The New York Yankees have an ERA of 3.66 all-time.

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Highlanders	3.08	1903	136	.537	72	62	136	463	111	7	2	1201.1	1,171	411	573	19	245	41		4,882	22	3.47	1.84	1.89	0.14	9.5	5.0	1.18	.280	4.29	8.77
2	Highlanders	2.57	1904	155	.609	92	59	155	684	123	14	1	1380.2	1,180	394	526	29	311	41		5,440	41	4.46	2.03	2.20	0.19	12.6	5.7	1.08	.263	3.43	7.69
3	Highlanders	2.93	1905	152	.477	71	78	152	642	88	16	4	1353.2	1,235	440	622	26	396	43		5,487	46	4.27	2.63	1.62	0.17	11.7	7.2	1.20	.276	4.14	8.21
4	Highlanders	2.78	1906	155	.596	90	61	155	605	99	18	5	1357.2	1,236	419	544	21	351	45		5,429	36	4.01	2.33	1.72	0.14	11.1	6.5	1.17	.276	3.61	8.19
5	Highlanders	3.03	1907	152	.473	70	78	152	511	93	7	6	1333.2	1,327	449	671	13	428	48		5,547	28	3.45	2.89	1.19	0.09	9.2	7.7	1.32	.289	4.53	8.96
6	Highlanders	3.16	1908	155	.331	51	103	155	585	90	11	3	1366.0	1,293	479	712	26	458	72		5,653	35	3.85	3.02	1.28	0.17	10.3	8.1	1.28	.281	4.69	8.52
7	Highlanders	2.65	1909	153	.490	74	77	153	597	94	17	8	1350.1	1,223	397	588	21	422	69		5,424	37	3.98	2.81	1.41	0.14	11.0	7.8	1.22	.279	3.92	8.15
8	Highlanders	2.61	1910	156	.583	88	63	156	654	110	14	8	1399.0	1,238	406	556	16	364	54		5,518	27	4.21	2.34	1.80	0.10	11.9	6.6	1.15	.276	3.58	7.96
9	Highlanders	3.54	1911	153	.500	76	76	153	667	90	5	3	1360.2	1,404	535	724	26	406	53		5,665	29	4.41	2.69	1.64	0.17	11.8	7.2	1.33	.305	4.79	9.29
10	Highlanders	4.13	1912	153	.329	50	102	153	637	105	4	3	1335.0	1,448	612	842	28	436	45		5,610	37	4.29	2.94	1.46	0.19	11.4	7.8	1.41	.318	5.68	9.76
11	Yankees	3.27	1913	153	.377	57	94	153	530	75	7	7	1344.0	1,318	489	669	31	455	54		5,532	25	3.55	3.05	1.16	0.21	9.6	8.2	1.32	.288	4.48	8.83
12	Yankees	2.81	1914	157	.455	70	84	157	563	98	9	2	1397.1	1,277	437	550	30	390	32		5,524	37	3.63	2.51	1.44	0.19	10.2	7.1	1.19	.277	3.54	8.22
13	Yankees	3.06	1915	154	.454	69	83	154	559	101	12	1	1382.2	1,272	470	588	41	517	48		5,579	20	3.64	3.37	1.08	0.27	10.0	9.3	1.29	.279	3.83	8.28
14	Yankees	2.77	1916	156	.519	80	74	156	616	84	11	17	1428.0	1,249	440	561	37	476	47		5,640	22	3.88	3.00	1.29	0.23	10.9	8.4	1.21	.272	3.54	7.87
15	Yankees	2.66	1917	155	.464	71	82	155	571	87	9	6	1411.1	1,280	417	558	28	427	36		5,551	20	3.64	2.72	1.34	0.18	10.3	7.7	1.21	.279	3.56	8.16
16	Yankees	3.00	1918	126	.488	60	63	126	370	59	8	13	1157.1	1,103	386	474	25	463	39		4,821	14	2.88	3.60	0.80	0.19	7.7	9.6	1.35	.275	3.69	8.58
17	Yankees	2.82	1919	141	.576	80	59	141	500	85	14	7	1287.0	1,143	403	506	47	433	37		5,225	19	3.50	3.03	1.15	0.33	9.6	8.3	1.22	.260	3.54	7.99
18	Yankees	3.32	1920	154	.617	95	59	154	480	88	15	13	1368.0	1,414	504	632	48	420	32		5,696	24	3.16	2.76	1.14	0.32	8.4	7.4	1.34	.290	4.16	9.30
19	Yankees	3.82	1921	153	.641	98	55	153	481	92	8	15	1364.0	1,461	579	706	51	470	51		5,940	23	3.17	3.10	1.02	0.34	8.1	7.9	1.42	.289	4.66	9.64
20	Yankees	3.39	1922	154	.610	94	60	154	458	100	7	13	1393.2	1,402	525	618	73	423	21		5,833	20	2.96	2.73	1.08	0.47	7.9	7.3	1.31	.274	3.99	9.05
21	Yankees	3.62	1923	152	.645	98	54	152	506	101	9	10	1380.2	1,365	556	622	68	491	27		5,856	32	3.30	3.20	1.03	0.44	8.6	8.4	1.34	.272	4.05	8.90
22	Yankees	3.86	1924	153	.586	89	63	153	487	76	13	13	1359.1	1,483	583	667	59	522	26		5,923	35	3.22	3.46	0.93	0.39	8.2	8.8	1.47	.295	4.42	9.82
23	Yankees	4.33	1925	156	.448	69	85	156	492	80	8	13	1387.2	1,560	668	774	78	505	31		6,078	20	3.19	3.28	0.97	0.51	8.1	8.3	1.49	.298	5.02	10.12
24	Yankees	3.86	1926	155	.591	91	63	155	486	63	4	22	1372.1	1,442	588	714	56	478	26		5,971	21	3.19	3.13	1.02	0.37	8.1	8.0	1.40	.281	4.68	9.46
25	Yankees	3.20	1927	155	.714	110	44	155	431	82	11	22	1389.2	1,403	494	605	42	409	18		5,849	16	2.79	2.65	1.05	0.27	7.4	7.0	1.30	.275	3.92	9.09
	Total	3.66		19,137	.569	10,844	8,205	19,137	101,000	5,871	998	3,657	171070.0	164,614	69,520	79,856	13,391	60,899	4,415	2,269	722,998	4,560	5.31	3.20	1.66	0.70	14.0	8.4	1.32	.278	4.20	8.66