Since 1968, Yoshinobu Yamamoto has the lowest ERA in a season, with an ERA of 0.90 this season.

Interpreted as:

lowest era with a minimum of 1 IP per team game by a player in a season since 1968

	NAME	ERA	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	IP	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	Yoshinobu Yamamoto Y. Yamamoto	0.90	2025	LAD	7	4	2	.667	7	49	0	0	0	40.0	24	4	7	2	13	0	0	0	153	1	11.03	2.93	3.77	0.45	32.0	8.5	0.93	.247	1.58	22	2.23	55	5.40	8
2	Max Fried M. Fried	1.01	2025	NYY	7	6	0	1.000	7	39	0	0	0	44.2	31	5	10	2	11	4	0	0	181	2	7.86	2.22	3.55	0.40	21.5	6.1	0.94	.232	2.01	26	2.90	70	6.25	6.2
3	Bob Gibson B. Gibson	1.12	1968	STL	34	22	9	.710	34	268	28	13	0	304.2	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
4	Tyler Mahle T. Mahle	1.19	2025	TEX	7	3	1	.750	7	32	0	0	0	37.2	23	5	5	0	14	0	0	0	146	0	7.65	3.35	2.29	0.00	21.9	9.6	0.98	.230	1.19	31	2.47	60	5.50	6.8
5	Hunter Brown H. Brown	1.22	2025	HOU	6	4	1	.800	6	40	0	0	0	37.0	24	5	6	1	7	0	0	0	134	0	9.73	1.70	5.71	0.24	29.9	5.2	0.84	.267	1.46	31	1.81	45	5.84	9.1
6	Dwight Gooden D. Gooden	1.53	1985	NYM	35	24	4	.857	35	268	16	8	0	276.2	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
7	Greg Maddux G. Maddux	1.56	1994	ATL	25	16	6	.727	25	156	10	3	0	202.0	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
8	Luis Tiant L. Tiant	1.60	1968	CLE	34	21	9	.700	32	264	19	9	0	258.1	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
9	Shane Bieber S. Bieber	1.63	2020	CLE	12	8	1	.889	12	122	0	0	0	77.1	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
10	Greg Maddux G. Maddux	1.63	1995	ATL	28	19	2	.905	28	181	10	3	0	209.2	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
11	Zack Greinke Z. Greinke	1.66	2015	LAD	32	19	3	.864	32	200	1	0	0	222.2	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
12	Nolan Ryan N. Ryan	1.69	1981	HOU	21	11	5	.688	21	140	5	3	0	149.0	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
13	Jacob deGrom J. deGrom	1.70	2018	NYM	32	10	9	.526	32	269	1	0	0	217.0	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
14	Trevor Bauer T. Bauer	1.73	2020	CIN	11	5	4	.556	11	100	2	2	0	73.0	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
15	Pedro Martinez P. Martinez	1.74	2000	BOS	29	18	6	.750	29	284	7	4	0	217.0	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
16	Ron Guidry R. Guidry	1.74	1978	NYY	35	25	3	.893	35	248	16	9	0	273.2	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
17	Justin Verlander J. Verlander	1.75	2022	HOU	28	18	4	.818	28	185	0	0	0	175.0	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
18	Tom Seaver T. Seaver	1.76	1971	NYM	36	20	10	.667	35	289	21	4	0	286.1	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
19	Jake Arrieta J. Arrieta	1.77	2015	CHC	33	22	6	.786	33	236	4	3	0	229.0	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
20	Clayton Kershaw C. Kershaw	1.77	2014	LAD	27	21	3	.875	27	239	6	2	0	198.1	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
21	Nick Pivetta N. Pivetta	1.78	2025	SDP	6	5	1	.833	6	39	0	0	0	35.1	21	7	7	2	8	0	0	0	133	0	9.93	2.04	4.88	0.51	29.3	6.0	0.82	.226	1.78	45	2.26	57	5.35	6.7
22	Sam McDowell S. McDowell	1.81	1968	CLE	38	15	14	.517	37	283	11	3	0	269.0	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
23	Vida Blue V. Blue	1.82	1971	OAK	39	24	8	.750	39	301	24	8	0	312.0	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
24	Clayton Kershaw C. Kershaw	1.83	2013	LAD	33	16	9	.640	33	232	3	2	0	236.0	164	48	55	11	52	3	0	2	908	12	8.85	1.98	4.46	0.42	25.6	5.7	0.92	.251	2.10	51	2.38	64	6.25	35.4
25	Roger Clemens R. Clemens	1.87	2005	HOU	32	13	8	.619	32	185	1	0	0	211.1	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