Mark McGwire had the most games with 2+ home runs in 1999, with 9 games.

Interpreted as:

most games by a player with 2+ home run 1999

	NAME	G	HR	SEASON	TM	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mark McGwire M. McGwire	9	18	1999	STL	35	19	23	0	0	31	7	0	4	0	0	42	77	18	0	0	2	0	.657	.714	2.200	2.914
2	Barry Bonds B. Bonds	7	14	1999	SFG	28	16	16	0	0	22	4	0	3	1	0	32	58	14	0	0	0	1	.571	.625	2.071	2.696
3	Steve Finley S. Finley	7	15	1999	ARI	32	19	22	1	0	30	0	0	5	2	0	33	68	16	1	0	0	0	.688	.688	2.125	2.813
4	Alex Rodriguez A. Rodriguez	6	12	1999	SEA	26	16	16	0	0	18	2	1	2	1	0	29	52	12	0	0	0	0	.615	.655	2.000	2.655
5	Sammy Sosa S. Sosa	6	12	1999	CHC	27	13	14	0	0	21	1	0	4	1	1	28	50	12	0	0	0	0	.519	.536	1.852	2.388
6	Todd Helton T. Helton	6	12	1999	COL	28	12	15	1	0	20	1	0	2	1	0	29	52	13	0	0	0	0	.536	.552	1.857	2.409
7	Chipper Jones C. Jones	6	12	1999	ATL	23	13	12	0	0	16	3	0	1	3	0	26	48	12	0	0	0	0	.522	.577	2.087	2.664
8	Carlos Delgado C. Delgado	6	13	1999	TOR	25	16	14	1	0	18	1	1	2	0	0	29	54	14	0	2	1	0	.560	.552	2.160	2.712
9	Nomar Garciaparra N. Garciaparra	5	11	1999	BOS	23	12	12	0	0	23	2	0	1	0	0	25	45	11	0	0	0	0	.522	.560	1.957	2.517
10	Brian Giles B. Giles	5	10	1999	PIT	21	11	12	0	0	17	2	0	0	0	0	23	42	10	0	0	1	0	.571	.609	2.000	2.609
11	Juan Gonzalez J. Gonzalez	5	11	1999	TEX	25	11	13	0	0	22	0	0	2	0	0	25	46	11	0	0	0	0	.520	.520	1.840	2.360
12	Ivan Rodriguez I. Rodriguez	5	10	1999	TEX	26	14	16	1	0	24	0	0	2	1	0	27	47	11	0	1	0	0	.615	.593	1.808	2.400
13	John Jaha J. Jaha	5	10	1999	OAK	21	12	12	0	0	19	3	1	4	0	0	25	42	10	0	0	0	0	.571	.640	2.000	2.640
14	Raul Mondesi R. Mondesi	5	10	1999	LAD	18	11	12	0	0	21	3	0	1	1	0	21	42	10	0	0	0	0	.667	.714	2.333	3.048
15	Manny Ramirez M. Ramirez	4	9	1999	CLE	16	11	11	1	0	18	2	0	1	0	0	18	39	10	0	0	0	0	.688	.722	2.438	3.160
16	Jermaine Dye J. Dye	4	8	1999	KCR	17	8	11	0	0	15	1	0	0	0	0	19	35	8	0	1	0	0	.647	.632	2.059	2.690
17	Dante Bichette D. Bichette	4	8	1999	COL	18	9	12	1	0	17	2	0	0	0	0	20	37	9	0	0	0	0	.667	.700	2.056	2.756
18	Carl Everett C. Everett	4	8	1999	HOU	21	9	9	0	0	14	0	1	4	0	0	22	33	8	0	0	0	0	.429	.455	1.571	2.026
19	Eric Karros E. Karros	4	8	1999	LAD	15	9	9	0	0	13	1	0	1	0	0	18	33	8	0	2	0	1	.600	.556	2.200	2.756
20	Edgar Martinez E. Martinez	4	9	1999	SEA	16	13	10	0	0	15	4	0	1	0	0	20	37	9	0	0	0	1	.625	.700	2.313	3.013
21	Larry Walker L. Walker	4	9	1999	COL	17	9	11	0	0	19	0	1	3	0	1	18	38	9	0	0	0	0	.647	.667	2.235	2.902
22	Ken Griffey Jr. K. Griffey Jr.	4	8	1999	SEA	17	9	11	1	0	17	2	0	0	0	0	19	36	9	0	0	0	0	.647	.684	2.118	2.802
23	Fernando Tatis F. Tatis	4	8	1999	STL	18	8	9	0	0	19	0	0	3	1	0	18	33	8	0	0	0	1	.500	.500	1.833	2.333
24	Jeff Bagwell J. Bagwell	4	10	1999	HOU	18	11	10	0	0	17	2	0	2	1	0	20	40	10	0	0	0	0	.556	.600	2.222	2.822
25	Jason Giambi J. Giambi	4	8	1999	OAK	18	9	9	0	0	16	1	0	1	0	0	19	33	8	0	0	0	0	.500	.526	1.833	2.360