The Pittsburgh Pirates have 4.45 runs per game all-time.

Interpreted as:

pirates average runs per game in first inning

	TEAM	R/G	R	G	SEASON	W%	W	L	AB	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Alleghenys	5.39	426	79	1882	.500	39	39	2,889	725	106	59	18		92		183			2,981	1,003	183					.251		.347
2	Alleghenys	5.36	525	98	1883	.316	31	67	3,607	892	120	58	13		164		345			3,771	1,167	191					.247		.324
3	Alleghenys	3.69	406	110	1884	.278	30	78	3,689	777	105	50	2		143	41	411			3,873	988	157					.211	.248	.268	.516
4	Alleghenys	4.93	547	111	1885	.505	56	55	3,975	955	123	79	5	371	189	44	537			4,208	1,251	207					.240	.282	.315	.597
5	Alleghenys	5.79	810	140	1886	.584	80	57	4,854	1,171	186	96	16	563	478	38	713	260		5,370	1,597	298					.241	.314	.329	.643
6	Alleghenys	4.97	621	125	1887	.444	55	69	4,414	1,141	183	78	20	479	319	38	381	221		4,771	1,540	281					.258	.314	.349	.663
7	Alleghenys	3.84	534	139	1888	.493	66	68	4,713	1,070	150	49	14	390	194	46	583	287		4,953	1,360	213					.227	.264	.289	.553
8	Alleghenys	5.42	726	134	1889	.462	61	71	4,748	1,202	209	65	42	597	420	44	467	231		5,212	1,667	316					.253	.320	.351	.671
9	Alleghenys	4.33	597	138	1890	.169	23	113	4,739	1,088	160	43	20	426	408	66	460	208		5,213	1,394	223					.230	.300	.294	.594
10	Pirates	4.96	679	137	1891	.407	55	80	4,794	1,148	148	71	29	524	427	50	503	205		5,271	1,525	248					.239	.308	.318	.626
11	Pirates	5.17	802	155	1892	.523	80	73	5,469	1,288	143	108	38	600	435	44	453	222		5,948	1,761	289					.236	.297	.322	.619
12	Pirates	7.4	970	131	1893	.628	81	48	4,834	1,447	176	127	37	816	537	62	274	210		5,433	1,988	340					.299	.377	.411	.788
13	Pirates	7.26	965	133	1894	.500	65	65	4,700	1,465	223	125	48	812	444	68	210	257		5,375	2,082	396	163				.312	.379	.443	.822
14	Pirates	6.04	815	135	1895	.538	71	61	4,677	1,355	192	89	27	677	378	65	299	257		5,226	1,806	308	106				.290	.351	.386	.737
15	Pirates	6.01	787	131	1896	.512	66	63	4,701	1,371	169	94	27	667	387	58	286	217		5,254	1,809	290	108				.292	.353	.385	.738
16	Pirates	5.01	676	135	1897	.458	60	71	4,590	1,266	140	108	25	575	359	67	333	170		5,114	1,697	273	98				.276	.337	.370	.707
17	Pirates	4.17	634	152	1898	.486	72	76	5,087	1,313	140	88	14	520	336	74	339	107		5,638	1,671	242	141				.258	.313	.328	.642
18	Pirates	5.43	841	155	1899	.510	76	73	5,486	1,582	196	121	29	706	386	63	344	179		6,079	2,107	346	144				.288	.342	.384	.726
19	Pirates	5.24	733	140	1900	.568	79	60	4,817	1,312	185	100	26	602	327	63	319	174		5,317	1,775	311	110				.272	.327	.368	.695
20	Pirates	5.55	777	140	1901	.647	90	49	4,913	1,407	182	92	29	636	386	52	497	203		5,468	1,860	303	117				.286	.345	.379	.723
21	Pirates	5.45	774	142	1902	.741	103	36	4,926	1,410	189	95	18	660	372	64	440	222		5,480	1,843	302	118				.286	.344	.374	.718
22	Pirates	5.62	793	141	1903	.650	91	49	4,988	1,429	208	110	34	650	364	50	400	172		5,511	1,959	352	109				.286	.341	.393	.734
23	Pirates	4.33	675	156	1904	.569	87	66	5,160	1,333	164	102	15	523	391	47	516	178		5,714	1,746	281	116				.258	.316	.338	.655
24	Pirates	4.46	692	155	1905	.627	96	57	5,213	1,385	190	91	22	564	382	36	512	202		5,790	1,823	303	159				.266	.320	.350	.670
25	Pirates	4.04	622	154	1906	.608	93	60	5,030	1,313	164	67	12	497	424	42	385	162		5,686	1,647	243	190				.261	.324	.327	.651
	Total	4.45	97,130	21,833		.500	10,851	10,842	747,875	196,862	32,338	8,933	12,244	86,640	64,280	5,526	99,481	15,672	3,266	833,475	283,798	53,515	12,557	3,114	3,696	10,045	.263	.325	.379	.704