which team had the most home runs in a season before 2000

Before 2000, the Seattle Mariners hit the most home runs by a team in a season, with 264 home runs in 1997.

	TEAM	HR	SEASON	G	W%	W	L	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mariners	264	1997	162	.556	90	72	5,614	925	1,574	312	21	890	626	49	1,110	89	40	6,384	2,720	597	46	49	53	146	.280	.355	.485	.839
2	Orioles	257	1996	163	.543	88	74	5,689	949	1,557	299	29	914	645	61	915	76	40	6,493	2,685	585	31	67	49	134	.274	.350	.472	.822
3	Mariners	245	1996	161	.528	85	76	5,668	993	1,625	343	19	954	670	75	1,052	90	39	6,517	2,741	607	46	58	57	121	.287	.366	.484	.850
4	Mariners	244	1999	162	.488	79	83	5,572	859	1,499	263	21	825	610	42	1,095	130	45	6,310	2,536	528	38	48	38	114	.269	.343	.455	.798
5	Athletics	243	1996	162	.481	78	84	5,630	861	1,492	283	21	823	640	58	1,114	58	35	6,402	2,546	547	35	39	36	134	.265	.344	.452	.796
6	Yankees	240	1961	163	.673	109	53	5,559	827	1,461	194	40	781	543	35	785	28	18	6,239	2,455	474	57	45	45	120	.263	.330	.442	.771
7	Rockies	239	1997	162	.512	83	79	5,603	923	1,611	269	40	869	562	63	1,060	137	65	6,336	2,677	548	73	35	35	138	.288	.357	.478	.835
8	Athletics	235	1999	162	.537	87	75	5,519	893	1,430	287	20	845	770	71	1,129	70	37	6,440	2,462	542	39	41	32	129	.259	.355	.446	.801
9	Mariners	234	1998	161	.472	76	85	5,628	859	1,553	321	28	822	558	57	1,081	115	39	6,327	2,632	583	36	48	26	107	.276	.345	.468	.812
10	Rangers	230	1999	162	.586	95	67	5,651	945	1,653	304	29	897	611	29	937	111	54	6,388	2,705	563	35	62	41	147	.293	.361	.479	.840
11	Tigers	225	1987	162	.605	98	64	5,649	896	1,535	274	32	840	653	46	913	106	50	6,443	2,548	531	39	56	44	108	.272	.349	.451	.800
12	Twins	225	1963	161	.565	91	70	5,531	767	1,408	223	35	722	547	41	912	32	14	6,233	2,376	483	84	30	41	116	.255	.325	.430	.754
13	Rockies	223	1999	162	.444	72	90	5,717	906	1,644	305	39	863	508	43	863	70	43	6,368	2,696	567	54	46	31	125	.288	.348	.472	.819
14	Cardinals	223	1998	163	.512	83	79	5,593	810	1,444	292	30	781	676	42	1,179	133	41	6,413	2,465	545	68	34	65	117	.258	.341	.441	.781
15	Blue Jays	221	1998	163	.543	88	74	5,580	816	1,482	316	19	776	564	87	1,132	184	81	6,323	2,499	556	43	49	43	108	.266	.340	.448	.787
16	Rangers	221	1996	163	.556	90	72	5,702	928	1,622	323	32	890	660	31	1,041	83	26	6,494	2,672	576	32	69	51	128	.284	.358	.469	.827
17	Rockies	221	1996	162	.512	83	79	5,590	961	1,607	297	37	909	527	82	1,108	201	66	6,332	2,641	555	81	52	40	118	.287	.355	.472	.827
18	Twins	221	1964	163	.488	79	83	5,610	737	1,413	227	46	707	553	44	1,019	46	22	6,318	2,395	494	74	37	43	120	.252	.322	.427	.749
19	Redlegs	221	1956	155	.591	91	63	5,291	775	1,406	201	32	734	528	51	760	45	22	6,003	2,334	454	90	43	69	112	.266	.336	.441	.777
20	Giants	221	1947	155	.526	81	73	5,343	830	1,446	220	48	790	494	23	570	29		5,924	2,425	489	64			114	.271	.335	.454	.789
21	Indians	220	1997	161	.534	86	75	5,556	868	1,589	301	22	810	617	37	955	118	59	6,304	2,594	543	45	49	39	152	.286	.358	.467	.825
22	Indians	218	1996	161	.615	99	62	5,681	952	1,665	335	23	904	671	43	844	160	50	6,486	2,700	576	34	57	44	164	.293	.369	.475	.844
23	Diamondbacks	216	1999	162	.617	100	62	5,658	908	1,566	289	46	865	588	48	1,045	137	39	6,415	2,595	551	61	60	52	94	.277	.347	.459	.805
24	Brewers	216	1982	163	.586	95	67	5,733	891	1,599	277	41	843	484	18	714	84	52	6,337	2,606	534	56	46	42	106	.279	.335	.455	.789
25	Braves	215	1998	162	.654	106	56	5,484	826	1,489	297	26	794	548	61	1,062	98	43	6,215	2,483	538	76	46	37	104	.272	.342	.453	.795