The Seattle Mariners launched the most home runs by a team in 1998, with 234 home runs.

	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	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
2	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
3	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
4	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
5	Orioles	214	1998	162	.488	79	83	5,565	817	1,520	303	11	783	593	58	903	86	48	6,304	2,487	528	44	44	30	136	.273	.347	.447	.794
6	Cubs	212	1998	163	.552	90	73	5,649	831	1,494	250	34	788	601	39	1,223	65	44	6,393	2,448	496	67	37	51	123	.264	.337	.433	.771
7	Yankees	207	1998	162	.704	114	48	5,643	965	1,625	290	31	907	653	57	1,025	153	63	6,444	2,598	528	32	59	34	145	.288	.364	.460	.825
8	Red Sox	205	1998	162	.568	92	70	5,601	876	1,568	338	35	827	541	70	1,049	72	39	6,299	2,591	578	35	52	32	144	.280	.348	.463	.810
9	Rangers	201	1998	162	.543	88	74	5,672	940	1,637	314	32	894	595	39	1,045	82	47	6,401	2,618	547	41	54	27	137	.289	.357	.462	.819
10	White Sox	198	1998	163	.494	80	82	5,585	861	1,516	291	38	806	551	47	916	127	46	6,280	2,477	527	38	59	34	119	.271	.339	.444	.782
11	Indians	198	1998	162	.549	89	73	5,616	850	1,530	334	30	811	630	41	1,061	143	60	6,376	2,518	562	30	59	35	123	.272	.347	.448	.795
12	Rockies	183	1998	162	.475	77	85	5,632	826	1,640	333	36	791	469	37	949	67	47	6,277	2,594	552	98	41	29	148	.291	.347	.461	.808
13	Padres	167	1998	162	.605	98	64	5,490	749	1,390	292	30	715	604	48	1,072	79	37	6,243	2,243	489	56	45	40	112	.253	.330	.409	.739
14	Astros	166	1998	162	.630	102	60	5,641	874	1,578	326	28	818	621	72	1,122	155	51	6,441	2,458	520	58	49	52	146	.280	.356	.436	.792
15	Tigers	165	1998	162	.401	65	97	5,664	722	1,494	306	29	691	455	62	1,070	122	62	6,242	2,353	500	16	45	25	111	.264	.323	.415	.738
16	Giants	161	1998	163	.546	89	74	5,628	845	1,540	292	26	800	678	44	1,040	102	51	6,484	2,367	479	81	53	53	123	.274	.353	.421	.774
17	Dodgers	159	1998	162	.512	83	79	5,459	669	1,374	209	27	630	447	36	1,056	137	53	6,076	2,114	395	91	43	31	98	.252	.310	.387	.698
18	Diamondbacks	159	1998	162	.401	65	97	5,491	665	1,353	235	46	621	489	64	1,239	73	38	6,116	2,157	440	45	27	32	125	.246	.314	.393	.707
19	Brewers	152	1998	162	.457	74	88	5,541	707	1,439	266	17	673	532	66	1,039	81	59	6,232	2,195	435	61	32	36	135	.260	.330	.396	.726
20	Athletics	149	1998	162	.457	74	88	5,490	804	1,413	295	13	755	633	55	1,122	131	47	6,282	2,181	457	58	46	22	120	.257	.338	.397	.735
21	Angels	147	1998	162	.525	85	77	5,630	787	1,530	314	27	739	510	48	1,028	93	45	6,278	2,339	488	49	41	31	122	.272	.335	.415	.751
22	Expos	147	1998	162	.401	65	97	5,418	644	1,348	280	32	602	439	60	1,058	91	46	6,041	2,133	459	87	37	31	109	.249	.310	.394	.704
23	Reds	138	1998	162	.475	77	85	5,496	750	1,441	298	28	723	608	37	1,107	95	42	6,268	2,209	464	78	49	39	133	.262	.337	.402	.739
24	Mets	136	1998	162	.543	88	74	5,510	706	1,425	289	24	671	572	37	1,049	62	46	6,255	2,170	449	88	48	55	126	.259	.330	.394	.724
25	Royals	134	1998	161	.447	72	89	5,546	714	1,459	274	40	686	475	60	984	135	50	6,191	2,215	448	45	65	24	118	.263	.324	.399	.724