highest slugging percentage by a team in a season before 1990

Before 1990, the New York Yankees had the best slugging percentage by a team in a season, with a slugging percentage of .488 in 1927.

	TEAM	SLG	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	OPS
1	Yankees	.488	1927	155	.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	.872
2	Yankees	.488	1930	154	.558	86	68	5,447	1,062	1,683	298	110	152	985	644	19	569	91	60	6,272	2,657	560	162				.309	.384	.872
3	Beaneaters	.484	1894	133	.629	83	49	5,011	1,220	1,658	272	94	103	1,043	535	47	261	241		5,657	2,427	469	64				.331	.401	.885
4	Yankees	.483	1936	155	.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	.864
5	Orioles	.483	1894	129	.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	.901
6	Cubs	.481	1930	156	.584	90	64	5,581	998	1,722	305	72	171	940	588	37	635	70		6,354	2,684	548	148				.309	.378	.859
7	Phillies	.478	1894	132	.555	71	57	5,089	1,179	1,780	259	137	40	1,007	508	58	254	285		5,777	2,433	436	122				.350	.415	.893
8	Dodgers	.474	1953	155	.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	.840
9	Giants	.473	1930	154	.565	87	67	5,553	959	1,769	264	83	143	880	422	21	382	59		6,161	2,628	490	165				.319	.369	.842
10	Cardinals	.471	1930	154	.597	92	62	5,512	1,004	1,732	373	89	104	942	479	28	496	72		6,204	2,595	566	185				.314	.372	.843
11	Phillies	.467	1929	154	.464	71	82	5,484	897	1,693	305	51	153	841	573	24	470	59		6,216	2,559	509	135				.309	.377	.843
12	Red Sox	.465	1977	161	.602	97	64	5,510	859	1,551	258	56	213	828	528	42	905	66	47	6,184	2,560	527	45	59	38	132	.281	.345	.810
13	Yankees	.464	1921	153	.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	.838
14	Red Sox	.464	1950	154	.610	94	60	5,516	1,027	1,665	287	61	161	974	719	25	580	32	17	6,322	2,557	509	62			153	.302	.385	.848
15	Indians	.461	1936	157	.519	80	74	5,646	921	1,715	357	82	123	853	512	16	470	66	53	6,251	2,605	562	77				.304	.363	.825
16	Phillies	.458	1930	156	.338	52	102	5,667	944	1,783	345	44	126	884	450	23	459	34		6,288	2,594	515	148				.315	.367	.825
17	Yankees	.457	1931	155	.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	.840
18	Athletics	.457	1932	154	.610	94	60	5,535	981	1,606	303	52	172	923	650	21	629	37	24	6,300	2,529	527	94				.290	.367	.824
19	Yankees	.456	1937	157	.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	.825
20	Red Sox	.456	1979	160	.569	91	69	5,538	841	1,567	310	34	194	805	512	33	708	60	43	6,184	2,527	538	42	59	38	158	.283	.344	.800
21	Brewers	.455	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	.789
22	Robins	.454	1930	154	.558	86	68	5,433	871	1,654	303	73	122	836	481	27	541	53		6,088	2,469	498	147				.304	.364	.818
23	Yankees	.454	1932	156	.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	.830
24	Giants	.454	1947	155	.526	81	73	5,343	830	1,446	220	48	221	790	494	23	570	29		5,924	2,425	489	64			114	.271	.335	.789
25	Browns	.453	1922	154	.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	.822