The Colorado Rockies have the highest ERA by a team this season, with an ERA of 5.80.

Interpreted as:

teams with worst era this regular season

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Rockies	5.80	2025	46	.174	8	38	46	299	0	0	6	397.0	473	256	296	56	162	16	4	1,799	23	6.78	3.67	1.85	1.27	16.6	9.0	1.60	.329	6.71	10.72
2	Orioles	5.52	2025	45	.333	15	30	45	344	0	0	7	391.0	423	240	254	72	154	16	3	1,723	20	7.92	3.54	2.23	1.66	20.0	8.9	1.48	.309	5.85	9.74
3	Marlins	5.34	2025	45	.400	18	27	45	355	0	0	7	399.2	405	237	253	57	180	18	6	1,767	14	7.99	4.05	1.97	1.28	20.1	10.2	1.46	.301	5.70	9.12
4	Nationals	5.28	2025	48	.438	21	27	48	392	0	0	14	419.0	437	246	256	48	171	33	1	1,864	27	8.42	3.67	2.29	1.03	21.0	9.2	1.45	.319	5.50	9.39
5	Athletics	5.12	2025	47	.468	22	25	47	376	0	0	13	418.1	433	238	260	60	191	22	7	1,878	7	8.09	4.11	1.97	1.29	20.0	10.2	1.49	.303	5.59	9.32
6	Angels	5.08	2025	45	.444	20	25	45	334	0	0	10	393.0	410	222	240	63	178	13	11	1,728	22	7.65	4.08	1.88	1.44	19.3	10.3	1.50	.304	5.50	9.39
7	Diamondbacks	4.70	2025	47	.532	25	22	47	416	0	0	16	421.0	408	220	240	64	161	18	6	1,818	10	8.89	3.44	2.58	1.37	22.9	8.9	1.35	.297	5.13	8.72
8	Blue Jays	4.31	2025	46	.478	22	24	46	424	0	0	14	411.2	374	197	207	68	139	23	6	1,728	15	9.27	3.04	3.05	1.49	24.5	8.0	1.25	.285	4.53	8.18
9	White Sox	4.23	2025	47	.298	14	33	47	336	0	0	3	402.1	391	189	210	50	177	29	7	1,767	14	7.52	3.96	1.90	1.12	19.0	10.0	1.41	.290	4.70	8.75
10	Dodgers	4.18	2025	47	.617	29	18	47	433	0	0	16	416.0	375	193	209	59	165	14	5	1,758	22	9.37	3.57	2.62	1.28	24.6	9.4	1.30	.291	4.52	8.11
11	Red Sox	4.16	2025	48	.479	23	25	48	400	0	0	10	430.2	428	199	226	48	151	21	6	1,852	11	8.36	3.16	2.65	1.00	21.6	8.2	1.34	.308	4.72	8.94
12	Guardians	4.14	2025	46	.543	25	21	46	392	0	0	14	404.0	403	186	202	53	167	11	2	1,746	18	8.73	3.72	2.35	1.18	22.5	9.6	1.41	.312	4.50	8.98
13	Brewers	4.14	2025	47	.468	22	25	47	370	0	0	8	410.2	371	189	205	52	174	18	7	1,760	9	8.11	3.81	2.13	1.14	21.0	9.9	1.33	.278	4.49	8.13
14	Pirates	4.08	2025	47	.319	15	32	47	344	1	0	8	417.0	376	189	203	39	154	20	8	1,759	15	7.42	3.32	2.23	0.84	19.6	8.8	1.27	.280	4.38	8.12
15	Cubs	3.93	2025	47	.596	28	19	47	377	0	0	10	421.0	398	184	200	57	143	17	5	1,782	9	8.06	3.06	2.64	1.22	21.2	8.0	1.29	.287	4.28	8.51
16	Rays	3.91	2025	46	.457	21	25	46	353	0	0	12	411.2	369	179	188	64	133	16	3	1,702	5	7.72	2.91	2.65	1.40	20.7	7.8	1.22	.268	4.11	8.07
17	Phillies	3.77	2025	46	.609	28	18	46	450	0	0	15	412.2	380	173	192	47	132	17	3	1,731	15	9.81	2.88	3.41	1.03	26.0	7.6	1.24	.307	4.19	8.29
18	Braves	3.75	2025	47	.511	24	23	47	400	0	0	10	415.2	359	173	184	54	154	16	10	1,730	16	8.66	3.33	2.60	1.17	23.1	8.9	1.23	.276	3.98	7.77
19	Mariners	3.72	2025	45	.578	26	19	45	372	0	0	15	411.2	394	170	193	44	148	12	10	1,757	9	8.13	3.24	2.51	0.96	21.2	8.4	1.32	.296	4.22	8.61
20	Cardinals	3.72	2025	47	.553	26	21	47	330	1	1	12	416.2	372	172	186	35	137	13	6	1,735	14	7.13	2.96	2.41	0.76	19.0	7.9	1.22	.276	4.02	8.04
21	Reds	3.58	2025	48	.500	24	24	48	399	0	0	14	427.0	354	170	190	55	145	17	3	1,774	16	8.41	3.06	2.75	1.16	22.5	8.2	1.17	.258	4.00	7.46
22	Yankees	3.54	2025	46	.587	27	19	46	428	0	0	12	407.0	307	160	176	39	171	11	1	1,692	10	9.46	3.78	2.50	0.86	25.3	10.1	1.17	.257	3.89	6.79
23	Padres	3.39	2025	45	.600	27	18	45	398	2	2	16	397.2	319	150	161	46	147	14	4	1,643	11	9.01	3.33	2.71	1.04	24.2	8.9	1.17	.263	3.64	7.22
24	Astros	3.39	2025	46	.522	24	22	46	423	2	0	12	403.2	314	152	165	41	140	14	1	1,656	8	9.43	3.12	3.02	0.91	25.5	8.5	1.12	.263	3.68	7.00
25	Giants	3.36	2025	47	.596	28	19	47	403	0	0	13	415.0	357	155	175	37	150	15	5	1,728	12	8.74	3.25	2.69	0.80	23.3	8.7	1.22	.285	3.80	7.74