fewest runs per game allowed for any pirates season

The Pittsburgh Pirates had their fewest runs allowed per game pitched in a season in 1909, with 2.91.

	TEAM	R/G	R	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	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
2	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
3	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
4	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
5	Pirates	3.23	507	157	1907	.591	91	63	157	2.30	497	111	24	5	1363.0	1,207	348	12	368	46		5,421	20	3.28	2.43	1.35	0.08	9.2	6.8	1.16	.266	3.35	7.97
6	Pirates	3.26	532	163	1968	.494	80	82	163	2.74	897	42	17	30	1487.1	1,322	453	73	485	36	61	6,140	51	5.43	2.93	1.85	0.44	14.6	7.9	1.21	.269	3.22	8.00
7	Pirates	3.27	412	126	1918	.520	65	60	126	2.48	367	85	8	7	1140.1	1,005	314	13	299	32		4,608	12	2.90	2.36	1.23	0.10	8.0	6.5	1.14	.255	3.25	7.93
8	Pirates	3.3	512	155	1972	.619	96	59	155	2.81	838	39	9	48	1414.1	1,282	441	90	433	29	60	5,845	34	5.33	2.76	1.94	0.57	14.3	7.4	1.21	.268	3.26	8.16
9	Pirates	3.33	520	156	1915	.474	73	81	156	2.60	544	91	18	11	1380.0	1,229	398	21	384	38		5,594	15	3.55	2.50	1.42	0.14	9.7	6.9	1.17	.262	3.39	8.02
10	Pirates	3.35	466	139	1919	.511	71	68	139	2.88	391	91	15	4	1249.0	1,113	400	23	263	36		5,030	18	2.82	1.90	1.49	0.17	7.8	5.2	1.10	.252	3.36	8.02
11	Pirates	3.42	541	158	1914	.448	69	85	158	2.70	488	86	10	11	1405.0	1,272	422	27	392	36		5,713	17	3.13	2.51	1.24	0.17	8.5	6.9	1.18	.261	3.47	8.15
12	Pirates	3.5	567	162	1984	.463	75	87	162	3.11	995	27	8	34	1470.0	1,344	508	102	502	11	48	6,095	43	6.09	3.07	1.98	0.62	16.3	8.2	1.26	.277	3.47	8.23
13	Pirates	3.51	565	161	1975	.571	92	69	161	3.01	768	43	11	31	1437.1	1,302	480	79	551	20	102	6,072	37	4.81	3.45	1.39	0.49	12.6	9.1	1.29	.263	3.54	8.15
14	Pirates	3.56	580	163	1965	.556	90	72	163	3.01	882	49	16	27	1479.0	1,324	495	89	469	44	56	6,115	53	5.37	2.85	1.88	0.54	14.4	7.7	1.21	.267	3.53	8.06
15	Pirates	3.56	552	155	1920	.513	79	75	155	2.89	444	92	17	10	1415.1	1,389	454	25	280	27		5,797	27	2.82	1.78	1.59	0.16	7.7	4.8	1.18	.272	3.51	8.83
16	Pirates	3.56	577	162	2013	.580	94	68	162	3.26	1,261	3	0	55	1470.2	1,299	533	101	515	70	26	6,147	81	7.72	3.15	2.45	0.62	20.5	8.4	1.23	.285	3.53	7.95
17	Pirates	3.6	558	155	1911	.552	85	69	155	2.84	605	91	13	11	1380.1	1,249	435	36	375	39		5,442	28	3.94	2.45	1.61	0.23	11.1	6.9	1.18	.276	3.64	8.14
18	Pirates	3.67	595	162	1992	.593	96	66	162	3.35	844	20	9	43	1479.2	1,410	551	101	455	30	61	6,162	52	5.13	2.77	1.85	0.61	13.7	7.4	1.26	.277	3.62	8.58
19	Pirates	3.67	595	162	1963	.457	74	88	162	3.10	900	34	12	33	1448.0	1,350	498	99	457	49	94	6,059	42	5.59	2.84	1.97	0.62	14.9	7.5	1.25	.275	3.70	8.39
20	Pirates	3.68	570	155	1905	.627	96	57	155	2.86	512	113	12	6	1382.2	1,270	440	12	389	59		5,577	36	3.33	2.53	1.32	0.08	9.2	7.0	1.20	.273	3.71	8.27
21	Pirates	3.68	596	162	2015	.605	98	64	162	3.21	1,338	0	0	54	1489.2	1,392	532	110	453	75	38	6,215	67	8.08	2.74	2.95	0.66	21.5	7.3	1.24	.302	3.60	8.41
22	Pirates	3.7	599	162	1971	.599	97	65	162	3.31	813	43	14	48	1461.0	1,426	537	108	470	31	78	6,165	37	5.01	2.90	1.73	0.67	13.2	7.6	1.30	.278	3.69	8.78
23	Pirates	3.72	565	152	1912	.616	93	58	152	2.85	664	94	18	7	1385.0	1,268	439	28	497	45		5,739	17	4.31	3.23	1.34	0.18	11.6	8.7	1.27	.275	3.67	8.24
24	Pirates	3.73	586	157	1916	.422	65	89	157	2.76	596	88	10	7	1419.2	1,277	436	24	443	36		5,846	21	3.78	2.81	1.35	0.15	10.2	7.6	1.21	.264	3.71	8.10
25	Pirates	3.74	576	154	1910	.562	86	67	154	2.83	479	73	13	12	1376.0	1,254	433	20	392	57		5,475	15	3.13	2.56	1.22	0.13	8.7	7.2	1.20	.273	3.77	8.20