Since May 1, 2023, the Milwaukee Brewers have the best ERA by a team, with an ERA of 3.66.

	TEAM	ERA	G	W%	W	L	SO	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	458	.576	264	194	4,016	1	135	4080.0	3,526	1,660	1,822	532	1,437	179	49	17,065	122	8.86	3.17	2.79	1.17	23.5	8.4	1.22	.275	4.02	7.78
2	Padres	3.69	457	.547	250	207	4,077	3	117	4056.2	3,517	1,663	1,804	483	1,449	195	53	16,983	140	9.05	3.21	2.81	1.07	24.0	8.5	1.22	.281	4.00	7.80
3	Mariners	3.71	458	.548	251	207	4,052	1	111	4090.1	3,578	1,685	1,841	538	1,157	175	55	16,873	124	8.92	2.55	3.50	1.18	24.0	6.9	1.16	.278	4.05	7.87
4	Guardians	3.74	457	.532	243	214	3,887	1	136	4060.1	3,618	1,686	1,842	495	1,471	158	37	17,040	132	8.62	3.26	2.64	1.10	22.8	8.6	1.25	.283	4.08	8.02
5	Phillies	3.86	457	.582	266	191	4,094	5	121	4072.1	3,772	1,748	1,904	515	1,252	157	24	17,080	112	9.05	2.77	3.27	1.14	24.0	7.3	1.23	.294	4.21	8.34
6	Yankees	3.88	457	.558	255	202	4,059	2	127	4077.0	3,576	1,757	1,937	520	1,504	213	27	17,225	144	8.96	3.32	2.70	1.15	23.6	8.7	1.25	.280	4.28	7.89
7	Tigers	3.88	459	.525	241	218	3,892	2	120	4083.2	3,675	1,762	1,938	493	1,296	155	32	17,058	132	8.58	2.86	3.00	1.09	22.8	7.6	1.22	.284	4.27	8.10
8	Astros	3.89	457	.547	250	207	4,173	3	122	4067.2	3,586	1,756	1,906	555	1,510	181	14	17,124	115	9.23	3.34	2.76	1.23	24.4	8.8	1.25	.283	4.22	7.93
9	Cubs	3.90	459	.532	244	215	3,741	1	114	4063.0	3,717	1,761	1,938	539	1,312	153	19	17,024	117	8.29	2.91	2.85	1.19	22.0	7.7	1.24	.282	4.29	8.23
10	Rays	3.91	457	.510	233	224	4,077	0	126	4055.1	3,619	1,760	1,919	559	1,270	179	34	16,917	117	9.05	2.82	3.21	1.24	24.1	7.5	1.21	.282	4.26	8.03
11	Giants	3.94	459	.499	229	230	3,903	3	119	4061.1	3,832	1,776	1,958	428	1,361	199	48	17,184	152	8.65	3.02	2.87	0.95	22.7	7.9	1.28	.301	4.34	8.49
12	Dodgers	3.95	457	.602	275	182	4,051	1	131	4079.0	3,557	1,788	1,939	543	1,444	179	71	17,066	179	8.94	3.19	2.81	1.20	23.7	8.5	1.23	.278	4.28	7.85
13	Red Sox	4.03	457	.510	233	224	3,892	2	120	4075.0	3,853	1,824	2,048	521	1,402	213	64	17,360	141	8.60	3.10	2.78	1.15	22.4	8.1	1.29	.294	4.52	8.51
14	Braves	4.03	459	.547	251	208	4,234	1	119	4083.1	3,756	1,830	1,962	514	1,430	198	51	17,235	120	9.33	3.15	2.96	1.13	24.6	8.3	1.27	.299	4.32	8.28
15	Rangers	4.07	458	.507	232	226	3,821	1	100	4060.0	3,680	1,836	1,953	547	1,407	172	66	17,064	135	8.47	3.12	2.72	1.21	22.4	8.2	1.25	.282	4.33	8.16
16	Mets	4.08	459	.505	232	227	4,009	2	106	4057.2	3,692	1,840	2,027	466	1,630	245	25	17,360	182	8.89	3.62	2.46	1.03	23.1	9.4	1.31	.293	4.50	8.19
17	Blue Jays	4.10	458	.522	239	219	3,999	3	118	4068.0	3,744	1,852	2,017	580	1,425	193	77	17,203	102	8.85	3.15	2.81	1.28	23.2	8.3	1.27	.287	4.46	8.28
18	Royals	4.13	457	.475	217	240	3,633	0	111	4021.0	3,777	1,846	1,980	483	1,406	175	43	17,036	151	8.13	3.15	2.58	1.08	21.3	8.3	1.29	.291	4.43	8.45
19	Orioles	4.14	458	.541	248	210	3,899	0	124	4078.2	3,836	1,877	2,043	539	1,388	153	40	17,279	161	8.60	3.06	2.81	1.19	22.6	8.0	1.28	.292	4.51	8.46
20	Pirates	4.21	457	.444	203	254	3,782	2	113	4040.2	3,778	1,891	2,066	475	1,486	233	52	17,270	130	8.42	3.31	2.55	1.06	21.9	8.6	1.30	.292	4.60	8.41
21	Reds	4.22	458	.502	230	228	3,866	3	124	4059.0	3,725	1,904	2,057	577	1,493	225	39	17,321	123	8.57	3.31	2.59	1.28	22.3	8.6	1.29	.282	4.56	8.26
22	Twins	4.27	457	.486	222	235	4,147	2	100	4059.2	3,822	1,927	2,059	551	1,259	194	48	17,163	135	9.19	2.79	3.29	1.22	24.2	7.3	1.25	.297	4.56	8.47
23	Cardinals	4.36	457	.486	222	235	3,468	2	129	4051.2	4,084	1,965	2,166	490	1,340	144	37	17,330	142	7.70	2.98	2.59	1.09	20.0	7.7	1.34	.302	4.81	9.07
24	White Sox	4.52	457	.337	154	303	3,837	0	71	4015.1	3,828	2,015	2,213	556	1,768	195	66	17,501	164	8.60	3.96	2.17	1.25	21.9	10.1	1.39	.294	4.96	8.58
25	Diamondbacks	4.52	457	.519	237	220	3,718	1	117	4068.2	4,013	2,042	2,194	540	1,394	150	65	17,394	108	8.22	3.08	2.67	1.19	21.4	8.0	1.33	.300	4.85	8.88