fewest runs per game allowed in a season by a team 1900s

Between the 1900 and 1909 seasons, the Chicago Cubs had the fewest runs allowed per game pitched by a team in a season, with 2.46 in 1906.

	TEAM	R/G	R	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Cubs	2.46	381	155	1906	.763	116	36	155	1.75	702	125	28	10	1388.1	1,018	270	12	446	53	5,427	20	4.55	2.89	1.57	0.08	12.9	8.2	1.05	.239	2.47	6.60
2	Cubs	2.51	389	155	1909	.680	104	49	155	1.74	680	111	32	11	1409.1	1,094	272	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
3	Cubs	2.52	390	155	1907	.704	107	45	155	1.73	586	114	31	8	1373.1	1,054	264	11	402	38	5,315	25	3.84	2.63	1.46	0.07	11.0	7.6	1.06	.244	2.56	6.91
4	Athletics	2.72	416	153	1909	.621	95	58	153	1.93	728	110	27	3	1378.0	1,069	296	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
5	White Sox	2.85	450	158	1905	.605	92	60	158	1.99	613	131	15	0	1427.0	1,163	315	11	329	31	5,542	39	3.87	2.07	1.86	0.07	11.1	5.9	1.05	.253	2.84	7.33
6	Cubs	2.85	442	155	1905	.601	92	61	155	2.04	627	133	23	2	1407.1	1,135	319	14	385	51	5,500	21	4.01	2.46	1.63	0.09	11.4	7.0	1.08	.253	2.83	7.26
7	Phillies	2.87	445	155	1908	.539	83	71	155	2.10	476	116	22	6	1393.0	1,167	325	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
8	Giants	2.9	455	157	1908	.636	98	56	157	2.14	656	95	24	18	1411.0	1,210	336	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
9	Pirates	2.91	448	154	1909	.724	110	42	154	2.07	490	93	21	11	1401.2	1,174	322	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
10	Cubs	2.92	461	158	1908	.643	99	55	158	2.14	668	108	27	12	1433.2	1,137	341	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
11	White Sox	2.92	464	159	1909	.513	78	74	159	2.05	669	115	26	4	1430.1	1,182	326	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
12	Naps	2.92	459	157	1908	.584	90	64	157	2.02	548	108	18	5	1424.1	1,172	319	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
13	Americans	2.97	466	157	1904	.617	95	59	157	2.12	612	148	21	1	1406.0	1,208	331	31	233	29	5,448	22	3.92	1.49	2.63	0.20	11.2	4.3	1.02	.259	2.98	7.73
14	White Sox	2.99	460	154	1906	.616	93	58	154	2.13	543	117	32	4	1375.1	1,212	326	11	255	32	5,345	33	3.55	1.67	2.13	0.07	10.2	4.8	1.07	.267	3.01	7.93
15	Giants	3.01	476	158	1904	.693	106	47	158	2.17	707	127	21	15	1396.2	1,151	337	36	349	35	5,561	29	4.56	2.25	2.03	0.23	12.7	6.3	1.07	.251	3.07	7.42
16	White Sox	3.01	470	156	1908	.579	88	64	156	2.22	623	107	21	10	1414.0	1,165	349	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
17	Pirates	3.01	464	154	1906	.608	93	60	154	2.21	532	116	26	2	1358.0	1,234	334	13	309	42	5,387	26	3.53	2.05	1.72	0.09	9.9	5.7	1.14	.272	3.08	8.18
18	White Sox	3.03	475	157	1907	.576	87	64	157	2.22	604	112	16	9	1406.1	1,279	347	13	305	22	5,555	31	3.87	1.95	1.98	0.08	10.9	5.5	1.13	.275	3.04	8.19
19	Pirates	3.06	474	155	1908	.636	98	56	155	2.12	468	100	24	9	1402.1	1,142	331	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
20	Naps	3.07	482	157	1906	.582	89	64	157	2.09	530	133	27	4	1412.2	1,197	328	16	365	48	5,560	23	3.38	2.33	1.45	0.10	9.5	6.6	1.11	.257	3.07	7.63
21	Browns	3.08	478	155	1908	.546	83	69	155	2.15	607	107	15	5	1397.0	1,151	333	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
22	White Sox	3.09	482	156	1904	.578	89	65	156	2.30	550	134	26	3	1380.0	1,161	353	13	303	46	5,415	37	3.59	1.98	1.82	0.08	10.2	5.6	1.06	.255	3.14	7.57
23	Pirates	3.1	440	142	1902	.741	103	36	142	2.30	564	131	21	3	1264.2	1,142	323	4	250	61	5,048	19	4.01	1.78	2.26	0.03	11.2	5.0	1.10	.273	3.13	8.13
24	Tigers	3.12	493	158	1909	.645	98	54	158	2.26	528	117	16	12	1420.1	1,254	357	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
25	Naps	3.13	482	154	1904	.570	86	65	154	2.22	627	141	20	0	1356.2	1,273	335	10	285	36	5,432	36	4.16	1.89	2.20	0.07	11.5	5.2	1.15	.282	3.20	8.44