Since May 7, 2022, the Houston Astros have the best ERA by a team, with an ERA of 3.63.

	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	Astros	3.63	620	.573	355	265	5,757	4	175	5526.1	4,739	2,229	2,438	694	1,972	237	20	23,055	171	9.38	3.21	2.92	1.13	25.0	8.6	1.21	.281	3.97	7.72
2	Guardians	3.67	622	.540	336	286	5,288	1	193	5551.1	4,932	2,264	2,492	669	1,916	210	51	23,199	189	8.57	3.11	2.76	1.08	22.8	8.3	1.23	.282	4.04	8.00
3	Mariners	3.67	621	.549	341	280	5,468	1	157	5557.0	4,874	2,269	2,475	713	1,604	230	88	22,941	171	8.86	2.60	3.41	1.15	23.8	7.0	1.17	.279	4.01	7.89
4	Brewers	3.72	621	.562	349	272	5,476	1	183	5538.0	4,806	2,289	2,520	733	1,950	248	62	23,179	163	8.90	3.17	2.81	1.19	23.6	8.4	1.22	.276	4.10	7.81
5	Dodgers	3.73	625	.618	386	239	5,539	1	175	5580.2	4,783	2,314	2,524	711	1,872	257	85	23,205	216	8.93	3.02	2.96	1.15	23.9	8.1	1.19	.275	4.07	7.71
6	Rays	3.76	621	.523	325	296	5,471	0	167	5510.2	4,887	2,303	2,514	723	1,668	250	49	22,924	169	8.94	2.72	3.28	1.18	23.9	7.3	1.19	.281	4.11	7.98
7	Yankees	3.77	623	.563	351	272	5,565	4	169	5559.0	4,777	2,331	2,548	692	1,966	284	34	23,301	185	9.01	3.18	2.83	1.12	23.9	8.4	1.21	.276	4.13	7.73
8	Padres	3.78	621	.541	336	285	5,541	3	164	5515.2	4,837	2,314	2,496	668	1,936	286	59	23,150	190	9.04	3.16	2.86	1.09	23.9	8.4	1.23	.283	4.07	7.89
9	Braves	3.85	620	.577	358	262	5,787	3	172	5524.1	4,978	2,363	2,545	660	1,912	257	72	23,213	173	9.43	3.11	3.03	1.08	24.9	8.2	1.25	.296	4.15	8.11
10	Phillies	3.90	622	.574	357	265	5,560	6	166	5525.2	5,123	2,397	2,605	671	1,732	217	38	23,192	160	9.06	2.82	3.21	1.09	24.0	7.5	1.24	.297	4.24	8.34
11	Cubs	3.91	624	.518	323	301	5,170	1	154	5539.1	5,062	2,404	2,669	738	1,867	231	38	23,309	173	8.40	3.03	2.77	1.20	22.2	8.0	1.25	.283	4.34	8.22
12	Giants	3.97	622	.494	307	315	5,292	4	156	5503.2	5,269	2,427	2,702	586	1,806	256	64	23,337	204	8.65	2.95	2.93	0.96	22.7	7.7	1.29	.304	4.42	8.62
13	Tigers	3.98	623	.496	309	314	5,123	2	159	5528.0	5,039	2,442	2,684	677	1,819	221	41	23,219	194	8.34	2.96	2.82	1.10	22.1	7.8	1.24	.284	4.37	8.20
14	Mets	3.99	620	.531	329	291	5,525	2	145	5479.1	4,989	2,431	2,651	649	2,085	320	36	23,303	217	9.08	3.42	2.65	1.07	23.7	8.9	1.29	.295	4.35	8.19
15	Blue Jays	4.05	621	.536	333	288	5,434	3	162	5518.0	5,089	2,482	2,704	770	1,863	275	94	23,286	128	8.86	3.04	2.92	1.26	23.3	8.0	1.26	.289	4.41	8.30
16	Rangers	4.07	624	.492	307	317	5,163	3	137	5529.0	5,046	2,503	2,695	704	1,975	241	84	23,336	203	8.40	3.21	2.61	1.15	22.1	8.5	1.27	.285	4.39	8.21
17	Orioles	4.11	622	.547	340	282	5,187	1	175	5534.2	5,263	2,529	2,744	717	1,835	215	52	23,432	211	8.43	2.98	2.83	1.17	22.1	7.8	1.28	.294	4.46	8.56
18	Twins	4.20	621	.485	301	320	5,531	2	132	5518.1	5,160	2,578	2,762	732	1,731	261	67	23,296	191	9.02	2.82	3.20	1.19	23.7	7.4	1.25	.294	4.50	8.42
19	Red Sox	4.21	621	.509	316	305	5,241	4	161	5521.2	5,323	2,585	2,874	715	1,919	292	75	23,632	200	8.54	3.13	2.73	1.17	22.2	8.1	1.31	.298	4.68	8.68
20	Cardinals	4.27	622	.497	309	313	4,709	3	163	5511.0	5,480	2,617	2,859	651	1,862	201	49	23,512	194	7.69	3.04	2.53	1.06	20.0	7.9	1.33	.300	4.67	8.95
21	Pirates	4.28	624	.441	275	349	5,096	2	153	5510.1	5,251	2,619	2,865	639	2,080	317	77	23,722	197	8.32	3.40	2.45	1.04	21.5	8.8	1.33	.296	4.68	8.58
22	Reds	4.32	623	.483	301	322	5,336	4	158	5515.2	5,119	2,645	2,845	787	2,086	332	59	23,649	180	8.71	3.40	2.56	1.28	22.6	8.8	1.31	.287	4.64	8.35
23	Royals	4.33	625	.450	281	344	4,911	0	145	5484.2	5,341	2,640	2,841	675	2,007	251	54	23,518	241	8.06	3.29	2.45	1.11	20.9	8.5	1.34	.298	4.66	8.76
24	Marlins	4.39	622	.453	282	340	5,306	3	148	5524.1	5,271	2,694	2,938	734	1,996	298	75	23,653	194	8.64	3.25	2.66	1.20	22.4	8.4	1.32	.296	4.79	8.59
25	White Sox	4.47	623	.371	231	392	5,330	1	112	5494.1	5,253	2,728	3,014	753	2,320	257	79	23,865	222	8.73	3.80	2.30	1.23	22.3	9.7	1.38	.296	4.94	8.60