The Boston Red Sox had an ERA of 4.44 in the AL between the 2021 and 2023 seasons.

	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	Red Sox	4.44	486	.510	248	238	486	4,296	5	2	130	4280.0	4,236	2,110	2,312	569	1,569	234	69	18,482	172	9.03	3.30	2.74	1.20	23.2	8.5	1.36	.310	4.86	8.91
2	White Sox	4.17	486	.484	235	251	486	4,508	8	4	119	4282.2	3,907	1,986	2,194	562	1,672	193	45	18,307	212	9.47	3.51	2.70	1.18	24.6	9.1	1.30	.294	4.61	8.21
3	Guardians	3.92	486	.510	248	238	486	4,092	2	0	137	4308.0	3,885	1,874	2,058	561	1,491	167	35	18,101	162	8.55	3.11	2.74	1.17	22.6	8.2	1.25	.282	4.30	8.12
4	Tigers	4.20	486	.455	221	265	486	3,828	2	1	121	4281.2	4,026	1,998	2,209	553	1,558	189	27	18,284	190	8.05	3.27	2.46	1.16	20.9	8.5	1.30	.286	4.64	8.46
5	Orioles	4.56	486	.486	236	250	486	3,879	3	2	121	4289.0	4,258	2,171	2,322	606	1,479	195	36	18,408	199	8.14	3.10	2.62	1.27	21.1	8.0	1.34	.298	4.87	8.93
6	Athletics	4.67	486	.403	196	290	486	3,835	3	3	101	4279.0	4,220	2,222	2,381	599	1,636	236	81	18,565	201	8.07	3.44	2.34	1.26	20.7	8.8	1.37	.295	5.01	8.88
7	Twins	4.22	486	.490	238	248	486	4,213	3	2	108	4307.2	4,006	2,022	2,177	617	1,395	191	48	18,150	149	8.80	2.91	3.02	1.29	23.2	7.7	1.25	.289	4.55	8.37
8	Yankees	3.67	486	.562	273	213	486	4,467	7	6	138	4326.2	3,692	1,763	1,934	548	1,444	206	26	18,015	185	9.29	3.00	3.09	1.14	24.8	8.0	1.19	.277	4.02	7.68
9	Angels	4.37	486	.459	223	263	486	4,281	4	3	119	4289.0	4,009	2,084	2,301	565	1,768	224	82	18,539	190	8.98	3.71	2.42	1.19	23.1	9.5	1.35	.294	4.83	8.41
10	Rangers	4.43	486	.449	218	268	486	3,904	4	2	97	4295.2	4,077	2,114	2,274	599	1,585	191	46	18,295	179	8.18	3.32	2.46	1.25	21.3	8.7	1.32	.289	4.76	8.54
11	Astros	3.54	486	.599	291	195	486	4,440	7	3	128	4335.2	3,664	1,704	1,874	522	1,544	205	24	18,026	165	9.22	3.21	2.88	1.08	24.6	8.6	1.20	.278	3.89	7.61
12	Royals	4.84	486	.401	195	291	486	3,805	4	0	98	4242.1	4,297	2,280	2,457	569	1,733	206	39	18,515	241	8.07	3.68	2.20	1.21	20.6	9.4	1.42	.306	5.21	9.12
13	Mariners	3.87	486	.551	268	218	486	4,178	3	1	134	4336.2	3,933	1,867	2,030	567	1,353	182	69	18,098	144	8.67	2.81	3.09	1.18	23.1	7.5	1.22	.285	4.21	8.16
14	Blue Jays	3.85	486	.560	272	214	486	4,386	2	2	131	4298.1	3,939	1,840	2,013	587	1,385	213	54	18,069	125	9.18	2.90	3.17	1.23	24.3	7.7	1.24	.292	4.21	8.25
15	Rays	3.65	486	.586	285	201	486	4,369	1	0	131	4333.1	3,782	1,755	1,930	533	1,259	184	52	17,922	183	9.07	2.61	3.47	1.11	24.4	7.0	1.16	.281	4.01	7.85