who has the lowest era with a minimum of 0.99 ip per team game in a single season in 1920 to 2023

Between the 1920 and 2023 seasons, Bob Gibson had the best ERA when he had 1 or more (IP/TM GMS) in a season, with an ERA of 1.12 in 1968.

	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	Bob Gibson B. Gibson	1.12	304.2	162	1.88	1968	STL	34	22	9	.710	34	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	38	1.77	63	5.85	34.8
2	Dwight Gooden D. Gooden	1.53	276.2	162	1.71	1985	NYM	35	24	4	.857	35	268	16	8	0	198	47	51	13	69	2	0	4	1,065	6	8.72	2.24	3.88	0.42	25.2	6.5	0.97	.259	1.66	44	2.12	59	6.44	45.6
3	Greg Maddux G. Maddux	1.56	202.0	114	1.77	1994	ATL	25	16	6	.727	25	156	10	3	0	150	35	44	4	31	6	0	3	774	3	6.95	1.38	5.03	0.18	20.2	4.0	0.90	.253	1.96	37	2.39	55	6.68	43.7
4	Luis Tiant L. Tiant	1.60	258.1	162	1.59	1968	CLE	34	21	9	.700	32	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	53	2.04	64	5.30	33
5	Shane Bieber S. Bieber	1.63	77.1	60	1.29	2020	CLE	12	8	1	.889	12	122	0	0	0	46	14	15	7	21	1	0	0	297	5	14.20	2.44	5.81	0.81	41.1	7.1	0.87	.267	1.75	37	2.06	46	5.35	20.5
6	Greg Maddux G. Maddux	1.63	209.2	144	1.46	1995	ATL	28	19	2	.905	28	181	10	3	0	147	38	39	8	23	4	0	3	785	1	7.77	0.99	7.87	0.34	23.1	2.9	0.81	.244	1.67	39	2.25	52	6.31	46.9
7	Spud Chandler S. Chandler	1.64	253.0	155	1.63	1943	NYY	30	20	4	.833	30	134	20	5	0	197	46	62	5	54	4	0		989	3	4.77	1.92	2.48	0.18	13.5	5.5	0.99	.242	2.21	50	2.30	68	7.01	29.8
8	Dean Chance D. Chance	1.65	278.1	162	1.72	1964	LAA	46	20	9	.690	35	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	48	2.39	67	6.27	37.9
9	Zack Greinke Z. Greinke	1.66	222.2	162	1.37	2015	LAD	32	19	3	.864	32	200	1	0	0	148	41	43	14	40	5	0	1	843	7	8.08	1.62	5.00	0.57	23.7	4.7	0.84	.229	1.74	44	2.75	73	5.98	26.2
10	Carl Hubbell C. Hubbell	1.66	308.2	156	1.98	1933	NYG	45	23	12	.657	33	156	22	10	5	256	57	69	6	47	3	11		1,206	3	4.55	1.37	3.32	0.17	12.9	3.9	0.98	.252	2.01	52	2.53	74	7.46	31.1
11	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
12	Jacob deGrom J. deGrom	1.70	217.0	162	1.34	2018	NYM	32	10	9	.526	32	269	1	0	0	152	41	48	10	46	5	0	3	835	2	11.16	1.91	5.85	0.41	32.2	5.5	0.91	.281	1.99	44	1.98	50	6.30	49
13	Trevor Bauer T. Bauer	1.73	73.0	60	1.22	2020	CIN	11	5	4	.556	11	100	2	2	0	41	14	17	9	17	3	0	1	278	3	12.33	2.10	5.88	1.11	36.0	6.1	0.79	.215	2.10	36	2.87	61	5.05	14.1
14	Sandy Koufax S. Koufax	1.73	323.0	162	1.99	1966	LAD	41	27	9	.750	41	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	53	2.07	65	6.72	41.8
15	Sandy Koufax S. Koufax	1.74	223.0	164	1.36	1964	LAD	29	19	5	.792	28	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	53	2.08	67	6.22	27.1
16	Pedro Martinez P. Martinez	1.74	217.0	162	1.34	2000	BOS	29	18	6	.750	29	284	7	4	0	128	42	44	17	32	14	0	0	817	1	11.78	1.33	8.88	0.71	34.8	3.9	0.74	.236	1.82	35	2.16	47	5.31	61.5
17	Ron Guidry R. Guidry	1.74	273.2	163	1.68	1978	NYY	35	25	3	.893	35	248	16	9	0	187	53	61	13	72	1	0	1	1,057	7	8.16	2.37	3.44	0.43	23.5	6.8	0.95	.241	2.01	48	2.18	58	6.15	48.5
18	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
19	Tom Seaver T. Seaver	1.76	286.1	162	1.77	1971	NYM	36	20	10	.667	35	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	52	1.93	58	6.60	44.5
20	Jake Arrieta J. Arrieta	1.77	229.0	162	1.41	2015	CHC	33	22	6	.786	33	236	4	3	0	150	45	52	10	48	6	0	2	870	6	9.28	1.89	4.92	0.39	27.1	5.5	0.86	.246	2.04	45	2.34	60	5.90	39
21	Clayton Kershaw C. Kershaw	1.77	198.1	162	1.22	2014	LAD	27	21	3	.875	27	239	6	2	0	139	39	42	9	31	2	0	0	749	7	10.85	1.41	7.71	0.41	31.9	4.1	0.86	.278	1.91	51	1.81	50	6.31	40.5
22	Mort Cooper M. Cooper	1.78	278.2	156	1.79	1942	SLN	37	22	7	.759	35	152	22	10	0	207	55	73	9	68	5	1		1,100	5	4.91	2.20	2.24	0.29	13.8	6.2	0.99	.229	2.36	53	2.53	72	6.69	30.2
23	Sam McDowell S. McDowell	1.81	269.0	162	1.66	1968	CLE	38	15	14	.517	37	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	59	2.25	70	6.06	28.3
24	Hal Newhouser H. Newhouser	1.81	313.1	155	2.02	1945	DET	40	25	9	.735	36	212	29	8	2	239	63	73	5	110	0	2		1,261	10	6.09	3.16	1.93	0.14	16.8	8.7	1.11	.251	2.10	52	2.45	68	6.86	39.5
25	Vida Blue V. Blue	1.82	312.0	161	1.94	1971	OAK	39	24	8	.750	39	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	56	2.19	66	6.03	41.4