The Colorado Rockies had the highest ERA by a team this season, with an ERA of 5.97.

Interpreted as:

team with highest 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	5.97	2025	162	.265	43	119	162	1,093	0	0	29	1407.1	1,673	933	1,021	251	554	73	19	6,367	60	6.99	3.54	1.97	1.61	17.2	8.7	1.58	.323	6.53	10.70
2	Nationals	5.35	2025	162	.407	66	96	162	1,248	0	0	37	1423.1	1,491	846	899	214	566	89	6	6,287	68	7.89	3.58	2.20	1.35	19.9	9.0	1.45	.306	5.68	9.43
3	Angels	4.89	2025	162	.444	72	90	162	1,280	0	0	38	1431.1	1,429	777	837	223	620	52	44	6,255	63	8.05	3.90	2.06	1.40	20.5	9.9	1.43	.296	5.26	8.99
4	Athletics	4.70	2025	162	.469	76	86	162	1,323	0	0	35	1437.2	1,387	750	817	222	570	80	26	6,232	29	8.28	3.57	2.32	1.39	21.2	9.1	1.36	.289	5.11	8.68
5	Orioles	4.60	2025	162	.463	75	87	162	1,351	1	0	38	1432.2	1,433	733	788	217	523	48	19	6,166	63	8.49	3.29	2.58	1.36	21.9	8.5	1.37	.302	4.95	9.00
6	Marlins	4.60	2025	162	.488	79	83	162	1,294	0	0	40	1443.1	1,376	737	798	199	507	71	17	6,185	65	8.07	3.16	2.55	1.24	20.9	8.2	1.30	.286	4.98	8.58
7	Twins	4.55	2025	162	.432	70	92	162	1,372	1	0	28	1426.2	1,411	721	773	194	459	69	19	6,116	47	8.66	2.90	2.99	1.22	22.4	7.5	1.31	.303	4.88	8.90
8	Diamondbacks	4.49	2025	162	.494	80	82	162	1,288	0	0	42	1444.0	1,403	721	785	196	500	57	20	6,183	31	8.03	3.12	2.58	1.22	20.8	8.1	1.32	.291	4.89	8.74
9	Braves	4.36	2025	162	.469	76	86	162	1,416	1	0	34	1438.0	1,348	696	734	197	530	70	20	6,116	40	8.86	3.32	2.67	1.23	23.2	8.7	1.31	.295	4.59	8.44
10	Cardinals	4.29	2025	162	.481	78	84	162	1,209	2	2	42	1432.0	1,434	682	754	170	461	48	17	6,120	52	7.60	2.90	2.62	1.07	19.8	7.5	1.32	.299	4.74	9.01
11	White Sox	4.26	2025	162	.370	60	102	162	1,286	0	0	25	1416.0	1,336	671	742	189	595	72	29	6,124	48	8.17	3.78	2.16	1.20	21.0	9.7	1.36	.288	4.72	8.49
12	Blue Jays	4.19	2025	162	.580	94	68	162	1,430	2	1	42	1438.0	1,313	669	721	209	517	72	25	6,089	32	8.95	3.24	2.77	1.31	23.5	8.5	1.27	.286	4.51	8.22
13	Mets	4.03	2025	162	.512	83	79	162	1,387	1	1	40	1432.0	1,338	641	715	149	556	80	6	6,153	62	8.72	3.49	2.49	0.94	22.5	9.0	1.32	.299	4.49	8.41
14	Dodgers	3.95	2025	162	.574	93	69	162	1,505	0	0	46	1441.0	1,250	633	683	175	563	65	33	6,077	71	9.40	3.52	2.67	1.09	24.8	9.3	1.26	.285	4.27	7.81
15	Tigers	3.95	2025	162	.537	87	75	162	1,375	1	1	40	1436.1	1,309	630	691	187	485	59	14	6,034	50	8.62	3.04	2.84	1.17	22.8	8.0	1.25	.286	4.33	8.20
16	Rays	3.94	2025	162	.475	77	85	162	1,416	1	0	35	1431.1	1,273	627	683	205	474	67	11	5,960	33	8.90	2.98	2.99	1.29	23.8	8.0	1.22	.281	4.29	8.00
17	Yankees	3.91	2025	162	.580	94	68	162	1,440	0	0	43	1439.2	1,239	625	685	175	557	57	12	6,080	53	9.00	3.48	2.59	1.09	23.7	9.2	1.25	.276	4.28	7.75
18	Mariners	3.87	2025	162	.556	90	72	162	1,426	0	0	43	1462.2	1,331	629	694	192	454	74	26	6,134	53	8.77	2.79	3.14	1.18	23.2	7.4	1.22	.286	4.27	8.19
19	Reds	3.86	2025	162	.512	83	79	162	1,380	4	3	41	1435.0	1,260	616	681	190	494	67	13	6,035	45	8.66	3.10	2.79	1.19	22.9	8.2	1.22	.274	4.27	7.90
20	Astros	3.86	2025	162	.537	87	75	162	1,504	3	0	45	1442.0	1,257	619	665	199	508	58	7	6,041	38	9.39	3.17	2.96	1.24	24.9	8.4	1.22	.280	4.15	7.85
21	Giants	3.82	2025	162	.500	81	81	162	1,358	1	0	41	1433.2	1,353	609	684	143	506	69	18	6,095	51	8.52	3.18	2.68	0.90	22.3	8.3	1.30	.301	4.29	8.49
22	Cubs	3.79	2025	162	.568	92	70	162	1,265	0	0	44	1435.0	1,284	605	649	202	405	53	9	5,904	29	7.93	2.54	3.12	1.27	21.4	6.9	1.18	.272	4.07	8.05
23	Phillies	3.79	2025	162	.593	96	66	162	1,471	2	0	47	1440.1	1,342	607	648	177	435	52	9	6,026	36	9.19	2.72	3.38	1.11	24.4	7.2	1.23	.299	4.05	8.39
24	Pirates	3.76	2025	162	.438	71	91	162	1,314	1	0	36	1430.2	1,267	598	645	153	473	73	18	5,982	46	8.27	2.98	2.78	0.96	22.0	7.9	1.22	.281	4.06	7.97
25	Royals	3.73	2025	162	.506	82	80	162	1,271	0	0	47	1436.2	1,308	596	637	171	478	45	17	5,997	54	7.96	2.99	2.66	1.07	21.2	8.0	1.24	.282	3.99	8.19