best run differencial per game in a season 1920 to 2020

Between the 1920 and 2020 seasons, the New York Yankees had the highest run differential per game by a team in a season, with 2.7 in 1939.

	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	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	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
2	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
3	Dodgers	2.27	136	60	2020	.717	43	17	2,042	349	523	97	6	118	327	228	30	471	29	8	2,315	986	221	3	12	7	46	.256	.338	.483	.821
4	Yankees	2.15	334	155	1936	.667	102	51	5,591	1,065	1,676	315	83	182	997	700	33	593	77	40	6,391	2,703	580	67				.300	.381	.483	.864
5	Yankees	1.98	307	155	1931	.614	94	59	5,608	1,067	1,667	276	78	155	990	750	28	554	139	68	6,473	2,564	509	87				.297	.383	.457	.840
6	Yankees	1.96	308	157	1937	.662	102	52	5,487	979	1,554	282	73	174	921	712	34	607	60	36	6,294	2,504	529	61				.283	.369	.456	.825
7	Yankees	1.91	294	154	1942	.669	103	51	5,305	801	1,429	223	57	108	744	591	29	556	69	33	6,009	2,090	388	84			103	.269	.346	.394	.740
8	Yankees	1.91	309	162	1998	.704	114	48	5,643	965	1,625	290	31	207	907	653	57	1,025	153	63	6,444	2,598	528	32	59	34	145	.288	.364	.460	.825
9	Athletics	1.89	285	151	1929	.693	104	46	5,204	901	1,537	288	75	122	845	540	29	440	63	42	5,987	2,341	485	214				.295	.365	.450	.815
10	Mariners	1.85	300	162	2001	.716	116	46	5,680	927	1,637	310	38	169	881	614	62	989	174	42	6,474	2,530	517	48	70	54	112	.288	.360	.445	.805
11	Cardinals	1.8	282	157	1944	.682	105	49	5,474	772	1,507	274	59	100	722	543	27	471	37		6,168	2,199	433	124			96	.275	.344	.402	.745
12	Yankees	1.78	278	156	1932	.695	107	47	5,476	1,002	1,564	279	82	160	954	765	27	526	77	66	6,344	2,487	521	76				.286	.376	.454	.830
13	Cardinals	1.76	275	156	1942	.688	106	48	5,422	755	1,454	282	69	60	680	551	22	505	71		6,125	2,054	411	130			90	.268	.338	.379	.717
14	Indians	1.75	273	156	1948	.626	97	58	5,446	840	1,534	242	54	155	801	646	24	575	54	44	6,201	2,349	451	85			132	.282	.360	.431	.792
15	Astros	1.73	280	162	2019	.660	107	55	5,613	920	1,538	323	28	288	891	645	66	1,166	67	27	6,391	2,781	639	10	57	17	146	.274	.352	.495	.848
16	Dodgers	1.72	266	155	1953	.682	105	49	5,373	955	1,529	274	59	208	887	655	35	686	90	47	6,138	2,545	541	75			115	.285	.366	.474	.840
17	Dodgers	1.69	273	162	2019	.654	106	56	5,493	886	1,414	302	20	279	861	607	81	1,356	57	10	6,281	2,593	601	55	45	47	100	.257	.338	.472	.810
18	Yankees	1.68	254	151	1953	.656	99	52	5,194	801	1,420	226	52	139	762	655	34	643	34	44	5,960	2,167	417	77			105	.273	.358	.417	.776
19	Tigers	1.66	253	152	1935	.616	93	58	5,423	918	1,573	301	83	106	841	628	19	453	70	45	6,182	2,358	490	112				.290	.366	.435	.801
20	Cubs	1.63	251	154	1935	.649	100	54	5,486	847	1,581	303	62	88	782	464	33	471	66		6,133	2,272	453	150			115	.288	.347	.414	.761
21	Tigers	1.63	251	154	1934	.656	101	53	5,471	959	1,643	349	53	74	871	636	24	526	125	55	6,232	2,320	476	101				.300	.376	.424	.800
22	Yankees	1.62	255	157	1938	.651	99	53	5,410	966	1,480	283	63	174	918	749	39	617	91	28	6,259	2,411	520	61				.274	.366	.446	.812
23	Astros	1.62	263	162	2018	.636	103	59	5,453	797	1,390	278	18	205	763	565	61	1,197	71	26	6,138	2,319	501	14	45	19	156	.255	.329	.425	.754
24	Indians	1.62	233	144	1995	.694	100	44	5,028	840	1,461	279	23	207	803	542	35	766	132	53	5,684	2,407	509	31	48	40	128	.291	.361	.479	.839
25	Orioles	1.62	262	162	1969	.673	109	53	5,518	779	1,465	234	29	175	722	634	43	806	82	45	6,328	2,282	438	74	59	62	138	.265	.343	.414	.756