Between the 1990 and 1999 seasons, Ken Griffey Jr. played the most seasons with 40+ home runs, with 6 seasons.

Interpreted as:

most seasons by a player 40+ home runs 1990 to 1999

	NAME	SEAS	HR	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	Ken Griffey Jr. K. Griffey Jr.	6	294	885	3,407	700	1,023	181	18	766	473	37	618	103	29	3,952	2,122	493	1	34	108	64	.300	.388	.623	1.011	780	285.1	.419	152	266.4
2	Juan Gonzalez J. Gonzalez	5	223	716	2,800	468	839	164	10	659	196	30	557	8	3	3,059	1,692	397	0	33	36	70	.300	.348	.604	.952	554	185.4	.402	141	160.7
3	Mark McGwire M. McGwire	5	287	733	2,460	525	702	112	1	634	602	30	672	4	1	3,118	1,677	400	0	26	93	53	.285	.428	.682	1.110	708	324.9	.457	179	317.3
4	Vinny Castilla V. Castilla	3	126	481	1,886	299	583	87	6	370	119	19	285	14	15	2,038	1,060	219	0	14	23	61	.309	.354	.562	.916	348	93.2	.387	112	30.9
5	Andres Galarraga A. Galarraga	3	132	466	1,781	342	550	97	7	411	157	59	444	40	22	2,013	1,057	236	0	16	16	30	.309	.381	.593	.974	387	134.4	.412	136	92.9
6	Sammy Sosa S. Sosa	3	169	445	1,766	332	514	65	4	399	185	9	476	43	22	1,975	1,094	238	0	15	28	51	.291	.358	.619	.978	370	117.8	.406	144	111.6
7	Greg Vaughn G. Vaughn	3	136	456	1,639	314	425	67	7	354	246	14	388	35	9	1,913	914	210	0	14	15	23	.259	.358	.558	.916	327	82.9	.387	131	77.3
8	Albert Belle A. Belle	3	147	464	1,757	358	560	138	6	426	253	14	251	22	6	2,050	1,151	291	0	26	30	61	.319	.403	.655	1.059	442	184.2	.440	162	169.4
9	Jay Buhner J. Buhner	3	124	433	1,574	297	407	70	2	368	263	15	454	0	2	1,871	853	196	2	17	15	49	.259	.367	.542	.908	320	84.5	.387	129	71.7
10	Barry Bonds B. Bonds	3	128	476	1,588	374	495	91	12	353	422	11	242	106	27	2,039	994	231	0	18	107	35	.312	.455	.626	1.081	449	196.2	.447	179	202.5
11	Frank Thomas F. Thomas	3	121	439	1,569	318	510	89	0	373	357	13	198	8	5	1,972	962	210	0	33	78	49	.325	.446	.613	1.059	426	181.2	.442	169	176.8
12	Rafael Palmeiro R. Palmeiro	2	90	320	1,184	194	366	66	2	269	176	10	160	13	11	1,383	706	158	0	13	22	27	.309	.399	.596	.995	273	97.4	.418	150	90.9
13	Manny Ramirez M. Ramirez	2	89	297	1,093	239	342	69	5	310	172	19	252	7	7	1,303	688	163	0	19	15	30	.313	.409	.629	1.039	274	109	.434	158	99.6
14	Alex Rodriguez A. Rodriguez	2	84	290	1,188	233	356	60	5	235	101	15	230	67	20	1,320	678	149	4	12	2	24	.300	.359	.571	.929	233	66	.394	136	62.6
15	Jeff Bagwell J. Bagwell	2	85	324	1,128	252	333	75	2	261	276	27	249	61	21	1,446	667	162	0	15	43	28	.295	.440	.591	1.031	302	118.9	.433	165	123.3
16	Mike Piazza M. Piazza	2	80	293	1,090	204	363	57	1	248	120	4	147	7	3	1,226	662	138	0	12	22	46	.333	.397	.607	1.005	243	88.3	.422	158	91.3
17	Mo Vaughn M. Vaughn	2	84	315	1,244	225	412	60	3	258	156	22	298	2	0	1,433	730	147	0	11	32	30	.331	.412	.587	.999	288	106.8	.422	148	91.8
18	Jose Canseco J. Canseco	2	90	305	1,155	213	290	58	1	229	143	15	311	55	23	1,323	620	149	0	10	12	23	.251	.339	.537	.875	210	53.8	.376	132	50.2
19	Cecil Fielder C. Fielder	2	95	321	1,197	206	322	50	1	265	168	11	333	0	1	1,385	659	146	0	9	23	32	.269	.362	.551	.912	239	83.2	.396	148	77.1
20	Carlos Delgado C. Delgado	1	44	152	573	113	156	39	0	134	86	15	141	1	1	681	327	83	0	7	7	11	.272	.377	.571	.948	123	34.5	.399	134	31.3
21	Shawn Green S. Green	1	42	153	614	134	190	45	0	123	66	11	117	20	7	696	361	87	0	5	4	13	.309	.384	.588	.972	133	42.4	.411	142	39.1
22	Vladimir Guerrero V. Guerrero	1	42	160	610	102	193	37	5	131	55	7	62	14	7	674	366	84	0	2	14	18	.316	.378	.600	.978	127	39.5	.408	139	35.8
23	Chipper Jones C. Jones	1	45	157	567	116	181	41	1	110	126	2	94	25	3	701	359	87	0	6	18	20	.319	.441	.633	1.074	156	64.5	.447	165	61.6
24	Tino Martinez T. Martinez	1	44	158	594	96	176	31	2	141	75	3	75	3	1	685	343	77	0	13	14	15	.296	.371	.577	.948	121	36.3	.396	141	35.8
25	Jim Thome J. Thome	1	40	147	496	104	142	25	0	102	120	3	146	1	1	627	287	65	0	8	9	9	.286	.423	.579	1.001	126	48.6	.425	156	44.9