0	0	77	26	33	5	14	4	10	3	301	2	7.25	1.75	4.14	0.63	19.3	4.7	1.26	.327	4.13	74	3.06	74	9.63	8.1
4	Jorge De La Rosa J. De La Rosa	3.51	59.0	2011	COL	10	5	2	.714	10	52	1	0	0	48	23	25	4	22	2	0	0	245	6	7.93	3.36	2.36	0.61	21.2	9.0	1.19	.267	3.81	80	3.36	82	7.32	4.8
5	Jhoulys Chacin J. Chacin	3.62	194.0	2011	COL	31	11	14	.440	31	150	2	1	0	168	78	87	20	87	4	0	1	827	7	6.96	4.04	1.72	0.93	18.1	10.5	1.31	.261	4.04	83	4.22	103	7.79	-1.6
6	Clayton Mortensen C. Mortensen	3.86	58.1	2011	COL	16	2	4	.333	6	30	0	0	0	55	25	30	9	24	2	6	2	244	3	4.63	3.70	1.25	1.39	12.3	9.8	1.35	.257	4.63	88	5.33	130	8.49	-7.2
7	Huston Street H. Street	3.86	58.1	2011	COL	62	1	4	.200	0	55	0	0	29	62	25	28	10	9	1	47	1	239	0	8.49	1.39	6.11	1.54	23.0	3.8	1.22	.317	4.32	88	3.88	94	9.57	1.6
8	Kevin Millwood K. Millwood	3.98	54.1	2011	COL	9	4	3	.571	9	36	0	0	0	58	24	26	9	8	0	0	0	222	2	5.96	1.33	4.50	1.49	16.2	3.6	1.21	.290	4.31	91	4.29	104	9.61	-0.8
9	Matt Reynolds M. Reynolds	4.09	50.2	2011	COL	73	1	2	.333	0	50	0	0	0	48	23	24	10	18	0	9	5	211	5	8.88	3.20	2.78	1.78	23.7	8.5	1.30	.286	4.26	93	4.68	114	8.53	-2.8
10	Juan Nicasio J. Nicasio	4.14	71.2	2011	COL	13	4	4	.500	13	58	0	0	0	73	33	35	8	18	1	0	3	299	1	7.28	2.26	3.22	1.00	19.4	6.0	1.27	.304	4.40	95	3.65	89	9.17	3.7
11	Ubaldo Jimenez U. Jimenez	4.46	123.0	2011	COL	21	6	9	.400	21	118	2	1	0	118	61	68	10	51	7	0	5	532	6	8.63	3.73	2.31	0.73	22.2	9.6	1.37	.312	4.98	102	3.57	87	8.63	7.3
12	Jason Hammel J. Hammel	4.76	170.1	2011	COL	32	7	13	.350	27	94	0	0	1	175	90	100	21	68	6	2	3	739	8	4.97	3.59	1.38	1.11	12.7	9.2	1.43	.280	5.28	108	4.82	117	9.25	-12.1
13	Aaron Cook A. Cook	6.03	97.0	2011	COL	18	3	10	.231	17	48	0	0	0	127	65	67	9	37	5	0	5	441	3	4.45	3.43	1.30	0.84	10.9	8.4	1.69	.345	6.22	138	4.53	110	11.78	-4
14	Esmil Rogers E. Rogers	7.05	83.0	2011	COL	18	6	6	.500	13	63	0	0	0	110	65	65	14	47	6	1	5	404	5	6.83	5.10	1.34	1.52	15.6	11.6	1.89	.350	7.05	161	5.61	136	11.93	-12.7