which mlb team had the best run differential in regular season and playoffs combined in one year since 1970

Since 1970, the New York Yankees have the highest run differential by a team in a combined regular-season and postseason, with a differential of 337 runs in 1998.

	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	Yankees	337	1998	175	.714	125	50	6,070	1,027	1,734	309	32	221	965	715	61	1,120	165	68	6,946	2,770	562	37	63	39	159	.286	.363	.456	.820
2	Dodgers	331	2022	166	.675	112	54	5,658	859	1,448	336	31	216	823	621	57	1,418	100	19	6,394	2,494	583	3	55	23	86	.256	.333	.441	.773
3	Mariners	287	2001	172	.698	120	52	6,009	965	1,712	322	40	178	917	650	64	1,072	180	45	6,845	2,648	540	51	71	57	119	.285	.357	.441	.798
4	Astros	279	2019	180	.650	117	63	6,229	991	1,682	348	28	313	957	711	68	1,320	78	28	7,078	3,025	689	11	59	21	157	.270	.348	.486	.834
5	Dodgers	278	2021	174	.644	112	62	5,846	878	1,428	264	24	251	847	651	107	1,508	81	17	6,686	2,493	539	35	47	41	103	.244	.329	.426	.755
6	Dodgers	274	2019	167	.647	108	59	5,666	908	1,452	311	20	288	882	627	82	1,420	62	10	6,476	2,667	619	55	46	50	101	.256	.337	.471	.807
7	Astros	270	2018	170	.629	107	63	5,726	839	1,461	294	18	219	804	604	69	1,264	74	29	6,459	2,448	531	15	45	23	160	.255	.331	.428	.759
8	Cubs	270	2016	179	.640	114	64	6,090	883	1,546	324	33	219	840	702	102	1,491	77	35	6,979	2,593	576	43	42	50	115	.254	.339	.426	.765
9	Reds	265	1975	172	.669	115	57	5,927	888	1,603	291	40	135	826	725	37	974	188	38	6,807	2,379	466	68	50	71	126	.270	.351	.401	.752
10	Red Sox	263	2007	176	.608	107	69	6,065	966	1,710	393	36	184	925	755	68	1,127	102	25	6,985	2,727	613	34	63	62	169	.282	.364	.450	.814
11	Red Sox	262	2018	176	.676	119	57	6,124	960	1,630	380	32	225	909	628	61	1,373	132	34	6,873	2,749	637	9	51	45	137	.266	.338	.449	.787
12	Indians	251	2017	167	.623	104	63	5,675	836	1,477	335	30	217	797	622	53	1,214	89	23	6,420	2,523	582	24	46	33	129	.260	.336	.445	.781
13	Indians	251	1995	159	.686	109	50	5,543	899	1,574	296	28	223	858	605	40	862	150	57	6,272	2,595	547	34	50	48	136	.284	.356	.468	.824
14	Braves	250	1998	171	.649	111	60	5,785	859	1,559	303	27	223	825	588	61	1,136	104	44	6,562	2,585	553	80	48	41	108	.269	.341	.447	.787
15	Astros	248	1998	166	.620	103	63	5,762	882	1,600	331	28	167	825	632	77	1,171	156	51	6,580	2,488	526	60	49	54	151	.278	.354	.432	.786
16	Orioles	248	1970	170	.676	115	55	5,825	852	1,510	227	25	195	804	749	45	1,004	85	41	6,734	2,372	447	67	48	68	117	.259	.346	.407	.753
17	Reds	246	1976	169	.645	109	60	5,935	898	1,666	286	69	148	840	708	28	934	222	62	6,804	2,534	503	68	65	68	109	.281	.357	.427	.784
18	Dodgers	242	1974	171	.620	106	65	5,853	829	1,584	243	36	146	773	643	29	868	157	76	6,680	2,337	425	90	65	103	123	.271	.342	.399	.742
19	Yankees	237	2022	171	.596	102	69	5,706	836	1,357	232	8	266	793	647	75	1,494	107	35	6,485	2,403	506	14	43	36	124	.238	.321	.421	.742
20	Astros	236	2022	175	.669	117	58	5,864	790	1,447	304	13	231	767	563	71	1,297	88	24	6,553	2,470	548	11	44	20	127	.247	.318	.421	.739
21	Athletics	233	2001	167	.623	104	63	5,747	896	1,512	347	23	203	846	651	91	1,052	71	29	6,575	2,514	573	25	61	58	134	.263	.344	.437	.782
22	Angels	227	2002	178	.618	110	68	6,243	952	1,784	363	35	176	906	501	80	887	128	53	6,950	2,745	574	57	69	50	118	.286	.343	.440	.783
23	Diamondbacks	226	1999	166	.608	101	65	5,784	924	1,592	296	47	220	881	602	51	1,067	137	40	6,559	2,642	563	61	61	53	98	.275	.345	.457	.802
24	Red Sox	225	2013	178	.607	108	70	6,171	925	1,684	392	32	188	886	640	80	1,473	135	21	6,972	2,704	612	26	55	59	147	.273	.346	.438	.784
25	Braves	225	1997	171	.620	106	65	5,814	831	1,559	277	39	183	791	628	54	1,229	110	61	6,640	2,463	499	88	56	45	148	.268	.342	.424	.766