what team has the lowest starting pitcher earned run average

The New York Mets have the lowest ERA by a team this season, with an ERA of 3.15.

Interpreted as:

What team has the lowest starting pitcher earned run average this regular season?

	TEAM	ERA	SEASON	G	W%	W	L	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	Mets	3.15	2025	78	.590	46	32	78	392	1	1	0	408.1	352	143	162	35	172	17	0	1	1,728	17	8.64	3.79	2.28	0.77	22.7	10.0	1.28	.285	3.57	7.76
2	Rangers	3.21	2025	78	.487	38	40	78	364	2	1	0	412.1	337	147	150	43	124	11	0	0	1,669	17	7.95	2.71	2.94	0.94	21.8	7.4	1.12	.261	3.27	7.36
3	Royals	3.34	2025	78	.487	38	40	78	406	0	0	0	437.0	378	162	169	48	136	12	0	2	1,797	17	8.36	2.80	2.99	0.99	22.6	7.6	1.18	.276	3.48	7.78
4	Tigers	3.34	2025	79	.620	49	30	79	403	1	1	0	393.0	339	146	155	47	126	16	0	1	1,623	6	9.23	2.89	3.20	1.08	24.8	7.8	1.18	.283	3.55	7.76
5	Brewers	3.44	2025	78	.551	43	35	78	348	0	0	0	382.1	341	146	157	50	150	16	0	2	1,619	5	8.19	3.53	2.32	1.18	21.5	9.3	1.28	.276	3.70	8.03
6	Phillies	3.45	2025	78	.603	47	31	78	468	0	0	0	440.2	404	169	181	48	130	15	0	0	1,829	10	9.56	2.66	3.60	0.98	25.6	7.1	1.21	.305	3.70	8.25
7	Yankees	3.49	2025	77	.584	45	32	77	432	0	0	0	418.0	330	162	172	47	137	13	0	0	1,708	10	9.30	2.95	3.15	1.01	25.3	8.0	1.12	.262	3.70	7.11
8	Braves	3.64	2025	76	.461	35	41	76	448	1	0	0	430.1	383	174	185	56	140	20	0	1	1,791	11	9.37	2.93	3.20	1.17	25.0	7.8	1.22	.290	3.87	8.01
9	Astros	3.67	2025	78	.577	45	33	78	458	3	0	0	426.1	362	174	184	55	136	19	0	2	1,760	7	9.67	2.87	3.37	1.16	26.0	7.7	1.17	.281	3.88	7.64
10	Pirates	3.70	2025	79	.392	31	48	79	350	1	0	0	435.1	385	179	192	43	133	13	0	0	1,796	12	7.24	2.75	2.63	0.89	19.5	7.4	1.19	.272	3.97	7.96
11	Giants	3.70	2025	78	.564	44	34	78	429	0	0	0	423.0	404	174	195	40	144	8	0	1	1,791	17	9.13	3.06	2.98	0.85	24.0	8.0	1.30	.311	4.15	8.60
12	Reds	3.72	2025	78	.513	40	38	78	374	2	1	0	416.1	370	172	184	57	122	22	0	0	1,720	12	8.08	2.64	3.07	1.23	21.7	7.1	1.18	.273	3.98	8.00
13	Rays	3.77	2025	78	.551	43	35	78	381	1	0	0	439.1	381	184	195	70	127	22	0	1	1,785	7	7.81	2.60	3.00	1.43	21.3	7.1	1.16	.262	3.99	7.81
14	Padres	3.82	2025	77	.545	42	35	77	381	2	2	0	408.0	353	173	183	53	145	18	0	1	1,705	7	8.40	3.20	2.63	1.17	22.3	8.5	1.22	.271	4.04	7.79
15	Cardinals	3.96	2025	78	.538	42	36	78	341	1	1	0	427.2	417	188	199	42	111	10	0	0	1,788	10	7.18	2.34	3.07	0.88	19.1	6.2	1.23	.292	4.19	8.78
16	Guardians	3.96	2025	76	.513	39	37	76	364	1	0	0	400.0	373	176	187	55	172	11	0	2	1,710	8	8.19	3.87	2.12	1.24	21.3	10.1	1.36	.287	4.21	8.39
17	Twins	4.06	2025	77	.481	37	40	77	371	1	0	0	397.0	370	179	192	52	116	20	0	0	1,670	7	8.41	2.63	3.20	1.18	22.2	6.9	1.22	.286	4.35	8.39
18	Cubs	4.06	2025	77	.597	46	31	77	356	0	0	0	408.0	399	184	197	65	106	13	0	0	1,700	4	7.85	2.34	3.36	1.43	20.9	6.2	1.24	.288	4.35	8.80
19	White Sox	4.17	2025	78	.321	25	53	78	288	0	0	0	371.1	374	172	192	49	146	25	0	0	1,624	11	6.98	3.54	1.97	1.19	17.7	9.0	1.40	.291	4.65	9.06
20	Angels	4.17	2025	77	.481	37	40	77	345	0	0	0	422.2	424	196	212	58	176	15	0	11	1,825	14	7.35	3.75	1.96	1.24	18.9	9.6	1.42	.297	4.51	9.03
21	Mariners	4.18	2025	76	.513	39	37	76	368	0	0	0	408.2	389	190	198	62	124	13	0	0	1,711	12	8.10	2.73	2.97	1.37	21.5	7.2	1.26	.286	4.36	8.57
22	Dodgers	4.25	2025	79	.608	48	31	79	347	0	0	0	364.0	321	172	189	57	161	19	0	3	1,560	19	8.58	3.98	2.16	1.41	22.2	10.3	1.32	.270	4.67	7.94
23	Red Sox	4.30	2025	79	.506	40	39	79	387	0	0	0	416.2	422	199	221	57	143	19	0	0	1,785	6	8.36	3.09	2.71	1.23	21.7	8.0	1.36	.310	4.77	9.12
24	Nationals	4.41	2025	78	.410	32	46	78	385	0	0	0	422.1	410	207	214	56	125	21	0	0	1,787	9	8.20	2.66	3.08	1.19	21.5	7.0	1.27	.295	4.56	8.74
25	Diamondbacks	4.53	2025	77	.506	39	38	77	389	0	0	0	419.2	398	211	232	64	146	17	0	4	1,790	6	8.34	3.13	2.66	1.37	21.7	8.2	1.30	.284	4.98	8.54