Chase Petty has the highest ERA by a starting pitcher this season, with an ERA of 21.94.

Interpreted as:

worst era by a starting pitcher 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	H/9
1	Chase Petty C. Petty	21.94	2025	CIN	2	0	2	.000	2	7	0	0	0	5.1	13	13	13	3	8	0	0	0	36	0	11.81	13.50	0.88	5.06	19.4	22.2	3.94	.556	21.94	21.94
2	Yariel Rodríguez Y. Rodríguez	18.00	2025	TOR	1	0	0		1	1	0	0	0	1.0	2	2	2	1	2	0	0	0	6	1	9.00	18.00	0.50	9.00	16.7	33.3	4.00	.500	18.00	18.00
3	Doug Nikhazy D. Nikhazy	18.00	2025	CLE	1	0	1	.000	1	3	0	0	0	3.0	5	6	6	0	6	0	0	0	20	1	9.00	18.00	0.50	0.00	15.0	30.0	3.67	.455	18.00	15.00
4	Bobby Miller B. Miller	18.00	2025	LAD	1	0	0		1	7	0	0	0	3.0	8	6	6	2	1	0	0	0	18	0	21.00	3.00	7.00	6.00	38.9	5.6	3.00	.750	18.00	24.00
5	Kyle Gibson K. Gibson	16.78	2025	BAL	4	0	3	.000	4	10	0	0	0	12.1	29	23	23	7	7	0	0	0	73	1	7.30	5.11	1.43	5.11	13.7	9.6	2.92	.449	16.78	21.16
6	Joey Estes J. Estes	15.43	2025	ATH	2	0	2	.000	2	5	0	0	0	7.0	15	12	12	4	6	1	0	0	42	0	6.43	7.71	0.83	5.14	11.9	14.3	3.00	.423	15.43	19.29
7	Aaron Civale A. Civale	15.00	2025	MIL	1	0	1	.000	1	2	0	0	0	3.0	4	5	5	3	1	0	0	1	14	0	6.00	3.00	2.00	9.00	14.3	7.1	1.67	.125	15.00	12.00
8	Blade Tidwell B. Tidwell	14.73	2025	NYM	1	0	1	.000	1	2	0	0	0	3.2	9	6	6	1	3	1	0	0	23	0	4.91	7.36	0.67	2.45	8.7	13.0	3.27	.500	14.73	22.09
9	Bradley Blalock B. Blalock	14.54	2025	COL	3	0	2	.000	3	6	0	0	0	13.0	22	21	21	4	6	0	0	0	65	2	4.15	4.15	1.00	2.77	9.2	9.2	2.15	.367	14.54	15.23
10	Justin Wrobleski J. Wrobleski	14.40	2025	LAD	1	0	1	.000	1	4	0	0	0	5.0	8	8	8	2	3	0	0	0	26	0	7.20	5.40	1.33	3.60	15.4	11.5	2.20	.353	14.40	14.40
11	Thomas Harrington T. Harrington	13.50	2025	PIT	1	0	1	.000	1	2	0	0	0	4.0	7	6	6	1	4	0	0	0	23	1	4.50	9.00	0.50	2.25	8.7	17.4	2.75	.375	13.50	15.75
12	Chayce McDermott C. McDermott	12.00	2025	BAL	1	0	0		1	5	0	0	0	3.0	4	4	4	1	3	1	0	0	16	0	15.00	9.00	1.67	3.00	31.3	18.8	2.33	.500	12.00	12.00
13	Marcus Stroman M. Stroman	11.57	2025	NYY	3	0	1	.000	3	7	0	0	0	9.1	12	12	12	2	7	0	0	0	47	0	6.75	6.75	1.00	1.93	14.9	14.9	2.04	.323	11.57	11.57
14	Clayton Kershaw C. Kershaw	11.25	2025	LAD	1	0	0		1	2	0	0	0	4.0	5	5	5	1	3	0	0	0	20	0	4.50	6.75	0.67	2.25	10.0	15.0	2.00	.286	11.25	11.25
15	Carson Palmquist C. Palmquist	11.25	2025	COL	1	0	1	.000	1	0	0	0	0	4.0	6	5	5	0	1	0	0	0	19	0	0.00	2.25	0.00	0.00	0.0	5.3	1.75	.333	11.25	13.50
16	Elvin Rodríguez E. Rodríguez	11.00	2025	MIL	2	0	2	.000	2	5	0	0	0	9.0	14	11	11	5	2	1	0	0	42	0	5.00	2.00	2.50	5.00	11.9	4.8	1.78	.310	11.00	14.00
17	Charlie Morton C. Morton	10.22	2025	BAL	6	0	6	.000	6	23	0	0	0	24.2	35	28	28	6	16	2	0	0	125	0	8.39	5.84	1.44	2.19	18.4	12.8	2.07	.372	10.22	12.77
18	Jacob Lopez J. Lopez	10.13	2025	ATH	1	0	1	.000	1	4	0	0	0	2.2	6	3	3	0	4	1	0	0	18	0	13.50	13.50	1.00	0.00	22.2	22.2	3.75	.667	10.13	20.25
19	Justin Topa J. Topa	9.00	2025	MIN	1	0	0		1	1	0	0	0	1.0	3	1	1	0	0	0	0	0	6	0	9.00	0.00		0.00	16.7	0.0	3.00	.600	9.00	27.00
20	Nestor Cortes N. Cortes	9.00	2025	MIL	2	1	1	.500	2	8	0	0	0	8.0	7	8	8	5	7	0	0	0	38	0	9.00	7.88	1.14	5.63	21.1	18.4	1.75	.111	9.00	7.88
21	Germán Márquez G. Márquez	8.78	2025	COL	9	1	6	.143	9	21	0	0	0	40.0	57	39	43	4	16	4	0	0	193	4	4.72	3.60	1.31	0.90	10.9	8.3	1.83	.358	9.67	12.83
22	Connor Gillispie C. Gillispie	8.65	2025	MIA	6	0	3	.000	6	23	0	0	0	26.0	32	25	26	6	11	1	0	0	123	1	7.96	3.81	2.09	2.08	18.7	8.9	1.65	.317	9.00	11.08
23	Kumar Rocker K. Rocker	8.10	2025	TEX	5	1	3	.250	5	16	0	0	0	20.0	30	18	19	3	5	1	0	0	95	3	7.20	2.25	3.20	1.35	16.8	5.3	1.75	.386	8.55	13.50
24	Tanner Houck T. Houck	8.04	2025	BOS	9	0	3	.000	9	32	0	0	0	43.2	57	39	41	10	17	5	0	0	203	2	6.60	3.50	1.88	2.06	15.8	8.4	1.69	.338	8.45	11.75
25	Sandy Alcantara S. Alcantara	7.99	2025	MIA	9	2	6	.250	9	34	0	0	0	41.2	44	37	37	7	23	1	0	0	191	4	7.34	4.97	1.48	1.51	17.8	12.0	1.61	.294	7.99	9.50