highest single season run differential per game

The Chicago White Stockings have the highest run differential per game by a team in a season, with 5.56 in 1876.

	TEAM	DIFF/G	DIFF	G	SEASON	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	OBP	SLG	OPS
1	White Stockings	5.56	367	66	1876	.788	52	14	2,748	624	926	131	32	8	441	70		45			2,818	1,145	171			.337		.417
2	Maroons	4.02	458	114	1884	.832	94	19	4,285	887	1,251	259	41	32		181		542			4,466	1,688	332			.292		.394
3	White Stockings	3.22	364	113	1885	.777	87	25	4,093	834	1,079	184	75	54	606	340		429			4,433	1,575	313			.264		.385
4	Grays	3.02	257	85	1879	.702	59	25	3,392	612	1,003	142	55	12	405	91		172			3,483	1,291	209			.296		.381
5	White Stockings	2.99	251	84	1882	.655	55	29	3,225	604	892	209	54	15	451	142		262			3,367	1,254	278			.277		.389
6	Gothams	2.87	321	112	1885	.759	85	27	4,029	691	1,085	150	82	16	464	221		312			4,250	1,447	248			.269		.359
7	Metropolitans	2.78	311	112	1884	.701	75	32	4,012	734	1,052	155	64	22		203	35	315			4,250	1,401	241			.262	.304	.349	.653
8	Red Stockings	2.76	221	80	1882	.688	55	25	3,007	489	795	95	47	5		102		204			3,109	999	147			.264		.332
9	Orioles	2.75	363	132	1895	.669	87	43	4,725	1,009	1,530	235	89	25	828	355	106	243	310		5,311	2,018	349	125		.324	.384	.427	.811
10	White Stockings	2.74	345	126	1886	.726	90	34	4,378	900	1,223	198	87	53	673	460		513	213		4,838	1,754	338			.279		.401
11	Orioles	2.73	352	129	1894	.695	89	39	4,799	1,171	1,647	271	150	33	976	516	98	200	324		5,564	2,317	454	151		.343	.418	.483	.901
12	Yankees	2.7	411	152	1939	.702	106	45	5,300	967	1,521	259	55	166	904	701	36	543	72	37	6,129	2,388	480	92	99	.287	.374	.451	.825
13	Browns	2.68	370	138	1887	.704	95	40	5,048	1,131	1,550	261	78	39	862	442	67	342	581		5,557	2,084	378			.307	.371	.413	.783
14	Beaneaters	2.67	360	135	1897	.705	93	39	4,937	1,025	1,574	230	83	45	885	423	47	263	233		5,521	2,105	358	114		.319	.378	.426	.804
15	White Stockings	2.57	221	86	1880	.798	67	17	3,135	538	876	164	39	4	378	104		217			3,239	1,130	207			.279		.360
16	Red Caps	2.56	156	61	1877	.700	42	18	2,368	419	700	91	37	4	291	65		121			2,433	877	132			.296		.370
17	Red Caps	2.55	214	84	1879	.643	54	30	3,217	562	883	138	51	20	393	90		222			3,307	1,183	209			.274		.368
18	Red Stockings	2.54	249	98	1883	.622	61	37	3,669	662	961	122	74	34		139		261			3,808	1,333	230			.262		.363
19	Reds	2.54	353	139	1891	.689	93	42	4,889	1,028	1,341	163	100	52	776	651	66	499	447		5,606	1,860	315			.274	.367	.380	.748
20	Browns	2.53	352	139	1886	.669	93	46	5,009	944	1,365	206	85	20	655	400	52	425	336		5,461	1,801	311			.273	.333	.360	.692
21	Orioles	2.52	333	132	1896	.698	90	39	4,719	995	1,548	207	100	23	854	386	120	201	441		5,323	2,024	330	98		.328	.393	.429	.822
22	Brown Stockings	2.45	157	64	1876	.703	45	19	2,478	386	642	73	27	2	264	59		63			2,537	775	102			.259		.313
23	Dark Blues	2.43	168	69	1876	.691	47	21	2,664	429	711	96	22	2	265	39		78			2,703	857	120			.267		.322
24	Grays	2.43	277	114	1884	.750	84	28	4,093	665	987	153	43	21	404	300		469			4,393	1,289	217			.241		.315
25	Yankees	2.39	371	155	1927	.714	110	44	5,354	976	1,644	291	103	158	907	642	22	610	90	64	6,222	2,615	552	204		.307	.384	.488	.872