Jeffrey Springs had the lowest ERA by a starting pitcher with an ERA worse than 0.00 in 2023, with an ERA of 0.56.

	NAME	ERA	SEASON	TM	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	H/9
1	Jeffrey Springs J. Springs	0.56	2023	TBR	3	2	0	1.000	3	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	2.25
2	Trevor Kelley T. Kelley	1.42	2023	TBR	3	0	0		3	4	0	0	0	6.1	4	1	1	1	0	1	0	0	24	1	5.68	0.00		1.42	16.7	0.0	0.63	.167	1.42	5.68
3	Steven Cruz S. Cruz	1.59	2023	KCR	4	0	0		4	7	0	0	0	5.2	7	1	1	0	4	0	0	0	28	0	11.12	6.35	1.75	0.00	25.0	14.3	1.94	.412	1.59	11.12
4	Joe Boyle J. Boyle	1.69	2023	OAK	3	2	0	1.000	3	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	4.50
5	Ryan Pepiot R. Pepiot	2.00	2023	LAD	3	2	1	.667	3	11	0	0	0	18.0	9	4	4	2	1	1	0	0	64	0	5.50	0.50	11.00	1.00	17.2	1.6	0.56	.143	2.00	4.50
6	Brennan Bernardino B. Bernardino	2.00	2023	BOS	6	0	0		6	14	0	0	0	9.0	7	2	2	0	2	3	0	0	38	0	14.00	2.00	7.00	0.00	36.8	5.3	1.00	.368	2.00	7.00
7	Tommy Milone T. Milone	2.00	2023	SEA	2	0	1	.000	2	3	0	0	0	9.0	7	2	3	1	6	0	0	0	40	0	3.00	6.00	0.50	1.00	7.5	15.0	1.44	.200	3.00	7.00
8	Ryan Walker R. Walker	2.21	2023	SFG	13	0	1	.000	13	32	0	0	0	20.1	19	5	6	3	12	1	0	0	89	1	14.16	5.31	2.67	1.33	36.0	13.5	1.52	.390	2.66	8.41
9	Michael King M. King	2.23	2023	NYY	9	1	4	.200	9	51	0	0	0	40.1	37	10	12	4	9	0	0	0	163	2	11.38	2.01	5.67	0.89	31.3	5.5	1.14	.333	2.68	8.26
10	Kenny Rosenberg K. Rosenberg	2.25	2023	LAA	3	2	1	.667	3	13	0	0	0	16.0	18	4	4	1	5	0	0	1	68	0	7.31	2.81	2.60	0.56	19.1	7.4	1.44	.347	2.25	10.13
11	Shawn Dubin S. Dubin	2.25	2023	HOU	1	0	0		1	3	0	0	0	4.0	3	1	1	0	2	1	0	0	17	0	6.75	4.50	1.50	0.00	17.6	11.8	1.25	.273	2.25	6.75
12	Devin Smeltzer D. Smeltzer	2.25	2023	MIA	1	0	0		1	3	0	0	0	4.0	3	1	1	0	1	0	0	0	15	1	6.75	2.25	3.00	0.00	20.0	6.7	1.00	.273	2.25	6.75
13	Blake Snell B. Snell	2.25	2023	SDP	32	14	9	.609	32	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	5.75
14	Brandon Woodruff B. Woodruff	2.28	2023	MIL	11	5	1	.833	11	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	5.37
15	John Brebbia J. Brebbia	2.31	2023	SFG	10	0	2	.000	10	13	0	0	0	11.2	8	3	3	3	5	0	0	0	48	0	10.03	3.86	2.60	2.31	27.1	10.4	1.11	.185	2.31	6.17
16	Nick Martinez N. Martinez	2.32	2023	SDP	9	2	1	.667	9	37	0	0	0	42.2	28	11	11	4	18	0	0	0	171	2	7.80	3.80	2.06	0.84	21.6	10.5	1.08	.214	2.32	5.91
17	Randy Vásquez R. Vásquez	2.42	2023	NYY	5	1	2	.333	5	16	0	0	0	22.1	14	6	6	3	11	3	0	0	95	1	6.45	4.43	1.45	1.21	16.8	11.6	1.12	.177	2.42	5.64
18	Derek Law D. Law	2.45	2023	CIN	3	0	1	.000	3	2	0	0	0	3.2	3	1	1	0	2	1	0	0	16	1	4.91	4.91	1.00	0.00	12.5	12.5	1.36	.273	2.45	7.36
19	Clayton Kershaw C. Kershaw	2.46	2023	LAD	24	13	5	.722	24	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	6.84
20	Max Fried M. Fried	2.55	2023	ATL	14	8	1	.889	14	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	8.11
21	Drew Rasmussen D. Rasmussen	2.62	2023	TBR	8	4	2	.667	8	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	7.25
22	Dustin May D. May	2.63	2023	LAD	9	4	1	.800	9	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	5.44
23	Gerrit Cole G. Cole	2.63	2023	NYY	33	15	4	.789	33	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	6.76
24	Cole Ragans C. Ragans	2.64	2023	KCR	12	5	2	.714	12	89	0	0	0	71.2	50	21	23	3	27	1	0	0	286	4	11.18	3.39	3.30	0.38	31.1	9.4	1.07	.283	2.89	6.28
25	John Means J. Means	2.66	2023	BAL	4	1	2	.333	4	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	4.94