Paul Skenes has the lowest ERA- this season, with an ERA- of 50.

Interpreted as:

MLB lowest era- with a minimum of 1 IP per team game by a player this regular season

	NAME	ERA-	SEASON	TM	G	W	L	W%	GS	ERA	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	FIP	FIP-	H/9	PRAA
1	Paul Skenes P. Skenes	50	2025	PIT	25	7	9	.438	25	2.13	166	1	0	0	148.0	106	35	38	9	36	6	0	0	581	2	10.09	2.19	4.61	0.55	28.6	6.2	0.96	.266	2.31	2.50	61	6.45	26.3
2	Andrew Abbott A. Abbott	54	2025	CIN	21	8	3	.727	21	2.41	105	1	1	0	123.0	101	33	39	13	35	1	0	0	499	3	7.68	2.56	3.00	0.95	21.0	7.0	1.11	.255	2.85	3.65	84	7.39	9.3
3	Garrett Crochet G. Crochet	58	2025	BOS	24	13	5	.722	24	2.48	188	1	1	0	152.1	127	42	45	13	40	0	0	0	611	5	11.11	2.36	4.70	0.77	30.8	6.5	1.10	.308	2.66	2.53	60	7.50	28.1
4	Cristopher Sánchez C. Sánchez	58	2025	PHI	24	11	4	.733	24	2.45	157	1	0	0	150.2	128	41	43	10	36	6	0	0	609	5	9.38	2.15	4.36	0.60	25.8	5.9	1.09	.295	2.57	2.72	65	7.65	24.1
5	Matthew Boyd M. Boyd	60	2025	CHC	24	11	6	.647	24	2.46	126	0	0	0	142.2	115	39	44	12	30	5	0	0	558	1	7.95	1.89	4.20	0.76	22.6	5.4	1.02	.268	2.78	3.17	79	7.25	13.6
6	Tarik Skubal T. Skubal	60	2025	DET	24	11	3	.786	24	2.42	190	1	1	0	152.1	110	41	41	13	23	4	0	0	581	2	11.23	1.36	8.26	0.77	32.7	4.0	0.87	.276	2.42	2.25	55	6.50	31.9
7	Hunter Brown H. Brown	61	2025	HOU	24	10	5	.667	24	2.45	164	1	0	0	143.0	100	39	40	12	43	5	0	1	558	0	10.32	2.71	3.81	0.76	29.4	7.7	1.00	.263	2.52	2.91	71	6.29	19.4
8	Zack Wheeler Z. Wheeler	64	2025	PHI	23	10	5	.667	23	2.68	189	1	0	0	144.2	103	43	46	18	31	8	0	0	565	1	11.76	1.93	6.10	1.12	33.5	5.5	0.93	.266	2.86	2.92	70	6.41	20
9	Joe Ryan J. Ryan	67	2025	MIN	24	12	5	.706	23	2.72	153	0	0	0	139.0	101	42	44	16	27	11	0	0	543	0	9.91	1.75	5.67	1.04	28.2	5.0	0.92	.253	2.85	3.22	77	6.54	14.6
10	Nick Lodolo N. Lodolo	68	2025	CIN	23	8	6	.571	23	3.05	124	2	1	0	129.2	110	44	46	17	24	11	0	0	526	2	8.61	1.67	5.17	1.18	23.6	4.6	1.03	.266	3.19	3.70	85	7.63	9
11	Freddy Peralta F. Peralta	69	2025	MIL	25	14	5	.737	25	2.90	148	0	0	0	136.2	103	44	45	16	50	8	0	0	566	4	9.75	3.29	2.96	1.05	26.1	8.8	1.12	.253	2.96	3.73	90	6.78	6.2
12	Yoshinobu Yamamoto Y. Yamamoto	69	2025	LAD	23	10	8	.556	23	2.84	145	0	0	0	126.2	94	40	45	11	44	3	0	0	512	4	10.30	3.13	3.30	0.78	28.3	8.6	1.09	.269	3.20	3.05	73	6.68	15.6
13	Jacob deGrom J. deGrom	71	2025	TEX	23	10	5	.667	23	2.86	143	0	0	0	135.1	98	43	43	19	30	2	0	0	525	1	9.51	2.00	4.77	1.26	27.2	5.7	0.95	.239	2.86	3.52	83	6.52	10.7
14	Nick Pivetta N. Pivetta	71	2025	SDP	24	12	4	.750	24	2.87	144	0	0	0	141.1	98	45	49	15	36	2	0	1	555	1	9.17	2.29	4.00	0.96	25.9	6.5	0.95	.232	3.12	3.25	80	6.24	12.7
15	Max Fried M. Fried	73	2025	NYY	24	12	5	.706	24	2.94	135	0	0	0	144.0	122	47	58	11	36	9	0	0	593	7	8.44	2.25	3.75	0.69	22.8	6.1	1.10	.276	3.63	3.16	74	7.62	17.7
16	Robbie Ray R. Ray	73	2025	SFG	25	9	6	.600	25	2.98	152	1	0	0	148.0	112	49	52	17	56	2	0	0	601	5	9.24	3.41	2.71	1.03	25.3	9.3	1.14	.254	3.16	3.72	94	6.81	3.5
17	Framber Valdez F. Valdez	74	2025	HOU	23	11	5	.688	23	2.97	145	2	0	0	145.2	120	48	50	8	49	6	0	0	595	8	8.96	3.03	2.96	0.49	24.4	8.2	1.16	.289	3.09	2.96	72	7.41	18.9
18	Michael Wacha M. Wacha	79	2025	KCR	24	7	9	.438	24	3.35	101	0	0	0	137.0	121	51	51	12	37	3	0	0	563	1	6.64	2.43	2.73	0.79	17.9	6.6	1.15	.266	3.35	3.64	88	7.95	7.9
19	Merrill Kelly M. Kelly	80	2025	TOT	25	9	7	.563	25	3.36	136	0	0	0	144.2	114	54	61	17	44	2	0	0	584	0	8.46	2.74	3.09	1.06	23.3	7.5	1.09	.252	3.79	3.70	92	7.09	4.9
20	Carlos Rodón C. Rodón	80	2025	NYY	25	12	7	.632	25	3.25	164	0	0	0	146.2	98	53	59	19	58	5	0	0	595	4	10.06	3.56	2.83	1.17	27.6	9.7	1.06	.226	3.62	3.84	90	6.01	7.2
21	Bryan Woo B. Woo	81	2025	SEA	23	10	6	.625	23	3.08	145	0	0	0	146.0	113	50	53	22	26	3	0	0	574	2	8.94	1.60	5.58	1.36	25.3	4.5	0.95	.241	3.27	3.67	92	6.97	5.2
22	Yusei Kikuchi Y. Kikuchi	81	2025	LAA	25	6	7	.462	25	3.37	146	0	0	0	139.0	140	52	60	17	58	2	0	3	601	6	9.45	3.76	2.52	1.10	24.3	9.7	1.42	.325	3.88	3.89	91	9.06	6.1
23	David Peterson D. Peterson	82	2025	NYM	23	7	5	.583	23	3.30	117	1	1	0	136.1	124	50	55	9	50	6	0	1	572	3	7.72	3.30	2.34	0.59	20.5	8.7	1.28	.295	3.63	3.48	86	8.19	8.8
24	Logan Webb L. Webb	82	2025	SFG	25	10	9	.526	25	3.34	168	0	0	0	153.2	158	57	61	11	35	4	0	0	642	2	9.84	2.05	4.80	0.64	26.2	5.5	1.26	.347	3.57	2.61	66	9.25	23.3
25	Luis Castillo L. Castillo	84	2025	SEA	24	8	6	.571	24	3.19	120	0	0	0	138.1	127	49	54	15	37	6	0	0	573	2	7.81	2.41	3.24	0.98	20.9	6.5	1.19	.284	3.51	3.71	93	8.26	4.3