best single season era among active players

Jacob deGrom has the best ERA by an active pitcher in a season, with an ERA of 1.08 in 2021.

Interpreted as:

best single season era with a minimum of 0.5 IP per team game among active players

	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	Jacob deGrom J. deGrom	1.08	2021	NYM	15	7	2	.778	15	146	1	1	0	92.0	40	11	14	6	11	1	0	0	324	0	14.28	1.08	13.27	0.59	45.1	3.4	0.55	.213	1.37	27	1.23	29	3.91	30.6
2	Trevor Rogers T. Rogers	1.35	2025	BAL	17	9	2	.818	17	100	1	0	0	106.2	67	16	17	3	26	2	0	0	408	0	8.44	2.19	3.85	0.25	24.5	6.4	0.87	.231	1.43	34	2.41	59	5.65	20.3
3	Ranger Suárez R. Suárez	1.36	2021	PHI	39	8	5	.615	12	107	1	1	4	106.0	73	16	20	4	33	5	13	3	418	1	9.08	2.80	3.24	0.34	25.6	7.9	1.00	.257	1.70	32	2.71	63	6.20	18.7
4	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
5	Clayton Kershaw C. Kershaw	1.69	2016	LAD	21	12	4	.750	21	172	3	3	0	149.0	97	28	31	8	11	2	0	1	544	5	10.39	0.66	15.64	0.48	31.6	2.0	0.72	.254	1.87	42	1.79	44	5.86	37.9
6	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
7	Nathan Eovaldi N. Eovaldi	1.73	2025	TEX	22	11	3	.786	22	129	1	1	0	130.0	90	25	28	10	21	7	0	1	496	6	8.93	1.45	6.14	0.69	26.0	4.2	0.85	.243	1.94	42	2.80	66	6.23	20.9
8	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
9	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
10	Liam Hendriks L. Hendriks	1.80	2019	OAK	75	4	4	.500	2	124	0	0	25	85.0	61	17	18	5	21	2	41	5	332	7	13.13	2.22	5.90	0.53	37.3	6.3	0.96	.311	1.91	41	1.86	42	6.46	25.1
11	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
12	Blake Snell B. Snell	1.89	2018	TBR	31	21	5	.808	31	221	0	0	0	180.2	112	38	41	16	64	1	0	2	700	13	11.01	3.19	3.45	0.80	31.6	9.1	0.97	.241	2.04	46	2.94	72	5.58	23.1
13	Paul Skenes P. Skenes	1.96	2024	PIT	23	11	3	.786	23	170	0	0	0	133.0	94	29	31	10	32	6	0	0	514	2	11.50	2.17	5.31	0.68	33.1	6.2	0.95	.284	2.10	47	2.44	60	6.36	23.9
14	Paul Skenes P. Skenes	1.97	2025	PIT	32	10	10	.500	32	216	1	0	0	187.2	136	41	45	11	42	6	0	0	733	2	10.36	2.01	5.14	0.53	29.5	5.7	0.95	.273	2.16	46	2.36	57	6.52	37.1
15	Brock Burke B. Burke	1.97	2022	TEX	52	7	5	.583	0	90	0	0	0	82.1	63	18	25	9	24	2	5	1	328	2	9.84	2.62	3.75	0.98	27.4	7.3	1.06	.266	2.73	50	3.29	81	6.89	6.9
16	Reynaldo López R. López	1.99	2024	ATL	26	8	5	.615	25	148	0	0	0	135.2	108	30	32	10	42	2	0	0	543	2	9.82	2.79	3.52	0.66	27.3	7.7	1.11	.287	2.12	48	2.91	73	7.16	16.3
17	Yu Darvish Y. Darvish	2.01	2020	CHC	12	8	3	.727	12	93	0	0	0	76.0	59	17	18	5	14	2	0	1	297	3	11.01	1.66	6.64	0.59	31.3	4.7	0.96	.295	2.13	46	2.22	50	6.99	18.6
18	Chris Sale C. Sale	2.11	2018	BOS	27	12	4	.750	27	237	0	0	0	158.0	102	37	39	11	34	14	0	0	617	4	13.50	1.94	6.97	0.63	38.4	5.5	0.86	.283	2.22	48	1.97	47	5.81	39.2
19	Tyler Holton T. Holton	2.11	2023	DET	59	3	2	.600	1	74	0	0	1	85.1	56	20	21	9	18	1	7	1	324	4	7.80	1.90	4.11	0.95	22.8	5.6	0.87	.212	2.21	50	3.56	84	5.91	6.5
20	Corbin Burnes C. Burnes	2.11	2020	MIL	12	4	1	.800	9	88	0	0	0	59.2	37	14	15	2	24	3	2	0	240	5	13.27	3.62	3.67	0.30	36.7	10.0	1.02	.285	2.26	47	2.03	46	5.58	16
21	Clayton Kershaw C. Kershaw	2.13	2015	LAD	33	16	7	.696	33	301	4	3	0	232.2	163	55	62	15	42	5	0	1	890	9	11.64	1.62	7.17	0.58	33.8	4.7	0.88	.281	2.40	57	1.98	52	6.31	47.7
22	Kyle Hendricks K. Hendricks	2.13	2016	CHC	31	16	8	.667	30	170	2	1	0	190.0	142	45	53	15	44	8	0	3	745	5	8.05	2.08	3.86	0.71	22.8	5.9	0.98	.250	2.51	51	3.20	78	6.73	19.6
23	Tony Gonsolin T. Gonsolin	2.14	2022	LAD	24	16	1	.941	24	119	0	0	0	130.1	79	31	32	11	35	4	0	1	498	5	8.22	2.42	3.40	0.76	23.9	7.0	0.87	.207	2.21	55	3.27	81	5.46	10.8
24	Clayton Kershaw C. Kershaw	2.16	2020	LAD	10	6	2	.750	10	62	0	0	0	58.1	41	14	18	8	8	1	0	0	221	0	9.57	1.23	7.75	1.23	28.1	3.6	0.84	.232	2.78	49	3.30	74	6.33	7.4
25	Chris Sale C. Sale	2.17	2014	CWS	26	12	4	.750	26	208	2	0	0	174.0	129	42	48	13	39	11	0	2	685	3	10.76	2.02	5.33	0.67	30.4	5.7	0.97	.280	2.48	56	2.57	66	6.67	25.1