Kodai Senga has the lowest ERA by an active pitcher this season, with an ERA of 1.47.

Interpreted as:

best era with a minimum of 0.5 IP per team game for an active pitcher this regular season

	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	ERA-	FIP	FIP-	H/9	PRAA
1	Kodai Senga K. Senga	1.47	2025	NYM	13	7	3	.700	13	70	0	0	0	73.2	51	12	15	4	31	1	0	0	293	4	8.55	3.79	2.26	0.49	23.9	10.6	1.11	.251	1.83	37	3.19	79	6.23	6.8
2	Adrian Houser A. Houser	1.56	2025	CWS	9	5	2	.714	9	39	0	0	0	57.2	47	10	12	2	18	0	0	0	226	3	6.09	2.81	2.17	0.31	17.3	8.0	1.13	.269	1.87	38	3.11	74	7.34	7
3	Nathan Eovaldi N. Eovaldi	1.62	2025	TEX	15	6	3	.667	15	86	1	1	0	83.1	58	15	18	4	13	5	0	1	321	4	9.29	1.40	6.62	0.43	26.8	4.0	0.85	.254	1.94	40	2.28	55	6.26	17.3
4	Paul Skenes P. Skenes	1.94	2025	PIT	19	4	7	.364	19	125	1	0	0	116.0	77	25	28	5	30	4	0	0	449	2	9.70	2.33	4.17	0.39	27.8	6.7	0.92	.253	2.17	46	2.36	58	5.97	21.8
5	Ranger Suárez R. Suárez	1.99	2025	PHI	12	7	2	.778	12	73	0	0	0	77.0	60	17	18	6	19	1	0	0	304	0	8.53	2.22	3.84	0.70	24.0	6.3	1.03	.263	2.10	48	2.97	72	7.01	9.8
6	Tarik Skubal T. Skubal	2.02	2025	DET	18	10	2	.833	18	148	1	1	0	116.0	80	26	26	8	14	3	0	0	437	1	11.48	1.09	10.57	0.62	33.9	3.2	0.81	.273	2.02	51	1.86	46	6.21	28.5
7	Andrew Abbott A. Abbott	2.07	2025	CIN	16	8	1	.889	16	83	1	1	0	91.1	75	21	26	10	24	1	0	0	369	3	8.18	2.36	3.46	0.99	22.5	6.5	1.08	.259	2.56	47	3.50	82	7.39	7.8
8	Zack Wheeler Z. Wheeler	2.17	2025	PHI	18	9	3	.750	18	148	1	0	0	116.0	73	28	30	11	25	3	0	0	441	1	11.48	1.94	5.92	0.85	33.6	5.7	0.84	.244	2.33	53	2.48	60	5.66	20.9
9	Hunter Brown H. Brown	2.21	2025	HOU	18	9	3	.750	18	129	1	0	0	110.0	71	27	28	11	32	3	0	1	419	0	10.55	2.62	4.03	0.90	30.8	7.6	0.94	.246	2.29	55	2.99	74	5.81	13.2
10	Max Fried M. Fried	2.27	2025	NYY	19	11	2	.846	19	111	0	0	0	119.0	90	30	36	9	24	7	0	0	471	5	8.39	1.82	4.63	0.68	23.6	5.1	0.96	.253	2.72	56	2.98	71	6.81	16.1
11	Jacob deGrom J. deGrom	2.29	2025	TEX	18	9	2	.818	18	105	0	0	0	106.1	74	27	27	11	23	2	0	0	408	1	8.89	1.95	4.57	0.93	25.7	5.6	0.91	.236	2.29	57	3.15	75	6.26	12
12	Tyler Mahle T. Mahle	2.34	2025	TEX	14	6	3	.667	14	56	0	0	0	77.0	60	20	20	4	27	0	0	0	308	0	6.55	3.16	2.07	0.47	18.2	8.8	1.13	.253	2.34	58	3.35	80	7.01	7
13	Garrett Crochet G. Crochet	2.39	2025	BOS	19	9	4	.692	19	151	0	0	0	120.1	97	32	35	10	34	0	0	0	483	4	11.29	2.54	4.44	0.75	31.3	7.0	1.09	.302	2.62	56	2.50	60	7.25	21.8
14	Kris Bubic K. Bubic	2.48	2025	KCR	18	7	6	.538	18	113	0	0	0	108.2	92	30	34	6	34	3	0	1	442	1	9.36	2.82	3.32	0.50	25.6	7.7	1.16	.301	2.82	59	2.74	67	7.62	16.4
15	Matthew Boyd M. Boyd	2.52	2025	CHC	18	9	3	.750	18	96	0	0	0	103.2	88	29	34	10	23	5	0	0	413	1	8.33	2.00	4.17	0.87	23.2	5.6	1.07	.280	2.95	63	3.29	83	7.64	7.9
16	Chris Sale C. Sale	2.52	2025	ATL	15	5	4	.556	15	114	0	0	0	89.1	78	25	27	7	26	7	0	0	370	2	11.49	2.62	4.38	0.71	30.8	7.0	1.16	.329	2.72	60	2.65	67	7.86	13.3
17	Noah Cameron N. Cameron	2.56	2025	KCR	11	3	4	.429	11	50	0	0	0	63.1	41	18	18	7	20	0	0	0	248	2	7.11	2.84	2.50	0.99	20.2	8.1	0.96	.199	2.56	61	3.88	95	5.83	1.5
18	Michael King M. King	2.59	2025	SDP	10	4	2	.667	10	64	1	1	0	55.2	40	16	19	6	17	2	0	0	225	2	10.35	2.75	3.76	0.97	28.4	7.6	1.02	.250	3.07	65	3.20	80	6.47	5
19	Cristopher Sánchez C. Sánchez	2.59	2025	PHI	18	7	2	.778	18	116	0	0	0	107.2	93	31	32	7	29	6	0	0	441	5	9.70	2.42	4.00	0.59	26.3	6.6	1.13	.304	2.67	63	2.74	66	7.77	16.4
20	Mike Vasil M. Vasil	2.59	2025	CWS	24	3	3	.500	3	42	0	0	2	59.0	44	17	19	5	30	7	9	3	251	1	6.41	4.58	1.40	0.76	16.7	12.0	1.25	.234	2.90	64	4.64	110	6.71	-2.6
21	Logan Webb L. Webb	2.62	2025	SFG	19	8	6	.571	19	133	0	0	0	120.1	113	35	39	7	27	1	0	0	489	2	9.95	2.02	4.93	0.52	27.2	5.5	1.16	.330	2.92	65	2.32	60	8.45	21.6
22	Casey Mize C. Mize	2.63	2025	DET	15	9	2	.818	15	73	0	0	0	85.2	80	25	27	11	21	0	0	1	353	1	7.67	2.21	3.48	1.16	20.7	5.9	1.18	.278	2.84	66	3.78	93	8.40	2.6
23	Robbie Ray R. Ray	2.63	2025	SFG	19	9	3	.750	19	122	1	0	0	113.0	82	33	36	12	42	1	0	0	455	4	9.72	3.35	2.90	0.96	26.8	9.2	1.10	.252	2.87	66	3.44	88	6.53	5.7
24	Corbin Burnes C. Burnes	2.66	2025	AZ	11	3	2	.600	11	63	0	0	0	64.1	49	19	23	7	26	3	0	1	265	1	8.81	3.64	2.42	0.98	23.8	9.8	1.17	.253	3.22	64	3.89	99	6.85	0.2
25	Seth Lugo S. Lugo	2.67	2025	KCR	17	6	5	.545	17	88	0	0	0	101.0	78	30	32	15	31	3	0	1	401	3	7.84	2.76	2.84	1.34	21.9	7.7	1.08	.239	2.85	63	4.27	104	6.95	-2