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

Mark Melancon had the lowest ERA for the Astros with 50.0+ innings pitched in 2011, with an ERA of 2.78 in his rookie season.

	NAME	ERA	IP	SEASON	TM	G	W	L	W%	GS	SO	CG	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	Mark Melancon M. Melancon	2.78	74.1	2011	HOU	71	8	4	.667	0	66	0	20	65	23	28	5	26	2	47	6	309	1	7.99	3.15	2.54	0.61	21.4	8.4	1.22	.286	3.39	74	3.25	84	7.87	5.2
2	Wilton Lopez W. Lopez	2.79	71.0	2011	HOU	73	2	6	.250	0	56	0	0	72	22	26	6	18	3	13	3	298	1	7.10	2.28	3.11	0.76	18.8	6.0	1.27	.307	3.30	74	3.43	88	9.13	3.6
3	Wandy Rodriguez W. Rodriguez	3.49	191.0	2011	HOU	30	11	11	.500	30	166	0	0	182	74	81	25	69	5	0	7	808	5	7.82	3.25	2.41	1.18	20.5	8.5	1.31	.289	3.82	92	4.14	107	8.58	-5.4
4	Bud Norris B. Norris	3.77	186.0	2011	HOU	31	6	11	.353	31	176	0	0	177	78	93	24	70	5	0	7	795	3	8.52	3.39	2.51	1.16	22.1	8.8	1.33	.294	4.50	100	4.01	103	8.56	-2.6
5	Fernando Rodriguez Jr. F. Rodriguez Jr.	3.96	52.1	2011	HOU	47	2	3	.400	0	57	0	0	51	23	24	6	30	3	11	5	231	2	9.80	5.16	1.90	1.03	24.7	13.0	1.55	.333	4.13	105	4.22	109	8.77	-1.9
6	Brett Myers B. Myers	4.46	216.0	2011	HOU	34	7	14	.333	33	160	2	0	226	107	116	31	57	4	1	5	917	7	6.67	2.38	2.81	1.29	17.4	6.2	1.31	.293	4.83	118	4.25	109	9.42	-8.6
7	Enerio Del Rosario E. Del Rosario	4.58	53.0	2011	HOU	54	0	3	.000	0	31	0	0	59	27	30	3	31	3	13	3	250	2	5.26	5.26	1.00	0.51	12.4	12.4	1.70	.308	5.09	122	4.51	116	10.02	-3.6
8	Henry Sosa H. Sosa	5.23	53.1	2011	HOU	10	3	5	.375	10	38	0	0	54	31	31	7	23	3	0	1	231	3	6.41	3.88	1.65	1.18	16.5	10.0	1.44	.294	5.23	139	4.76	123	9.11	-5.1
9	Aneury Rodriguez A. Rodriguez	5.27	85.1	2011	HOU	43	1	6	.143	8	64	0	0	83	50	57	13	32	2	16	3	369	3	6.75	3.38	2.00	1.37	17.3	8.7	1.35	.271	6.01	140	4.69	121	8.75	-7.6
10	J.A. Happ	5.35	156.1	2011	HOU	28	6	15	.286	28	134	0	0	157	93	103	21	83	2	0	5	698	3	7.71	4.78	1.61	1.21	19.2	11.9	1.54	.297	5.93	142	4.68	121	9.04	-13.7
11	Jordan Lyles J. Lyles	5.36	94.0	2011	HOU	20	2	8	.200	15	67	0	0	107	56	61	14	26	5	2	1	415	0	6.41	2.49	2.58	1.34	16.1	6.3	1.41	.307	5.84	142	4.52	116	10.24	-6.5