lowest era in the mlb for any team since 1908, season

Since 1908, the Chicago Cubs have the best ERA by a team in a season, with an ERA of 1.74 in 1909.

	TEAM	ERA	SEASON	G	W%	W	L	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Cubs	1.74	1909	155	.680	104	49	155	680	111	32	11	1409.1	1,094	272	389	6	364	38	5,494	30	4.34	2.32	1.87	0.04	12.4	6.6	1.03	.247	2.48	6.99
2	Athletics	1.79	1910	155	.680	102	48	155	789	123	24	5	1421.2	1,103	282	441	8	450	55	5,503	39	4.99	2.85	1.75	0.05	14.3	8.2	1.09	.261	2.79	6.98
3	Athletics	1.93	1909	153	.621	95	58	153	728	110	27	3	1378.0	1,069	296	416	9	386	65	5,385	31	4.75	2.52	1.89	0.06	13.5	7.2	1.06	.253	2.72	6.98
4	Naps	2.02	1908	157	.584	90	64	157	548	108	18	5	1424.1	1,172	319	459	16	328	34	5,488	24	3.46	2.07	1.67	0.10	10.0	6.0	1.05	.253	2.90	7.41
5	White Sox	2.03	1910	156	.444	68	85	156	785	103	23	7	1421.0	1,130	320	479	16	381	38	5,513	31	4.97	2.41	2.06	0.10	14.2	6.9	1.06	.259	3.03	7.16
6	White Sox	2.05	1909	159	.513	78	74	159	669	115	26	4	1430.1	1,182	326	464	8	340	52	5,560	29	4.21	2.14	1.97	0.05	12.0	6.1	1.06	.261	2.92	7.44
7	Pirates	2.07	1909	154	.724	110	42	154	490	93	21	11	1401.2	1,174	322	448	12	320	48	5,438	14	3.15	2.05	1.53	0.08	9.0	5.9	1.07	.254	2.88	7.54
8	Phillies	2.10	1908	155	.539	83	71	155	476	116	22	6	1393.0	1,167	325	445	8	379	43	5,400	26	3.08	2.45	1.26	0.05	8.8	7.0	1.11	.258	2.88	7.54
9	Robins	2.12	1916	156	.610	94	60	156	634	96	22	9	1427.1	1,201	336	470	24	372	38	5,725	34	4.00	2.35	1.70	0.15	11.1	6.5	1.10	.253	2.96	7.57
10	Pirates	2.12	1908	155	.636	98	56	155	468	100	24	9	1402.1	1,142	331	474	16	406	52	5,584	19	3.00	2.61	1.15	0.10	8.4	7.3	1.10	.243	3.04	7.33
11	Senators	2.14	1918	130	.563	72	56	130	505	75	19	8	1228.0	1,021	292	408	10	395	28	4,954	35	3.70	2.89	1.28	0.07	10.2	8.0	1.15	.252	2.99	7.48
12	Cubs	2.14	1908	158	.643	99	55	158	668	108	27	12	1433.2	1,137	341	461	20	437	39	5,611	34	4.19	2.74	1.53	0.13	11.9	7.8	1.10	.251	2.89	7.14
13	Giants	2.14	1908	157	.636	98	56	157	656	95	24	18	1411.0	1,210	336	455	26	288	35	5,544	18	4.18	1.84	2.28	0.17	11.8	5.2	1.06	.261	2.90	7.72
14	Browns	2.15	1908	155	.546	83	69	155	607	107	15	5	1397.0	1,151	333	478	7	387	63	5,446	22	3.91	2.49	1.57	0.05	11.1	7.1	1.10	.261	3.08	7.42
15	White Sox	2.16	1917	156	.649	100	54	156	517	78	21	21	1424.1	1,236	342	462	10	413	35	5,645	12	3.27	2.61	1.25	0.06	9.2	7.3	1.16	.263	2.92	7.81
16	Phillies	2.17	1915	153	.592	90	62	153	652	98	20	8	1374.1	1,161	332	463	26	342	31	5,478	20	4.27	2.24	1.91	0.17	11.9	6.2	1.09	.256	3.03	7.60
17	Cubs	2.18	1918	131	.651	84	45	131	472	92	21	8	1197.0	1,050	290	393	13	296	22	4,843	19	3.55	2.23	1.59	0.10	9.7	6.1	1.12	.257	2.95	7.89
18	Braves	2.19	1916	158	.586	89	63	158	644	97	21	11	1415.2	1,206	345	453	24	325	30	5,612	23	4.09	2.07	1.98	0.15	11.5	5.8	1.08	.258	2.88	7.67
19	Red Sox	2.20	1917	157	.592	90	62	157	509	115	14	7	1421.1	1,197	347	457	12	413	51	5,639	29	3.22	2.62	1.23	0.08	9.0	7.3	1.13	.255	2.89	7.58
20	Cubs	2.21	1919	140	.536	75	65	140	495	80	21	5	1265.0	1,127	311	407	14	294	28	5,109	20	3.52	2.09	1.68	0.10	9.7	5.8	1.12	.260	2.90	8.02
21	White Sox	2.22	1908	156	.579	88	64	156	623	107	21	10	1414.0	1,165	349	470	11	284	28	5,501	30	3.97	1.81	2.19	0.07	11.3	5.2	1.02	.253	2.99	7.42
22	Reds	2.23	1919	140	.686	96	44	140	407	89	23	9	1274.0	1,104	316	401	21	298	20	5,063	12	2.88	2.11	1.37	0.15	8.0	5.9	1.10	.251	2.83	7.80
23	Tigers	2.26	1909	158	.645	98	54	158	528	117	16	12	1420.1	1,254	357	493	16	359	54	5,688	37	3.35	2.27	1.47	0.10	9.3	6.3	1.14	.262	3.12	7.95
24	Giants	2.27	1917	158	.636	98	56	158	551	92	17	14	1426.2	1,221	360	457	29	327	27	5,721	24	3.48	2.06	1.69	0.18	9.6	5.7	1.09	.249	2.88	7.70
25	Giants	2.27	1909	158	.601	92	61	158	735	102	16	15	1440.2	1,248	364	547	28	397	31	5,680	42	4.59	2.48	1.85	0.17	12.9	7.0	1.14	.272	3.42	7.80