lowest era- by a player in a season with at least 150 ip between 1956 to 1972

Between the 1956 and 1972 seasons, Bob Gibson had the lowest ERA- with 150.0+ innings pitched in a season, with an ERA- of 38 in 1968.

	NAME	ERA-	IP	SEASON	TM	G	W	L	W%	GS	ERA	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	FIP	FIP-	H/9	PRAA
1	Bob Gibson B. Gibson	38	304.2	1968	STL	34	22	9	.710	34	1.12	268	28	13	0	198	38	49	11	62	7	0	6	1,161	4	7.92	1.83	4.32	0.32	23.1	5.3	0.85	.230	1.45	1.77	63	5.85	34.8
2	Dean Chance D. Chance	48	278.1	1964	LAA	46	20	9	.690	35	1.65	207	15	11	4	194	51	56	7	86	2	7	9	1,093	9	6.69	2.78	2.41	0.23	18.9	7.9	1.01	.236	1.81	2.39	67	6.27	37.9
3	Roger Craig R. Craig	50	152.2	1959	LAD	29	11	5	.688	17	2.06	76	7	4	0	122	35	49	13	45	1	3	3	612	2	4.48	2.65	1.69	0.77	12.4	7.4	1.09	.229	2.89	3.56	88	7.19	8.5
4	Tom Seaver T. Seaver	52	286.1	1971	NYM	36	20	10	.667	35	1.76	289	21	4	0	210	56	61	18	61	4	1	2	1,103	5	9.08	1.92	4.74	0.57	26.2	5.5	0.95	.263	1.92	1.93	58	6.60	44.5
5	Sandy Koufax S. Koufax	53	323.0	1966	LAD	41	27	9	.750	41	1.73	317	27	5	0	241	62	74	19	77	0	0	4	1,274	7	8.83	2.15	4.12	0.53	24.9	6.0	0.98	.258	2.06	2.07	65	6.72	41.8
6	Luis Tiant L. Tiant	53	258.1	1968	CLE	34	21	9	.700	32	1.60	264	19	9	0	152	46	53	16	73	4	0	4	987	3	9.20	2.54	3.62	0.56	26.7	7.4	0.87	.216	1.85	2.04	64	5.30	33
7	Wilbur Wood W. Wood	53	334.0	1971	CWS	44	22	13	.629	42	1.91	210	22	7	1	272	71	95	21	62	7	2	2	1,316	6	5.66	1.67	3.39	0.57	16.0	4.7	1.00	.247	2.56	2.63	71	7.33	38.9
8	Sandy Koufax S. Koufax	53	223.0	1964	LAD	29	19	5	.792	28	1.74	223	15	7	1	154	43	49	13	53	0	1	5	870	9	9.00	2.14	4.21	0.52	25.6	6.1	0.93	.243	1.98	2.08	67	6.22	27.1
9	Joe Horlen J. Horlen	55	210.2	1964	CWS	32	13	9	.591	28	1.88	138	9	2	0	142	44	54	11	55	4	2	4	815	4	5.90	2.35	2.51	0.47	16.9	6.7	0.94	.216	2.31	2.81	79	6.07	18.3
10	Phil Niekro P. Niekro	55	207.0	1967	ATL	46	11	9	.550	20	1.87	129	10	1	9	164	43	64	9	55	7	20	3	827	19	5.61	2.39	2.35	0.39	15.6	6.7	1.06	.247	2.78	2.76	84	7.13	12.2
11	Hank Aguirre H. Aguirre	55	216.0	1962	DET	42	16	8	.667	22	2.21	156	11	2	3	162	53	67	14	65	5	13	7	877	4	6.50	2.71	2.40	0.58	17.8	7.4	1.05	.232	2.79	2.99	73	6.75	26.9
12	Steve Carlton S. Carlton	56	346.1	1972	PHI	41	27	10	.730	41	1.97	310	30	8	0	257	76	84	17	87	1	0	8	1,351	8	8.06	2.26	3.56	0.44	22.9	6.4	0.99	.256	2.18	2.00	59	6.68	53.5
13	Vida Blue V. Blue	56	312.0	1971	OAK	39	24	8	.750	39	1.82	301	24	8	0	209	63	73	19	88	4	0	3	1,207	10	8.68	2.54	3.42	0.55	24.9	7.3	0.95	.239	2.11	2.19	66	6.03	41.4
14	Whitey Ford W. Ford	56	219.1	1958	NYY	30	14	7	.667	29	2.01	145	15	7	1	174	49	62	14	62	3	1	3	872	5	5.95	2.54	2.34	0.57	16.6	7.1	1.08	.247	2.54	2.87	80	7.14	18.4
15	Luis Tiant L. Tiant	59	179.0	1972	BOS	43	15	6	.714	19	1.91	123	12	6	3	128	38	45	7	65	0	12	5	713	0	6.18	3.27	1.89	0.35	17.3	9.1	1.08	.234	2.26	2.62	77	6.44	14.9
16	Juan Marichal J. Marichal	59	299.2	1969	SFG	37	21	11	.656	36	2.10	205	27	8	0	244	70	90	15	54	6	1	7	1,176	5	6.16	1.62	3.80	0.45	17.4	4.6	0.99	.256	2.70	2.39	70	7.33	34.3
17	Sam McDowell S. McDowell	59	269.0	1968	CLE	38	15	14	.517	37	1.81	283	11	3	0	181	54	78	13	110	10	0	9	1,098	7	9.47	3.68	2.57	0.43	25.8	10.0	1.08	.246	2.61	2.25	70	6.06	28.3
18	Gaylord Perry G. Perry	60	342.2	1972	CLE	41	24	16	.600	40	1.92	234	29	5	1	253	73	79	17	82	12	1	16	1,345	11	6.15	2.15	2.85	0.45	17.4	6.1	0.98	.236	2.07	2.49	74	6.64	31.9
19	Dick Radatz D. Radatz	60	157.0	1964	BOS	79	16	9	.640	0	2.29	181	0	0	29	103	40	44	13	58	7	67	9	635	1	10.38	3.32	3.12	0.75	28.5	9.1	1.03	.239	2.52	2.62	65	5.90	23.2
20	Hoyt Wilhelm H. Wilhelm	60	226.0	1959	BAL	32	15	11	.577	27	2.19	139	13	3	0	178	55	64	13	77	10	2	3	902	5	5.54	3.07	1.81	0.52	15.4	8.5	1.13	.249	2.55	3.22	86	7.09	13.3
21	Gary Nolan G. Nolan	60	176.0	1972	CIN	25	15	5	.750	25	1.99	90	6	2	0	147	39	48	13	30	1	0	5	689	5	4.60	1.53	3.00	0.66	13.1	4.4	1.01	.241	2.45	2.86	90	7.52	6.4
22	Juan Marichal J. Marichal	60	295.1	1965	SFG	39	22	13	.629	37	2.13	240	24	10	1	224	70	78	27	46	4	2	4	1,153	2	7.31	1.40	5.22	0.82	20.8	4.0	0.91	.236	2.38	2.59	76	6.83	27.3
23	Steve Carlton S. Carlton	60	236.1	1969	STL	31	17	11	.607	31	2.17	210	12	2	0	185	57	66	15	93	4	0	6	968	7	8.00	3.54	2.26	0.57	21.7	9.6	1.18	.263	2.51	2.78	81	7.05	17.4
24	Bob Gibson B. Gibson	61	314.0	1969	STL	35	20	13	.606	35	2.18	269	28	4	0	251	76	84	12	95	10	0	7	1,270	4	7.71	2.72	2.83	0.34	21.2	7.5	1.10	.270	2.41	2.29	66	7.19	40.3
25	Whitey Ford W. Ford	61	244.2	1964	NYY	39	17	6	.739	36	2.13	172	12	8	1	212	58	67	10	57	2	2	3	996	6	6.33	2.10	3.02	0.37	17.3	5.7	1.10	.268	2.46	2.45	67	7.80	33.3