Mark McGwire launched the most homers in 1998, with 70 homers.

	NAME	HR	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Mark McGwire M. McGwire	70	1998	STL	155	509	130	152	21	0	147	162	6	155	1	0	681	383	91	0	4	28	8	.299	.470	.752	1.222	176	91.7	.492	205	90.7
2	Sammy Sosa S. Sosa	66	1998	CHC	159	643	134	198	20	0	158	73	1	171	18	9	722	416	86	0	5	14	20	.308	.377	.647	1.024	146	56.6	.425	159	53.7
3	Ken Griffey Jr. K. Griffey Jr.	56	1998	SEA	161	633	120	180	33	3	146	76	7	121	20	5	720	387	92	0	4	11	14	.284	.365	.611	.977	135	46	.408	145	41.8
4	Greg Vaughn G. Vaughn	50	1998	SDP	158	573	112	156	28	4	119	79	5	121	11	4	661	342	82	0	4	6	7	.272	.363	.597	.960	121	39.6	.403	151	42.7
5	Albert Belle A. Belle	49	1998	CWS	163	609	113	200	48	2	152	81	1	84	6	4	706	399	99	0	15	10	17	.328	.399	.655	1.055	150	62.1	.437	165	59.7
6	Jose Canseco J. Canseco	46	1998	TOR	151	583	98	138	26	0	107	65	6	159	29	17	658	302	72	0	4	5	7	.237	.318	.518	.836	94	12.7	.354	110	8.9
7	Vinny Castilla V. Castilla	46	1998	COL	162	645	108	206	28	4	144	40	6	89	5	9	697	380	78	0	6	7	24	.319	.362	.589	.951	127	40.6	.401	120	18
8	Juan Gonzalez J. Gonzalez	45	1998	TEX	154	606	110	193	50	2	157	46	6	126	2	1	669	382	97	0	11	9	20	.318	.366	.630	.997	129	46.3	.414	145	39.1
9	Manny Ramirez M. Ramirez	45	1998	CLE	150	571	108	168	35	2	145	76	6	121	5	3	663	342	82	0	10	6	18	.294	.377	.599	.976	125	43.3	.409	144	37.8
10	Andres Galarraga A. Galarraga	44	1998	ATL	153	555	103	169	27	1	121	63	25	146	7	6	648	330	72	0	5	11	8	.305	.397	.595	.991	127	47.2	.418	156	46.2
11	Rafael Palmeiro R. Palmeiro	43	1998	BAL	162	619	98	183	36	1	121	79	7	91	11	7	709	350	80	0	4	8	14	.296	.379	.565	.945	129	41.5	.401	144	40
12	Alex Rodriguez A. Rodriguez	42	1998	SEA	161	686	123	213	35	5	124	45	10	121	46	13	748	384	82	3	4	0	12	.310	.360	.560	.919	132	39	.394	136	34.6
13	Mo Vaughn M. Vaughn	40	1998	BOS	154	609	107	205	31	2	115	61	8	144	0	0	681	360	73	0	3	13	13	.337	.402	.591	.993	135	50.9	.421	151	45.2
14	Moises Alou M. Alou	38	1998	HOU	159	584	104	182	34	5	124	84	5	87	11	3	679	340	77	0	6	11	14	.312	.399	.582	.981	131	47.2	.415	159	50.4
15	Jeromy Burnitz J. Burnitz	38	1998	MIL	161	609	92	160	28	1	125	70	4	158	7	4	691	304	67	1	7	7	9	.263	.339	.499	.838	101	15.3	.358	115	13.4
16	Carlos Delgado C. Delgado	38	1998	TOR	142	530	94	155	43	1	115	73	11	139	3	0	620	314	82	0	6	13	8	.292	.385	.592	.978	117	40.3	.409	146	36.7
17	Vladimir Guerrero V. Guerrero	38	1998	MON	159	623	108	202	37	7	109	42	7	95	11	9	677	367	82	0	5	13	15	.324	.371	.589	.960	124	40.4	.403	145	38.6
18	Barry Bonds B. Bonds	37	1998	SFG	156	552	120	167	44	7	122	130	8	92	28	12	697	336	88	1	6	29	15	.303	.438	.609	1.047	146	59.8	.434	170	61.3
19	Nomar Garciaparra N. Garciaparra	35	1998	BOS	143	604	111	195	37	8	122	33	8	62	12	6	652	353	80	0	7	1	20	.323	.362	.584	.946	119	38.3	.402	139	32.8
20	Shawn Green S. Green	35	1998	TOR	158	630	106	175	33	4	100	50	5	142	35	12	689	321	72	1	3	2	6	.278	.334	.510	.844	103	17.8	.362	115	13.7
21	Jeff Bagwell J. Bagwell	34	1998	HOU	147	540	124	164	33	1	111	109	7	90	19	7	661	301	68	0	5	8	14	.304	.424	.557	.981	131	49.3	.421	163	52.4
22	Tony Clark T. Clark	34	1998	DET	157	602	84	175	37	0	103	63	3	128	3	3	673	314	71	0	5	5	16	.291	.358	.522	.880	109	25.6	.377	124	20.8
23	Chipper Jones C. Jones	34	1998	ATL	160	601	123	188	29	5	107	96	1	93	16	6	707	329	68	1	8	1	17	.313	.404	.547	.951	134	46.3	.410	151	45.2
24	Javy Lopez J. Lopez	34	1998	ATL	133	489	73	139	21	1	106	30	6	85	5	3	534	264	56	1	8	1	22	.284	.328	.540	.868	83	16.4	.368	123	15.6
25	Dean Palmer D. Palmer	34	1998	KCR	152	572	84	159	27	2	119	48	6	134	8	2	639	292	63	0	13	3	18	.278	.333	.510	.844	94	14.6	.359	111	9.2