highest run differential per game in an mlb season from 1920 to 1929

Between the 1920 and 1929 seasons, the New York Yankees had the highest run differential per game by a team in a season, with 2.39 in 1927.

	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	AVG	OBP	SLG	OPS
1	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
2	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
3	Yankees	1.58	242	153	1921	.641	98	55	5,250	948	1,576	284	87	134	875	575	41	571	89	64	6,056	2,436	505	190	.300	.374	.464	.838
4	Browns	1.52	234	154	1922	.604	93	61	5,425	868	1,684	292	94	98	785	471	35	380	136	75	6,130	2,458	484	199	.310	.369	.453	.822
5	Cubs	1.43	223	156	1929	.645	98	54	5,471	982	1,655	310	46	139	933	589	29	567	103		6,252	2,474	495	163	.303	.373	.452	.825
6	Giants	1.4	216	154	1924	.608	93	60	5,445	857	1,634	269	81	95	781	467	28	479	82	53	6,067	2,350	445	127	.300	.358	.432	.790
7	Indians	1.4	216	154	1921	.610	94	60	5,376	925	1,657	355	91	42	847	619	37	373	51	42	6,264	2,320	488	232	.308	.383	.432	.815
8	Athletics	1.39	213	153	1928	.641	98	55	5,241	828	1,541	326	75	89	760	532	37	435	59	54	6,006	2,284	490	196	.294	.363	.436	.799
9	Indians	1.38	212	154	1920	.636	98	56	5,203	856	1,575	301	95	35	757	574	36	376	73	93	6,067	2,171	431	254	.303	.376	.417	.793
10	Yankees	1.36	209	154	1928	.656	101	53	5,337	894	1,576	267	79	133	826	562	23	553	51	52	6,067	2,400	479	145	.295	.365	.450	.815
11	Giants	1.33	204	153	1921	.614	94	59	5,278	840	1,575	237	93	75	748	469	33	390	137	114	5,946	2,223	405	166	.298	.359	.421	.781
12	Yankees	1.33	205	154	1920	.617	95	59	5,174	837	1,447	268	71	115	751	532	23	621	64	81	5,901	2,202	454	172	.280	.349	.426	.775
13	Yankees	1.33	202	152	1923	.645	98	54	5,345	824	1,555	231	80	105	767	511	35	515	69	74	6,036	2,261	416	145	.291	.357	.423	.780
14	Pirates	1.29	197	153	1925	.621	95	58	5,372	912	1,651	316	105	78	820	499	30	363	159	63	6,036	2,411	499	135	.307	.369	.449	.818
15	Giants	1.24	194	156	1922	.604	93	61	5,454	852	1,661	253	90	80	756	448	48	421	116	83	6,109	2,334	423	159	.305	.363	.428	.790
16	Giants	1.24	188	152	1929	.556	84	67	5,388	897	1,594	251	47	136	829	482	36	405	85		6,060	2,347	434	154	.296	.358	.436	.793
17	Giants	1.14	175	153	1923	.621	95	58	5,452	854	1,610	248	76	85	790	487	31	406	106	70	6,083	2,265	409	113	.295	.356	.415	.772
18	Cardinals	1.12	172	154	1928	.617	95	59	5,357	807	1,505	292	70	113	749	568	32	438	82		6,144	2,276	475	187	.281	.353	.425	.778
19	Senators	1.04	158	152	1925	.636	96	55	5,191	828	1,576	251	71	56	747	541	44	420	135	92	5,984	2,137	378	208	.304	.374	.412	.786
20	Pirates	1.01	158	156	1927	.610	94	60	5,397	817	1,648	258	78	54	759	437	29	355	65		6,077	2,224	390	214	.305	.361	.412	.773
21	Giants	0.99	154	155	1928	.604	93	61	5,459	807	1,600	276	59	118	758	444	27	376	62		6,103	2,348	453	173	.293	.349	.430	.779
22	Indians	0.92	141	153	1923	.536	82	71	5,277	886	1,591	301	75	59	806	626	49	381	79	79	6,150	2,219	435	198	.301	.381	.421	.801
23	Senators	0.92	143	156	1924	.597	92	62	5,303	753	1,561	256	88	22	688	507	55	388	116	85	6,099	2,059	366	234	.294	.362	.388	.750
24	Yankees	0.9	139	154	1922	.610	94	60	5,240	757	1,502	221	73	95	698	498	40	529	62	58	5,998	2,154	389	220	.287	.353	.411	.764
25	Pirates	0.9	138	153	1924	.588	90	63	5,288	724	1,517	222	122	44	658	366	28	396	181	92	5,833	2,115	388	151	.287	.336	.400	.736