Adrian Beltre was the youngest in 1998. He was 19 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	Adrian Beltre A. Beltre	19	1998	LAD	77	195	18	42	9	0	7	22	14	3	37	3	1	214	72	16	2	0	0	4	.215	.278	.369	.648	19	-7.9	.287	76	-6.6
2	Dee Brown D. Brown	20	1998	KCR	5	3	2	0	0	0	0	0	0	0	1	0	0	3	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.8	.000	-120	-0.9
3	Eric Chavez E. Chavez	20	1998	OAK	16	45	6	14	4	1	0	6	3	0	5	1	1	48	20	5	0	0	1	1	.311	.354	.444	.799	6	0.5	.343	104	0.2
4	Aramis Ramirez A. Ramirez	20	1998	PIT	72	251	23	59	9	1	6	24	18	4	72	0	1	275	88	16	1	1	0	3	.235	.296	.351	.646	24	-9.6	.290	69	-10.7
5	Matt Anderson M. Anderson	21	1998	DET
6	Michael Barrett M. Barrett	21	1998	MON	8	23	3	7	2	0	1	2	3	1	6	0	0	27	12	3	0	0	0	0	.304	.407	.522	.929	5	1.7	.407	148	1.6
7	Carlos Beltran C. Beltran	21	1998	KCR	14	58	12	16	5	3	0	7	3	1	12	3	0	63	27	8	0	1	0	2	.276	.317	.466	.783	8	0.2	.335	96	-0.3
8	Mike Caruso M. Caruso	21	1998	CWS	133	523	81	160	17	6	5	55	14	7	38	22	6	555	204	28	8	3	0	8	.306	.331	.390	.721	63	-5.6	.319	90	-7.5
9	Bruce Chen B. Chen	21	1998	ATL	4	7	0	1	0	0	0	1	0	0	4	0	0	9	1	0	2	0	0	0	.143	.143	.143	.286	0	-1.5	.128	-35	-1.5
10	Ben Davis B. Davis	21	1998	SDP	1	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-115	-0.3
11	Ryan Dempster R. Dempster	21	1998	FLA	12	13	0	0	0	0	0	0	0	0	8	0	0	14	0	0	1	0	0	1	.000	.000	.000	.000	-2	-3.9	.000	-117	-3.8
12	Joe Fontenot J. Fontenot	21	1998	FLA	6	10	1	0	0	0	0	0	0	0	6	0	0	11	0	0	1	0	0	0	.000	.000	.000	.000	-2	-3	.000	-117	-3
13	Troy Glaus T. Glaus	21	1998	ANA	48	165	19	36	9	0	1	23	15	0	51	1	0	182	48	10	0	2	0	3	.218	.280	.291	.571	12	-10.8	.260	50	-11.9
14	Alex Gonzalez A. Gonzalez	21	1998	FLA	25	86	11	13	2	0	3	7	9	1	30	0	0	98	24	5	2	0	0	2	.151	.240	.279	.519	5	-7.6	.238	40	-7.4
15	Roy Halladay R. Halladay	21	1998	TOR
16	Andruw Jones A. Jones	21	1998	ATL	159	582	89	158	33	8	31	90	40	4	129	27	4	631	300	72	1	4	8	10	.271	.321	.515	.836	89	11.2	.353	113	10.3
17	Gene Kingsale G. Kingsale	21	1998	BAL	11	2	1	0	0	0	0	0	0	0	1	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.6	.000	-115	-0.6
18	Javier Martinez J. Martinez	21	1998	PIT	34	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.3	.000	-122	-0.3
19	Odalis Perez O. Perez	21	1998	ATL
20	Calvin Pickering C. Pickering	21	1998	BAL	9	21	4	5	0	0	2	3	3	0	4	1	0	24	11	2	0	0	0	2	.238	.333	.524	.857	4	0.7	.369	122	0.7
21	A.J. Pierzynski	21	1998	MIN	7	10	1	3	0	0	0	1	1	1	2	0	0	13	3	0	0	1	0	0	.300	.385	.300	.685	1	-0.1	.319	85	-0.3
22	Sidney Ponson S. Ponson	21	1998	BAL	2	4	1	2	0	0	0	0	0	0	2	0	0	4	2	0	0	0	0	0	.500	.500	.500	1.000	1	0.4	.449	174	0.4
23	Dennys Reyes D. Reyes	21	1998	TOT	17	17	1	1	1	0	0	0	0	0	5	0	0	18	2	1	1	0	0	0	.059	.059	.118	.176	-2	-3.9	.074	-74	-4
24	Javier Vazquez J. Vazquez	21	1998	MON	31	52	3	9	2	1	0	5	2	0	7	0	0	61	13	3	6	1	0	1	.173	.200	.250	.450	1	-6.8	.198	10	-7
25	Kerry Wood K. Wood	21	1998	CHC	24	54	3	7	0	0	2	8	1	0	16	0	0	63	13	2	8	0	0	0	.130	.145	.241	.386	-1	-8.6	.168	-11	-8.9