Zac Gallen has the highest ERA this season, with an ERA of 5.75.

Interpreted as:

pitcher highest era with a minimum of 1 IP per team game no minimum this regular season

	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	Zac Gallen Z. Gallen	5.75	2025	AZ	17	5	9	.357	17	88	0	0	0	97.0	95	62	65	19	42	2	0	1	423	1	8.16	3.90	2.10	1.76	20.8	9.9	1.41	.279	6.03	138	5.18	132	8.81	-14.1
2	Jack Kochanowicz J. Kochanowicz	5.49	2025	LAA	16	3	8	.273	16	59	0	0	0	82.0	89	50	51	15	38	6	0	2	358	3	6.48	4.17	1.55	1.65	16.5	10.6	1.55	.308	5.60	134	5.63	134	9.77	-12.5
3	Brandon Pfaadt B. Pfaadt	5.38	2025	AZ	17	8	5	.615	17	72	0	0	0	85.1	97	51	54	16	21	9	0	1	377	2	7.59	2.21	3.43	1.69	19.1	5.6	1.38	.313	5.70	129	4.89	125	10.23	-9.6
4	Bailey Ober B. Ober	5.28	2025	MIN	17	4	6	.400	17	74	1	0	0	92.0	108	54	55	21	22	4	0	0	406	1	7.24	2.15	3.36	2.05	18.2	5.4	1.41	.305	5.38	132	5.29	129	10.57	-12.3
5	JP Sears	5.09	2025	ATH	17	6	7	.462	17	67	0	0	0	86.2	91	49	49	18	22	5	0	0	372	1	6.96	2.28	3.05	1.87	18.0	5.9	1.30	.281	5.09	127	5.17	126	9.45	-10.4
6	Michael Lorenzen M. Lorenzen	4.91	2025	KCR	16	4	8	.333	16	73	0	0	0	88.0	93	48	50	16	28	2	0	0	381	10	7.47	2.86	2.61	1.64	19.2	7.3	1.38	.294	5.11	116	4.81	118	9.51	-7.1
7	Luis Severino L. Severino	4.83	2025	ATH	17	2	8	.200	17	68	0	0	0	100.2	105	54	57	9	31	6	0	1	440	1	6.08	2.77	2.19	0.80	15.5	7.0	1.35	.294	5.10	120	4.00	98	9.39	1
8	Jack Flaherty J. Flaherty	4.80	2025	DET	16	5	9	.357	16	100	0	0	0	84.1	69	45	46	16	35	3	0	0	353	1	10.67	3.74	2.86	1.71	28.3	9.9	1.23	.266	4.91	121	4.53	112	7.36	-4.6
9	Jake Irvin J. Irvin	4.73	2025	WSH	17	6	3	.667	17	71	0	0	0	99.0	99	52	53	19	30	3	0	0	423	1	6.45	2.73	2.37	1.73	16.8	7.1	1.30	.267	4.82	116	5.14	126	9.00	-11.5
10	Kyle Hendricks K. Hendricks	4.66	2025	LAA	16	5	6	.455	16	60	0	0	0	87.0	90	45	48	15	23	4	0	3	371	0	6.21	2.38	2.61	1.55	16.2	6.2	1.30	.279	4.97	114	4.88	116	9.31	-6.1
11	Chris Paddack C. Paddack	4.64	2025	MIN	16	3	6	.333	16	60	0	0	0	85.1	81	44	48	11	24	2	0	0	359	2	6.33	2.53	2.50	1.16	16.7	6.7	1.23	.267	5.06	116	4.27	104	8.54	-1.7
12	Dean Kremer D. Kremer	4.60	2025	BAL	16	6	7	.462	15	72	0	0	0	90.0	97	46	48	12	24	1	0	0	384	5	7.20	2.40	3.00	1.20	18.8	6.3	1.34	.309	4.80	117	4.05	101	9.70	-0.5
13	Mitchell Parker M. Parker	4.59	2025	WSH	16	5	8	.385	16	59	0	0	0	86.1	81	44	48	11	33	3	0	0	370	2	6.15	3.44	1.79	1.15	15.9	8.9	1.32	.265	5.00	113	4.62	113	8.44	-5.1
14	Taj Bradley T. Bradley	4.57	2025	TBR	16	5	5	.500	16	77	0	0	0	86.2	76	44	52	12	35	4	0	0	366	0	8.00	3.63	2.20	1.25	21.0	9.6	1.28	.269	5.40	119	4.46	112	7.89	-5
15	Dylan Cease D. Cease	4.53	2025	SDP	17	3	7	.300	17	117	0	0	0	91.1	85	46	49	10	36	3	0	1	393	2	11.53	3.55	3.25	0.99	29.8	9.2	1.32	.330	4.83	115	3.23	81	8.38	7.9
16	Andrew Heaney A. Heaney	4.48	2025	PIT	16	3	7	.300	16	64	0	0	0	86.1	78	43	43	14	30	3	0	0	363	2	6.67	3.13	2.13	1.46	17.6	8.3	1.25	.254	4.48	107	4.86	120	8.13	-7.8
17	Jameson Taillon J. Taillon	4.47	2025	CHC	16	7	5	.583	16	70	0	0	0	90.2	81	45	46	21	19	0	0	0	367	1	6.95	1.89	3.68	2.08	19.1	5.2	1.10	.233	4.57	112	5.18	131	8.04	-12.6
18	Andre Pallante A. Pallante	4.43	2025	STL	16	5	4	.556	16	60	0	0	0	87.1	89	43	45	12	29	1	0	0	375	5	6.18	2.99	2.07	1.24	16.0	7.7	1.35	.282	4.64	110	4.53	114	9.17	-5.7
19	Tyler Anderson T. Anderson	4.41	2025	LAA	16	2	5	.286	16	70	0	0	0	85.2	84	42	46	15	33	3	0	3	375	5	7.35	3.47	2.12	1.58	18.7	8.8	1.37	.272	4.83	108	4.99	118	8.82	-7.1
20	Shane Baz S. Baz	4.37	2025	TBR	16	8	3	.727	16	86	0	0	0	90.2	79	44	44	14	35	5	0	0	379	0	8.54	3.47	2.46	1.39	22.7	9.2	1.26	.272	4.37	113	4.52	114	7.84	-5.8
21	Luis L. Ortiz L. L. Ortiz	4.36	2025	CLE	16	4	9	.308	16	96	0	0	0	88.2	80	43	44	12	42	1	0	0	382	0	9.74	4.26	2.29	1.22	25.1	11.0	1.38	.294	4.47	110	4.13	102	8.12	-0.9
22	Brady Singer B. Singer	4.31	2025	CIN	16	7	6	.538	16	76	0	0	0	85.2	78	41	44	10	36	4	0	0	367	1	7.98	3.78	2.11	1.05	20.7	9.8	1.33	.282	4.62	99	4.23	99	8.19	0.7
23	Jeffrey Springs J. Springs	4.30	2025	ATH	17	6	6	.500	15	75	0	0	0	92.0	80	44	53	14	34	1	0	0	390	0	7.34	3.33	2.21	1.37	19.2	8.7	1.24	.248	5.18	107	4.57	112	7.83	-4.9
24	Chris Bassitt C. Bassitt	4.29	2025	TOR	17	7	4	.636	17	93	0	0	0	94.1	103	45	47	11	25	7	0	0	412	2	8.87	2.39	3.72	1.05	22.6	6.1	1.36	.333	4.48	108	3.64	89	9.83	4.6
25	Kevin Gausman K. Gausman	4.21	2025	TOR	16	6	6	.500	16	90	0	0	0	94.0	75	44	45	12	25	3	0	1	376	0	8.62	2.39	3.60	1.15	23.9	6.6	1.06	.256	4.31	106	3.72	91	7.18	3.8