players with the best era as a pitcher in a season with the houston astros with a minimum of 1 inning pitched per team game

Nolan Ryan has the best ERA for the Astros when he has had 1 or more (IP/TM GMS) in a season, with an ERA of 1.69 in 1981.

	NAME	ERA	IP	TM GMS	IP/TM GMS	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	Nolan Ryan N. Ryan	1.69	149.0	110	1.35	1981	HOU	21	11	5	.688	21	140	5	3	0	99	28	34	2	68	1	0	1	605	16	8.46	4.11	2.06	0.12	23.1	11.2	1.12	.246	2.05	52	2.28	70	5.98	16.5
2	Justin Verlander J. Verlander	1.75	175.0	162	1.08	2022	HOU	28	18	4	.818	28	185	0	0	0	116	34	43	12	29	6	0	0	666	3	9.51	1.49	6.38	0.62	27.8	4.4	0.83	.240	2.21	46	2.48	64	5.97	27.7
3	Roger Clemens R. Clemens	1.87	211.1	163	1.3	2005	HOU	32	13	8	.619	32	185	1	0	0	151	44	51	11	62	3	0	5	838	3	7.88	2.64	2.98	0.47	22.1	7.4	1.01	.243	2.17	44	2.86	67	6.43	33.4
4	Hunter Brown H. Brown	1.88	91.0	77	1.18	2025	HOU	15	8	3	.727	15	109	1	0	0	56	19	20	8	28	3	0	0	345	0	10.78	2.77	3.89	0.79	31.6	8.1	0.92	.244	1.98	48	2.83	70	5.54	12.1
5	Bob Knepper B. Knepper	2.18	156.2	110	1.42	1981	HOU	22	9	5	.643	22	75	6	5	0	128	38	41	5	38	4	0	1	617	0	4.31	2.18	1.97	0.29	12.2	6.2	1.06	.248	2.36	67	2.86	88	7.35	6.7
6	Danny Darwin D. Darwin	2.21	162.2	162	1	1990	HOU	48	11	4	.733	17	109	3	0	2	136	40	42	11	31	4	14	4	646	0	6.03	1.72	3.52	0.61	16.9	4.8	1.03	.255	2.32	61	2.98	83	7.52	11.3
7	Mike Cuellar M. Cuellar	2.22	227.1	163	1.39	1966	HOU	38	12	10	.545	28	175	11	1	2	193	56	79	10	52	0	6	8	913	9	6.93	2.06	3.37	0.40	19.2	5.7	1.08	.271	3.13	63	2.27	67	7.64	28.6
8	Mike Scott M. Scott	2.22	275.1	162	1.7	1986	HOU	37	18	10	.643	37	306	7	5	0	182	68	73	17	72	2	0	6	1,065	3	10.00	2.35	4.25	0.56	28.7	6.8	0.92	.247	2.39	63	2.15	61	5.95	43.6
9	Larry Dierker L. Dierker	2.33	305.1	162	1.88	1969	HOU	39	20	13	.606	37	232	20	4	0	240	79	97	18	72	1	0	6	1,207	9	6.84	2.12	3.22	0.53	19.2	6.0	1.02	.251	2.86	67	2.47	74	7.07	30.1
10	Andy Pettitte A. Pettitte	2.39	222.1	163	1.36	2005	HOU	33	17	9	.654	33	171	0	0	0	188	59	66	17	41	3	0	0	875	2	6.92	1.66	4.17	0.69	19.5	4.7	1.03	.266	2.67	57	3.06	71	7.61	30.2
11	Don Wilson D. Wilson	2.45	268.0	162	1.65	1971	HOU	35	16	10	.615	34	180	18	3	0	195	73	80	15	79	7	0	3	1,067	5	6.04	2.65	2.28	0.50	16.9	7.4	1.02	.229	2.69	72	2.79	84	6.55	15.3
12	Joe Niekro J. Niekro	2.47	270.0	162	1.67	1982	HOU	35	17	12	.586	35	130	16	5	0	224	74	79	12	64	5	0	1	1,067	19	4.33	2.13	2.03	0.40	12.2	6.0	1.07	.248	2.63	73	3.09	92	7.47	7.6
13	Dallas Keuchel D. Keuchel	2.48	232.0	162	1.43	2015	HOU	33	20	8	.714	33	216	3	2	0	185	64	68	17	51	2	0	0	911	9	8.38	1.98	4.24	0.66	23.7	5.6	1.02	.269	2.64	64	2.90	73	7.18	28.3
14	Gerrit Cole G. Cole	2.50	212.1	162	1.31	2019	HOU	33	20	5	.800	33	326	0	0	0	142	59	66	29	48	3	0	0	817	4	13.82	2.03	6.79	1.23	39.9	5.9	0.89	.275	2.80	55	2.63	58	6.02	45
15	Justin Verlander J. Verlander	2.52	214.0	162	1.32	2018	HOU	34	16	9	.640	34	290	1	1	0	156	60	63	28	37	8	0	0	833	5	12.20	1.56	7.84	1.18	34.8	4.4	0.90	.272	2.65	62	2.78	67	6.56	33
16	Ken Forsch K. Forsch	2.53	188.1	162	1.16	1971	HOU	33	8	8	.500	23	131	7	2	0	162	53	60	8	53	4	4	5	771	8	6.26	2.53	2.47	0.38	17.0	6.9	1.14	.268	2.87	75	2.52	76	7.74	16.7
17	Darryl Kile D. Kile	2.57	255.2	162	1.58	1997	HOU	34	19	7	.731	34	205	6	4	0	208	73	87	19	94	10	0	2	1,056	7	7.22	3.31	2.18	0.67	19.4	8.9	1.18	.260	3.06	65	3.68	93	7.32	8.2
18	Justin Verlander J. Verlander	2.58	223.0	162	1.38	2019	HOU	34	21	6	.778	34	300	2	1	0	137	64	66	36	42	6	0	0	847	4	12.11	1.70	7.14	1.45	35.4	5.0	0.80	.218	2.66	57	3.26	72	5.53	31.5
19	Don Sutton D. Sutton	2.61	158.2	110	1.44	1981	HOU	23	11	9	.550	23	104	6	3	0	132	46	51	6	29	1	0	3	624	0	5.90	1.64	3.59	0.34	16.7	4.6	1.01	.260	2.89	80	2.34	72	7.49	16.4
20	Ken Johnson K. Johnson	2.65	224.0	162	1.38	1963	HOU	37	11	17	.393	32	148	6	1	1	204	66	86	12	50	8	4	4	919	1	5.95	2.01	2.96	0.48	16.1	5.4	1.13	.274	3.46	85	2.63	85	8.20	11.8
21	Don Wilson D. Wilson	2.68	228.1	153	1.49	1972	HOU	33	15	10	.600	33	172	13	3	0	196	68	79	16	66	2	0	2	927	11	6.78	2.60	2.61	0.63	18.6	7.1	1.15	.268	3.11	80	2.69	83	7.73	13.6
22	Pete Harnisch P. Harnisch	2.70	216.2	162	1.34	1991	HOU	33	12	9	.571	33	172	4	2	0	169	65	71	14	83	5	0	3	900	5	7.14	3.45	2.07	0.58	19.1	9.2	1.16	.248	2.95	76	3.32	93	7.02	5.5
23	J.R. Richard	2.71	292.1	162	1.8	1979	HOU	38	18	13	.581	38	313	19	4	0	220	88	98	13	98	3	0	5	1,175	19	9.64	3.02	3.19	0.40	26.6	8.3	1.09	.277	3.02	78	2.19	62	6.77	45.6
24	Mike Cuellar M. Cuellar	2.74	170.2	162	1.05	1968	HOU	28	8	11	.421	24	133	11	2	1	152	52	60	8	45	1	3	7	700	2	7.01	2.37	2.96	0.42	19.0	6.4	1.15	.281	3.16	94	2.24	81	8.02	10
25	J.R. Richard	2.75	291.0	162	1.8	1976	HOU	39	20	15	.571	39	214	14	3	0	221	89	105	14	151	4	0	4	1,218	13	6.62	4.67	1.42	0.43	17.6	12.4	1.28	.248	3.25	84	3.38	101	6.84	-1.8