team with best run differential in a single season from 1970 to 1990

Between the 1970 and 1990 seasons, the Cincinnati Reds had the highest run differential by a team in a season, with a differential of 254 runs in 1975.

	TEAM	DIFF	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Reds	254	1975	162	.667	108	54	5,581	840	1,515	278	37	124	779	691	35	916	168	36	6,418	2,239	439	66	45	67	122	.271	.353	.401	.754
2	Dodgers	237	1974	162	.630	102	60	5,557	798	1,511	231	34	139	744	597	28	820	149	75	6,332	2,227	404	86	64	95	117	.272	.342	.401	.743
3	Reds	224	1976	162	.630	102	60	5,702	857	1,599	271	63	141	802	681	28	902	210	57	6,538	2,419	475	67	60	63	103	.280	.357	.424	.781
4	Orioles	218	1970	162	.667	108	54	5,545	792	1,424	213	25	179	748	717	44	952	84	39	6,416	2,224	417	64	46	64	110	.257	.344	.401	.745
5	Phillies	213	1976	162	.623	101	61	5,528	770	1,505	259	45	110	708	542	40	793	127	70	6,236	2,184	414	59	67	55	119	.272	.338	.395	.733
6	Orioles	212	1971	158	.639	101	57	5,303	742	1,382	207	25	158	702	672	46	844	66	38	6,143	2,113	390	85	37	69	127	.261	.347	.398	.745
7	Mets	205	1986	162	.667	108	54	5,558	783	1,462	261	31	148	730	631	31	968	118	48	6,348	2,229	440	75	53	68	122	.263	.339	.401	.740
8	Orioles	193	1973	162	.599	97	65	5,537	754	1,474	229	48	119	692	648	43	752	146	64	6,335	2,156	396	58	49	49	126	.266	.345	.389	.734
9	Blue Jays	190	1987	162	.593	96	66	5,635	845	1,514	277	38	215	790	555	38	970	126	50	6,293	2,512	530	30	35	45	136	.269	.336	.446	.782
10	Pirates	189	1971	162	.599	97	65	5,674	788	1,555	223	61	154	744	469	29	919	65	31	6,283	2,362	438	62	49	73	120	.274	.330	.416	.746
11	Dodgers	187	1977	162	.605	98	64	5,589	769	1,484	223	28	191	729	588	23	896	114	62	6,327	2,336	442	83	44	67	103	.266	.336	.418	.753
12	Tigers	186	1984	162	.642	104	58	5,644	829	1,529	254	46	187	788	602	34	941	106	68	6,373	2,436	487	48	45	51	102	.271	.342	.432	.774
13	Athletics	180	1988	162	.642	104	58	5,602	800	1,474	251	22	156	752	580	65	926	129	54	6,356	2,237	429	54	55	29	142	.263	.336	.399	.736
14	Yankees	180	1977	162	.617	100	62	5,605	831	1,576	267	47	184	784	533	28	681	93	57	6,260	2,489	498	46	48	49	117	.281	.344	.444	.788
15	Yankees	179	1985	161	.602	97	64	5,458	839	1,458	272	31	176	793	620	50	771	155	53	6,236	2,320	479	48	60	50	119	.267	.344	.425	.769
16	Phillies	179	1977	162	.623	101	61	5,546	847	1,548	266	56	186	795	573	38	806	135	68	6,290	2,484	508	59	74	75	121	.279	.346	.448	.794
17	Pirates	179	1972	155	.619	96	59	5,490	691	1,505	251	47	110	654	404	25	871	49	30	6,021	2,180	408	52	50	69	110	.274	.324	.397	.721
18	Cardinals	175	1985	162	.623	101	61	5,467	747	1,446	245	59	87	687	586	18	853	314	96	6,182	2,070	391	70	41	61	91	.264	.335	.379	.714
19	Orioles	175	1979	159	.642	102	57	5,371	757	1,401	258	24	181	717	608	31	847	99	49	6,106	2,250	463	42	54	52	143	.261	.336	.419	.755
20	Brewers	174	1982	163	.586	95	67	5,733	891	1,599	277	41	216	843	484	18	714	84	52	6,337	2,606	534	56	46	42	106	.279	.335	.455	.789
21	Mets	171	1988	160	.625	100	60	5,408	703	1,387	251	24	152	659	544	32	842	140	51	6,105	2,142	427	65	56	79	94	.256	.325	.396	.721
22	Blue Jays	171	1985	161	.615	99	62	5,508	759	1,482	281	53	158	714	503	30	807	144	77	6,106	2,343	492	21	44	44	121	.269	.331	.425	.757
23	Royals	171	1977	162	.630	102	60	5,594	822	1,549	299	77	146	773	522	45	687	170	87	6,268	2,440	522	49	58	50	104	.277	.340	.436	.776
24	Orioles	165	1980	162	.617	100	62	5,585	805	1,523	258	29	156	751	587	21	766	111	38	6,281	2,307	443	42	46	38	158	.273	.342	.413	.755
25	Athletics	163	1990	162	.636	103	59	5,433	733	1,379	209	22	164	693	651	46	992	141	54	6,238	2,124	395	60	48	38	122	.254	.336	.391	.727