Since 2023, the Milwaukee Brewers have the lowest ERA by a team, with an ERA of 3.66.

	TEAM	ERA	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	Brewers	3.66	483	.582	281	202	483	4,200	1	1	143	4304.0	3,720	1,749	1,910	559	1,510	189	51	17,992	127	8.78	3.16	2.78	1.17	23.3	8.4	1.22	.274	3.99	7.78
2	Mariners	3.70	482	.544	262	220	482	4,258	3	1	120	4309.0	3,775	1,771	1,944	554	1,233	182	64	17,793	130	8.89	2.58	3.45	1.16	23.9	6.9	1.16	.278	4.06	7.88
3	Guardians	3.75	481	.528	254	227	481	4,062	3	1	147	4277.0	3,834	1,781	1,946	515	1,545	162	39	17,964	149	8.55	3.25	2.63	1.08	22.6	8.6	1.26	.284	4.09	8.07
4	Padres	3.75	483	.542	262	221	483	4,290	3	3	127	4286.1	3,740	1,786	1,929	517	1,538	207	53	17,976	149	9.01	3.23	2.79	1.09	23.9	8.6	1.23	.282	4.05	7.85
5	Rays	3.83	483	.530	256	227	483	4,302	1	0	131	4290.0	3,788	1,827	1,989	572	1,348	195	36	17,868	128	9.03	2.83	3.19	1.20	24.1	7.5	1.20	.281	4.17	7.95
6	Astros	3.85	481	.545	262	219	481	4,407	7	3	129	4284.1	3,778	1,834	2,000	578	1,576	194	15	18,025	123	9.26	3.31	2.80	1.21	24.4	8.7	1.25	.284	4.20	7.94
7	Yankees	3.88	482	.552	266	216	482	4,297	3	3	130	4296.0	3,763	1,854	2,041	545	1,585	227	27	18,145	152	9.00	3.32	2.71	1.14	23.7	8.7	1.24	.280	4.28	7.88
8	Cubs	3.89	482	.529	255	227	482	3,946	2	1	116	4266.2	3,886	1,846	2,029	558	1,395	165	21	17,880	126	8.32	2.94	2.83	1.18	22.1	7.8	1.24	.282	4.28	8.20
9	Phillies	3.91	482	.577	278	204	482	4,314	8	5	127	4288.1	3,974	1,863	2,027	539	1,338	165	24	18,007	119	9.05	2.81	3.22	1.13	24.0	7.4	1.24	.295	4.25	8.34
10	Tigers	3.94	482	.517	249	233	482	4,065	2	2	124	4291.1	3,865	1,880	2,062	531	1,369	166	33	17,938	141	8.53	2.87	2.97	1.11	22.7	7.6	1.22	.282	4.32	8.11
11	Braves	3.99	483	.555	268	215	483	4,460	4	2	125	4294.1	3,937	1,906	2,044	530	1,503	207	52	18,112	129	9.35	3.15	2.97	1.11	24.6	8.3	1.27	.299	4.28	8.25
12	Dodgers	4.00	482	.595	287	195	482	4,230	1	1	135	4297.0	3,782	1,908	2,062	572	1,508	191	70	17,996	182	8.86	3.16	2.81	1.20	23.5	8.4	1.23	.279	4.32	7.92
13	Giants	4.00	483	.491	237	246	483	4,119	7	4	121	4275.0	4,070	1,900	2,096	465	1,430	209	51	18,127	163	8.67	3.01	2.88	0.98	22.7	7.9	1.29	.303	4.41	8.57
14	Rangers	4.03	483	.513	248	235	483	4,038	5	2	104	4280.1	3,865	1,916	2,044	564	1,475	181	68	17,964	144	8.49	3.10	2.74	1.19	22.5	8.2	1.25	.282	4.30	8.13
15	Red Sox	4.10	482	.510	246	236	482	4,100	3	2	126	4296.0	4,080	1,955	2,185	558	1,473	230	64	18,323	151	8.59	3.09	2.78	1.17	22.4	8.0	1.29	.294	4.58	8.55
16	Mets	4.10	482	.508	245	237	482	4,208	3	2	112	4256.2	3,875	1,938	2,126	500	1,728	255	26	18,227	187	8.90	3.65	2.44	1.06	23.1	9.5	1.32	.293	4.50	8.19
17	Blue Jays	4.10	482	.525	253	229	482	4,230	6	3	128	4281.0	3,929	1,952	2,127	612	1,493	204	79	18,090	104	8.89	3.14	2.83	1.29	23.4	8.3	1.27	.287	4.47	8.26
18	Orioles	4.13	483	.553	267	216	483	4,136	1	0	133	4304.1	4,048	1,977	2,148	561	1,466	163	44	18,232	173	8.65	3.07	2.82	1.17	22.7	8.0	1.28	.293	4.49	8.46
19	Pirates	4.18	483	.458	221	262	483	4,005	4	2	125	4273.1	3,997	1,986	2,166	495	1,575	239	59	18,276	139	8.43	3.32	2.54	1.04	21.9	8.6	1.30	.293	4.56	8.42
20	Royals	4.22	482	.459	221	261	482	3,837	5	0	115	4238.0	4,012	1,988	2,128	520	1,493	187	43	18,000	158	8.15	3.17	2.57	1.10	21.3	8.3	1.30	.292	4.52	8.52
21	Twins	4.24	483	.493	238	245	483	4,396	4	2	109	4291.2	4,021	2,024	2,162	576	1,331	201	49	18,121	145	9.22	2.79	3.30	1.21	24.3	7.3	1.25	.297	4.53	8.43
22	Reds	4.27	483	.497	240	243	483	4,103	5	3	128	4276.1	3,971	2,028	2,187	606	1,582	237	40	18,298	136	8.64	3.33	2.59	1.28	22.4	8.6	1.30	.286	4.60	8.36
23	Cardinals	4.35	483	.480	232	251	483	3,708	2	2	133	4280.1	4,318	2,070	2,281	514	1,437	152	38	18,330	155	7.80	3.02	2.58	1.08	20.2	7.8	1.34	.304	4.80	9.08
24	Diamondbacks	4.51	482	.525	253	229	482	3,918	1	1	124	4289.2	4,205	2,148	2,302	565	1,491	158	65	18,319	120	8.22	3.13	2.63	1.19	21.4	8.1	1.33	.299	4.83	8.82
25	Marlins	4.53	482	.463	223	259	482	4,061	4	2	115	4281.0	4,121	2,156	2,354	583	1,559	230	58	18,398	145	8.54	3.28	2.60	1.23	22.1	8.5	1.33	.296	4.95	8.66