Jeffrey Springs had the best ERA with 3+ starts in 2023, with an ERA of 0.56.

Interpreted as:

lowest era by a player minimum 3 starts in 2023

	NAME	ERA	GS	SEASON	TM	G	W	L	W%	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	Jeffrey Springs J. Springs	0.56	3	2023	TBR	3	2	0	1.000	24	0	0	0	16.0	4	1	1	1	4	0	0	0	55	0	13.50	2.25	6.00	0.56	43.6	7.3	0.50	.115	0.56	14	1.81	44	2.25	4.3
2	Miguel Díaz M. Díaz	0.64	3	2023	DET	12	1	0	1.000	16	0	0	0	14.0	8	1	1	0	5	0	0	0	54	0	10.29	3.21	3.20	0.00	29.6	9.3	0.93	.242	0.64	15	2.04	48	5.14	3.5
3	Shawn Armstrong S. Armstrong	1.38	6	2023	TBR	39	1	0	1.000	54	0	0	0	52.0	36	8	12	2	11	4	5	0	207	0	9.35	1.90	4.91	0.35	26.1	5.3	0.90	.250	2.08	34	2.54	61	6.23	9.5
4	Joe Boyle J. Boyle	1.69	3	2023	OAK	3	2	0	1.000	15	0	0	0	16.0	8	3	4	1	5	0	0	0	60	0	8.44	2.81	3.00	0.56	25.0	8.3	0.81	.179	2.25	41	3.13	75	4.50	1.9
5	Ryan Pepiot R. Pepiot	2.14	3	2023	LAD	8	2	1	.667	38	0	0	0	42.0	27	10	10	7	5	3	0	0	159	0	8.14	1.07	7.60	1.50	23.9	3.1	0.76	.189	2.14	50	4.18	94	5.79	1.3
6	Blake Snell B. Snell	2.25	32	2023	SDP	32	14	9	.609	234	0	0	0	180.0	115	45	47	15	99	3	0	0	742	13	11.70	4.95	2.36	0.75	31.5	13.3	1.19	.256	2.35	54	3.43	79	5.75	18
7	Brandon Woodruff B. Woodruff	2.28	11	2023	MIL	11	5	1	.833	74	1	1	0	67.0	40	17	17	9	15	3	0	0	253	0	9.94	2.01	4.93	1.21	29.2	5.9	0.82	.204	2.28	52	3.59	81	5.37	6.1
8	Clayton Kershaw C. Kershaw	2.46	24	2023	LAD	24	13	5	.722	137	0	0	0	131.2	100	36	39	19	40	3	0	0	523	6	9.36	2.73	3.43	1.30	26.2	7.6	1.06	.250	2.67	57	4.03	90	6.84	6.4
9	Max Fried M. Fried	2.55	14	2023	ATL	14	8	1	.889	80	1	1	0	77.2	70	22	24	7	18	2	0	0	311	3	9.27	2.09	4.44	0.81	25.7	5.8	1.13	.309	2.78	58	3.14	73	8.11	10.1
10	Drew Rasmussen D. Rasmussen	2.62	8	2023	TBR	8	4	2	.667	47	0	0	0	44.2	36	13	13	2	11	1	0	0	177	2	9.47	2.22	4.27	0.40	26.6	6.2	1.05	.293	2.62	64	2.54	61	7.25	8.2
11	Dustin May D. May	2.63	9	2023	LAD	9	4	1	.800	34	0	0	0	48.0	29	14	14	1	16	2	0	0	187	1	6.38	3.00	2.13	0.19	18.2	8.6	0.94	.209	2.63	61	3.23	72	5.44	6.5
12	Gerrit Cole G. Cole	2.63	33	2023	NYY	33	15	4	.789	222	2	2	0	209.0	157	61	64	20	48	7	0	0	821	4	9.56	2.07	4.63	0.86	27.0	5.8	0.98	.261	2.76	61	3.16	72	6.76	28.4
13	Ian Hamilton I. Hamilton	2.64	3	2023	NYY	39	3	2	.600	69	0	0	2	58.0	45	17	19	2	26	3	6	1	239	1	10.71	4.03	2.65	0.31	28.9	10.9	1.22	.309	2.95	62	2.82	64	6.98	10
14	John Means J. Means	2.66	4	2023	BAL	4	1	2	.333	10	0	0	0	23.2	13	7	7	4	4	1	0	0	88	0	3.80	1.52	2.50	1.52	11.4	4.5	0.72	.130	2.66	64	5.24	125	4.94	-2.8
15	Jacob deGrom J. deGrom	2.67	6	2023	TEX	6	2	0	1.000	45	0	0	0	30.1	19	9	11	2	4	0	0	0	115	1	13.35	1.19	11.25	0.59	39.1	3.5	0.76	.266	3.26	62	1.54	35	5.64	9.4
16	Sawyer Gipson-Long S. Gipson-Long	2.70	4	2023	DET	4	1	0	1.000	26	0	0	0	20.0	14	6	7	2	8	0	0	0	82	0	11.70	3.60	3.25	0.90	31.7	9.8	1.10	.261	3.15	64	3.15	74	6.30	2.4
17	Michael King M. King	2.75	9	2023	NYY	49	4	8	.333	127	0	0	6	104.2	88	32	35	10	32	5	10	1	431	2	10.92	2.75	3.97	0.86	29.5	7.4	1.15	.304	3.01	64	3.13	71	7.57	14.6
18	Sonny Gray S. Gray	2.79	32	2023	MIN	32	8	8	.500	183	0	0	0	184.0	156	57	59	8	55	6	0	0	754	6	8.95	2.69	3.33	0.39	24.3	7.3	1.15	.295	2.89	65	2.82	66	7.63	29.8
19	Tarik Skubal T. Skubal	2.80	15	2023	DET	15	7	3	.700	102	0	0	0	80.1	58	25	28	4	14	3	0	0	310	1	11.43	1.57	7.29	0.45	32.9	4.5	0.90	.289	3.14	66	1.99	47	6.50	20.2
20	Kyle Bradish K. Bradish	2.83	30	2023	BAL	30	12	7	.632	168	0	0	0	168.2	132	53	54	14	44	8	0	0	671	9	8.96	2.35	3.82	0.75	25.0	6.6	1.04	.270	2.88	67	3.26	78	7.04	17.7
21	Randy Vásquez R. Vásquez	2.87	5	2023	NYY	11	2	2	.500	33	0	0	0	37.2	30	12	12	5	18	4	1	0	166	3	7.88	4.30	1.83	1.19	19.9	10.8	1.27	.236	2.87	67	4.98	113	7.17	-2.3
22	Joey Lucchesi J. Lucchesi	2.89	9	2023	NYM	9	4	0	1.000	32	0	0	0	46.2	44	15	17	4	17	2	0	0	195	1	6.17	3.28	1.88	0.77	16.4	8.7	1.31	.286	3.28	69	4.22	97	8.49	0.6
23	Kodai Senga K. Senga	2.98	29	2023	NYM	29	12	7	.632	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
24	Tanner Bibee T. Bibee	2.98	25	2023	CLE	25	10	4	.714	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
25	Austin Pruitt A. Pruitt	2.98	6	2023	OAK	38	2	6	.250	30	0	0	0	48.1	44	16	18	5	12	1	8	1	196	1	5.59	2.23	2.50	0.93	15.3	6.1	1.16	.264	3.35	73	4.16	100	8.19	-0.1