Between the 2021 and 2023 seasons, Justin Verlander had the lowest ERA, with an ERA of 2.45.

Interpreted as:

Best closer era with a minimum of 0.5 IP per team game by a player 2021 to 2023

	NAME	ERA	G	W	L	W%	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Justin Verlander J. Verlander	2.45	55	31	12	.721	55	329	0	0	0	337.1	255	92	106	30	74	11	0	0	1,335	8	8.78	1.97	4.45	0.80	24.6	5.5	0.98	.253	2.83	60	3.14	76	6.80	35.9
2	Trevor Bauer T. Bauer	2.59	17	8	5	.615	17	137	1	0	0	107.2	71	31	36	19	37	3	0	1	432	3	11.45	3.09	3.70	1.59	31.7	8.6	1.00	.220	3.01	64	4.03	94	5.93	3.1
3	Brandon Woodruff B. Woodruff	2.70	68	27	15	.643	68	475	1	1	0	399.2	292	120	127	45	100	15	0	0	1,581	4	10.70	2.25	4.75	1.01	30.0	6.3	0.98	.261	2.86	65	3.11	74	6.58	48.6
4	Max Fried M. Fried	2.71	72	36	15	.706	72	408	3	3	0	428.2	365	129	140	34	91	13	0	2	1,711	19	8.57	1.91	4.48	0.71	23.8	5.3	1.06	.284	2.94	64	3.01	73	7.66	52.6
5	Clayton Kershaw C. Kershaw	2.75	68	35	16	.686	68	418	0	0	0	379.2	299	116	126	44	84	8	0	0	1,504	13	9.91	1.99	4.98	1.04	27.8	5.6	1.01	.268	2.99	67	3.21	75	7.09	44.1
6	Drew Rasmussen D. Rasmussen	2.80	71	19	10	.655	46	245	0	0	1	266.2	214	83	91	20	67	4	9	2	1,068	16	8.27	2.26	3.66	0.68	22.9	6.3	1.05	.265	3.07	72	3.08	78	7.22	26.1
7	Max Scherzer M. Scherzer	2.83	80	38	15	.717	80	583	1	0	0	477.1	353	150	157	64	105	25	0	0	1,879	5	10.99	1.98	5.55	1.21	31.0	5.6	0.96	.262	2.96	69	3.29	78	6.66	48
8	Shohei Ohtani S. Ohtani	2.84	74	34	16	.680	74	542	1	1	0	428.1	307	135	143	47	143	23	0	2	1,724	36	11.39	3.00	3.79	0.99	31.4	8.3	1.05	.268	3.00	67	3.23	75	6.45	47.8
9	Walker Buehler W. Buehler	2.84	45	22	7	.759	45	270	1	1	0	272.2	216	86	91	27	69	8	0	2	1,089	6	8.91	2.28	3.91	0.89	24.8	6.3	1.05	.264	3.00	71	3.30	78	7.13	27.7
10	Corbin Burnes C. Burnes	2.94	93	33	21	.611	93	677	0	0	0	562.2	408	184	197	52	151	27	0	0	2,238	25	10.83	2.42	4.48	0.83	30.3	6.7	0.99	.267	3.15	70	2.92	69	6.53	82
11	Lance McCullers Jr. L. McCullers Jr.	2.96	36	17	7	.708	36	235	0	0	0	210.0	159	69	71	17	98	10	0	0	879	8	10.07	4.20	2.40	0.73	26.7	11.1	1.22	.274	3.04	71	3.51	84	6.81	15.2
12	Kodai Senga K. Senga	2.98	29	12	7	.632	29	202	0	0	0	166.1	126	55	60	17	77	5	0	0	694	14	10.93	4.17	2.62	0.92	29.1	11.1	1.22	.277	3.25	71	3.63	84	6.82	13
13	Tanner Bibee T. Bibee	2.98	25	10	4	.714	25	141	0	0	0	142.0	122	47	49	13	45	5	0	0	585	7	8.94	2.85	3.13	0.82	24.1	7.7	1.18	.286	3.11	70	3.51	83	7.73	11.5
14	Shane McClanahan S. McClanahan	3.02	74	33	16	.673	74	456	0	0	0	404.2	331	136	143	48	116	5	0	1	1,627	19	10.14	2.58	3.93	1.07	28.0	7.1	1.10	.282	3.18	77	3.35	84	7.36	29.1
15	Joe Musgrove J. Musgrove	3.05	79	31	19	.620	78	484	2	2	0	459.2	386	156	170	54	117	41	1	5	1,887	9	9.48	2.29	4.14	1.06	25.6	6.2	1.09	.279	3.33	78	3.61	88	7.56	26.4
16	Julio Urías J. Urías	3.07	84	48	18	.727	84	478	0	0	0	478.0	390	163	179	66	103	18	0	3	1,916	4	9.00	1.94	4.64	1.24	24.9	5.4	1.03	.259	3.37	75	3.72	88	7.34	27.3
17	Logan Webb L. Webb	3.07	92	36	23	.610	91	515	2	1	0	556.2	503	190	212	40	116	20	0	0	2,233	9	8.33	1.88	4.44	0.65	23.1	5.2	1.11	.300	3.43	76	2.99	74	8.13	66.2
18	Zack Wheeler Z. Wheeler	3.08	90	39	23	.629	90	622	3	2	0	558.1	462	191	206	49	119	24	0	2	2,243	8	10.03	1.92	5.23	0.79	27.7	5.3	1.04	.289	3.32	73	2.86	66	7.45	88.2
19	Nestor Cortes N. Cortes	3.09	62	19	9	.679	54	333	1	1	0	314.2	242	108	112	41	83	7	3	0	1,255	3	9.52	2.37	4.01	1.17	26.5	6.6	1.03	.254	3.20	76	3.59	86	6.92	20.2
20	Kevin Gausman K. Gausman	3.10	95	38	25	.603	95	669	0	0	0	551.2	501	190	210	54	133	8	0	1	2,263	12	10.91	2.17	5.03	0.88	29.6	5.9	1.15	.320	3.43	77	2.79	68	8.17	82
21	Gerrit Cole G. Cole	3.11	96	44	20	.688	96	722	4	3	0	591.0	462	204	214	77	139	11	0	0	2,340	11	10.99	2.12	5.19	1.17	30.9	5.9	1.02	.277	3.26	76	3.19	76	7.04	68
22	Framber Valdez F. Valdez	3.13	84	40	23	.635	84	519	6	3	0	534.0	442	186	209	42	182	32	0	1	2,207	26	8.75	3.07	2.85	0.71	23.5	8.2	1.17	.279	3.52	76	3.46	84	7.45	39
23	Sandy Alcantara S. Alcantara	3.14	93	30	36	.455	93	559	10	2	0	619.0	521	216	243	59	148	24	0	3	2,485	13	8.13	2.15	3.78	0.86	22.5	6.0	1.08	.273	3.53	74	3.43	83	7.58	48.2
24	Eury Pérez E. Pérez	3.15	19	5	6	.455	19	108	0	0	0	91.1	72	32	35	15	31	2	0	0	374	6	10.64	3.05	3.48	1.48	28.9	8.3	1.13	.261	3.45	71	4.11	94	7.09	2.7
25	Blake Snell B. Snell	3.15	83	29	25	.537	83	575	0	0	0	436.2	319	153	159	42	219	8	0	1	1,827	26	11.85	4.51	2.63	0.87	31.5	12.0	1.23	.282	3.28	79	3.36	80	6.57	40