Since 2022, Jordan Lyles has the worst ERA in a season, with an ERA of 6.28 in 2023.

Interpreted as:

worst single season era with a minimum of 1 IP per team game by a player since 2022

	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	Jordan Lyles J. Lyles	6.28	2023	KCR	31	6	17	.261	31	120	3	0	0	177.2	176	124	130	39	45	6	0	0	748	10	6.08	2.28	2.67	1.98	16.0	6.0	1.24	.255	6.59	140	5.62	131	8.92	-26.3
2	Lance Lynn L. Lynn	5.73	2023	TOT	32	13	11	.542	32	191	0	0	0	183.2	189	117	127	44	67	9	0	1	808	3	9.36	3.28	2.85	2.16	23.6	8.3	1.39	.292	6.22	133	5.53	125	9.26	-21.7
3	Jake Irvin J. Irvin	5.70	2025	WSH	33	9	13	.409	33	124	0	0	0	180.0	195	114	120	38	62	6	0	0	787	3	6.20	3.10	2.00	1.90	15.8	7.9	1.43	.282	6.00	137	5.63	135	9.75	-28.7
4	Mitchell Parker M. Parker	5.68	2025	WSH	33	9	16	.360	30	103	0	0	1	164.2	178	104	116	25	58	4	2	0	725	3	5.63	3.17	1.78	1.37	14.2	8.0	1.43	.286	6.34	136	4.98	119	9.73	-14.6
5	Patrick Corbin P. Corbin	5.62	2024	WSH	32	6	13	.316	32	139	0	0	0	174.2	208	109	114	25	54	3	0	1	764	3	7.16	2.78	2.57	1.29	18.2	7.1	1.50	.337	5.87	137	4.41	108	10.72	-5.9
6	Sandy Alcantara S. Alcantara	5.36	2025	MIA	31	11	12	.478	31	142	0	0	0	174.2	165	104	107	22	57	9	0	0	745	8	7.32	2.94	2.49	1.13	19.1	7.7	1.27	.278	5.51	125	4.27	103	8.50	-2.7
7	Miles Mikolas M. Mikolas	5.35	2024	STL	32	10	11	.476	32	122	0	0	0	171.2	194	102	106	26	25	5	0	0	720	0	6.40	1.31	4.88	1.36	16.9	3.5	1.28	.310	5.56	132	4.23	106	10.17	-5.1
8	Andre Pallante A. Pallante	5.31	2025	STL	31	6	15	.286	31	111	0	0	0	162.2	173	96	109	21	62	5	0	0	715	12	6.14	3.43	1.79	1.16	15.5	8.7	1.44	.295	6.03	129	4.68	116	9.57	-11.7
9	Brandon Pfaadt B. Pfaadt	5.25	2025	AZ	33	13	9	.591	33	147	0	0	0	176.2	198	103	107	26	37	12	0	2	767	3	7.49	1.88	3.97	1.32	19.2	4.8	1.33	.316	5.45	123	4.21	105	10.09	-4.3
10	José Berríos J. Berríos	5.23	2022	TOR	32	12	7	.632	32	149	0	0	0	172.0	199	100	103	29	45	11	0	0	753	3	7.80	2.35	3.31	1.52	19.8	6.0	1.42	.328	5.39	136	4.54	113	10.41	-9.7
11	Patrick Corbin P. Corbin	5.20	2023	WSH	32	10	15	.400	32	124	0	0	0	180.0	210	104	113	33	57	4	0	0	790	6	6.20	2.85	2.18	1.65	15.7	7.2	1.48	.309	5.65	120	5.27	119	10.50	-16.9
12	Griffin Canning G. Canning	5.19	2024	LAA	32	6	13	.316	31	130	0	0	0	171.2	174	99	105	31	66	6	1	1	739	6	6.82	3.46	1.97	1.63	17.6	8.9	1.40	.283	5.50	127	5.25	125	9.12	-19.1
13	Kyle Gibson K. Gibson	5.05	2022	PHI	31	10	8	.556	31	144	0	0	0	167.2	176	94	98	24	48	9	0	0	718	4	7.73	2.58	3.00	1.29	20.1	6.7	1.34	.308	5.26	125	4.27	105	9.45	-3.6
14	Kyle Freeland K. Freeland	4.98	2025	COL	31	5	17	.227	31	124	0	0	0	162.2	193	90	105	22	38	6	0	2	709	2	6.86	2.10	3.26	1.22	17.5	5.4	1.42	.329	5.81	105	4.17	96	10.68	3.2
15	Germán Márquez G. Márquez	4.95	2022	COL	31	9	13	.409	31	150	0	0	0	181.2	185	100	109	30	63	4	0	0	779	8	7.43	3.12	2.38	1.49	19.3	8.1	1.37	.291	5.40	106	4.71	112	9.17	-9.7
16	Lucas Giolito L. Giolito	4.88	2023	TOT	33	7	15	.318	33	204	0	0	0	184.1	169	100	110	41	73	9	0	2	794	5	9.96	3.56	2.79	2.00	25.7	9.2	1.31	.274	5.37	113	5.26	120	8.25	-17.8
17	Shane Baz S. Baz	4.87	2025	TBR	31	10	12	.455	31	176	0	0	0	166.1	158	90	91	26	64	9	0	0	711	3	9.52	3.46	2.75	1.41	24.8	9.0	1.33	.303	4.92	124	4.36	108	8.55	-6.2
18	Zac Gallen Z. Gallen	4.83	2025	AZ	33	13	15	.464	33	175	0	0	0	192.0	176	103	109	31	66	4	0	1	813	2	8.20	3.09	2.65	1.45	21.5	8.1	1.26	.270	5.11	113	4.50	112	8.25	-11
19	Miles Mikolas M. Mikolas	4.78	2023	STL	35	9	13	.409	35	137	0	0	0	201.1	226	107	110	26	39	8	0	0	860	4	6.12	1.74	3.51	1.16	15.9	4.5	1.32	.308	4.92	111	4.27	100	10.10	0.2
20	Kyle Hendricks K. Hendricks	4.76	2025	LAA	31	8	10	.444	31	114	0	0	0	164.2	167	87	92	25	43	5	0	3	695	0	6.23	2.35	2.65	1.37	16.4	6.2	1.28	.280	5.03	114	4.59	107	9.13	-5.1
21	Austin Gomber A. Gomber	4.75	2024	COL	30	5	12	.294	30	116	0	0	0	165.0	178	87	89	30	38	1	0	0	696	3	6.33	2.07	3.05	1.64	16.7	5.5	1.31	.290	4.85	102	4.83	113	9.71	-9.6
22	Kyle Gibson K. Gibson	4.73	2023	BAL	33	14	9	.609	33	157	0	0	0	192.0	198	101	101	23	55	6	0	0	807	8	7.36	2.58	2.85	1.08	19.5	6.8	1.32	.309	4.73	113	4.13	98	9.28	1.3
23	Brandon Pfaadt B. Pfaadt	4.71	2024	ARI	32	11	10	.524	32	185	0	0	0	181.2	183	95	103	24	42	4	0	1	760	1	9.17	2.08	4.40	1.19	24.3	5.5	1.24	.315	5.10	113	3.60	91	9.07	6.7
24	Dylan Cease D. Cease	4.58	2023	CWS	33	7	9	.438	33	214	0	0	0	177.0	172	90	98	19	79	9	0	3	784	13	10.88	4.02	2.71	0.97	27.3	10.1	1.42	.330	4.98	106	3.72	84	8.75	13.4
25	Nick Pivetta N. Pivetta	4.56	2022	BOS	33	10	12	.455	33	175	1	0	0	179.2	175	91	91	27	73	5	0	0	773	10	8.77	3.66	2.40	1.35	22.6	9.4	1.38	.300	4.56	111	4.41	111	8.77	-8.6