Terrence Long was the youngest for the Mets in 1999. He was 23 years old in his rookie season.

	NAME	AGE	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Terrence Long T. Long	23	1999	NYM	3	3	0	0	0	0	0	0	0	0	2	0	0	3	0	0	0	0	0	1	.000	.000	.000	.000	0	-0.9	.000	-117	-0.9
2	Roger Cedeno R. Cedeno	24	1999	NYM	155	453	90	142	23	4	4	36	60	3	100	66	17	525	185	31	7	2	3	5	.313	.396	.408	.804	78	9.6	.362	113	9.5
3	Glendon Rusch G. Rusch	24	1999	NYM
4	Jorge Toca J. Toca	24	1999	NYM	4	3	0	1	0	0	0	0	0	0	2	0	0	3	1	0	0	0	0	0	.333	.333	.333	.667	0	-0.1	.301	74	-0.1
5	Edgardo Alfonzo E. Alfonzo	25	1999	NYM	158	628	123	191	41	1	27	108	85	3	85	9	2	726	315	69	1	9	2	14	.304	.385	.502	.886	122	27.5	.384	128	27.3
6	Octavio Dotel O. Dotel	25	1999	NYM	18	24	2	3	0	0	0	1	4	1	17	0	0	30	3	0	1	0	0	0	.125	.276	.125	.401	1	-3.2	.219	22	-3.2
7	Dan Murray D. Murray	25	1999	NYM
8	Armando Benitez A. Benitez	26	1999	NYM	72	5	0	0	0	0	0	1	0	0	2	0	0	5	0	0	0	0	0	0	.000	.000	.000	.000	-1	-1.5	.000	-117	-1.5
9	Jason Isringhausen J. Isringhausen	26	1999	NYM	11	12	2	1	1	0	0	1	0	0	4	0	0	13	2	1	1	0	0	0	.083	.083	.167	.250	-1	-2.7	.104	-51	-2.7
10	Mike Kinkade M. Kinkade	26	1999	NYM	28	46	3	9	2	1	2	6	3	2	9	1	0	51	19	5	0	0	0	1	.196	.275	.413	.688	5	-1.8	.299	73	-1.8
11	Jay Payton J. Payton	26	1999	NYM	13	8	1	2	1	0	0	1	0	1	2	1	2	9	3	1	0	0	0	0	.250	.333	.375	.708	1	-0.1	.322	88	-0.1
12	Vance Wilson V. Wilson	26	1999	NYM	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
13	Benny Agbayani B. Agbayani	27	1999	NYM	101	276	42	79	18	3	14	42	32	3	60	6	4	314	145	35	0	3	4	8	.286	.363	.525	.888	51	9.8	.377	123	9.7
14	Jermaine Allensworth J. Allensworth	27	1999	NYM	40	73	14	16	2	0	3	9	9	1	23	2	1	86	27	5	2	1	0	1	.219	.310	.370	.679	8	-2.7	.304	77	-2.7
15	Melvin Mora M. Mora	27	1999	NYM	66	31	6	5	0	0	0	1	4	1	7	2	1	39	5	0	3	0	0	0	.161	.278	.161	.439	1	-3.9	.226	27	-3.9
16	Luis Lopez L. Lopez	28	1999	NYM	68	104	11	22	4	0	2	13	12	3	33	1	1	121	32	6	1	1	0	1	.212	.308	.308	.616	10	-5.8	.286	65	-5.8
17	Pat Mahomes P. Mahomes	28	1999	NYM	40	16	2	5	3	0	0	3	0	0	6	0	0	16	8	3	0	0	0	0	.313	.313	.500	.813	2	0.1	.347	104	0.1
18	Rey Ordonez R. Ordonez	28	1999	NYM	154	520	49	134	24	2	1	60	49	1	59	8	4	588	165	27	11	7	12	16	.258	.319	.317	.636	46	-30.1	.282	62	-30.2
19	Jeff Tam J. Tam	28	1999	NYM
20	Allen Watson A. Watson	28	1999	NYM	13	10	0	3	1	0	0	0	0	0	1	0	0	10	4	1	0	0	0	3	.300	.300	.400	.700	1	-0.3	.305	77	-0.3
21	Rigo Beltran R. Beltran	29	1999	NYM	20	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	1	.000	.000	.000	.000	0	-0.3	.000	-117	-0.3
22	Matt Franco M. Franco	29	1999	NYM	122	132	18	31	5	0	4	21	28	0	21	0	0	161	48	9	0	1	3	9	.235	.366	.364	.730	19	-1.6	.329	92	-1.6
23	Shane Halter S. Halter	29	1999	NYM	7	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
24	Bobby Jones B. Jones	29	1999	NYM	12	16	1	5	0	0	1	1	0	0	4	0	0	17	8	1	1	0	0	0	.313	.313	.500	.813	2	0.1	.348	104	0.1
25	John Olerud J. Olerud	30	1999	NYM	162	581	107	173	39	0	19	96	125	11	66	3	0	723	269	58	0	6	5	22	.298	.427	.463	.890	129	34.9	.396	135	34.7