Mark Davis, Ricky Seilheimer and Fernando Valenzuela were tied for the youngest in 1980. They were 19 years old.

	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	Mark Davis M. Davis	19	1980	PHI	2	2	1	1	0	0	0	0	0	0	0	0	0	2	1	0	0	0	0	0	.500	.500	.500	1.000	0	0.2	.455	190	0.2
2	Ricky Seilheimer R. Seilheimer	19	1980	CWS	21	52	4	11	3	1	1	3	4	0	15	1	0	57	19	5	1	0	1	0	.212	.268	.365	.633	5	-1.9	.278	67	-2.2
3	Fernando Valenzuela F. Valenzuela	19	1980	LAD	10	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.2	.000	-117	-0.2
4	Wally Backman W. Backman	20	1980	NYM	27	93	12	30	1	1	0	9	11	1	14	2	3	110	33	2	4	1	1	3	.323	.396	.355	.751	14	2.1	.345	118	2.2
5	Dave Beard D. Beard	20	1980	OAK
6	Joseph DeSa J. DeSa	20	1980	STL	7	11	0	3	0	0	0	0	0	0	2	0	0	11	3	0	0	0	0	1	.273	.273	.273	.545	1	-0.6	.248	49	-0.6
7	Lenny Faedo L. Faedo	20	1980	MIN	5	8	1	2	1	0	0	0	0	0	0	0	0	9	3	1	1	0	0	0	.250	.250	.375	.625	1	-0.3	.276	63	-0.4
8	Rich Gedman R. Gedman	20	1980	BOS	9	24	2	5	0	0	0	1	0	0	5	0	0	24	5	0	0	0	0	1	.208	.208	.208	.417	0	-2.4	.189	4	-2.7
9	Drungo Hazewood D. Hazewood	20	1980	BAL	6	5	1	0	0	0	0	0	0	0	4	0	0	5	0	0	0	0	0	0	.000	.000	.000	.000	-1	-1.2	.000	-112	-1.2
10	Paul Hodgson P. Hodgson	20	1980	TOR	20	41	5	9	0	1	1	5	3	0	12	0	1	46	14	2	2	0	0	2	.220	.273	.341	.614	4	-1.5	.279	64	-1.9
11	Orlando Isales O. Isales	20	1980	PHI	3	5	1	2	0	1	0	3	1	0	0	0	0	6	4	1	0	0	0	0	.400	.500	.800	1.300	2	1	.544	252	1
12	Mike Jones M. Jones	20	1980	KCR
13	Dave LaPoint D. LaPoint	20	1980	MIL
14	Lloyd Moseby L. Moseby	20	1980	TOR	114	389	44	89	24	1	9	46	25	4	85	4	6	430	142	34	10	2	4	11	.229	.281	.365	.646	38	-10.6	.288	70	-15
15	Tim Raines T. Raines	20	1980	MON	15	20	5	1	0	0	0	0	6	0	3	5	0	27	1	0	1	0	0	0	.050	.269	.050	.319	0	-2.5	.198	16	-2.5
16	Bruce Robbins B. Robbins	20	1980	DET
17	Luis Aguayo L. Aguayo	21	1980	PHI	20	47	7	13	1	2	1	8	2	0	3	1	1	50	21	4	0	1	0	0	.277	.300	.447	.747	6	0.2	.327	102	0.1
18	Danny Ainge D. Ainge	21	1980	TOR	38	111	11	27	6	1	0	4	2	1	29	3	0	115	35	7	1	0	0	3	.243	.263	.315	.578	8	-5.2	.261	53	-6.4
19	Harold Baines H. Baines	21	1980	CWS	141	491	55	125	23	6	13	49	19	1	65	2	4	518	199	42	2	5	7	15	.255	.281	.405	.686	50	-8.4	.299	81	-11.4
20	Rich Bordi R. Bordi	21	1980	OAK
21	Britt Burns B. Burns	21	1980	CWS
22	Marty Bystrom M. Bystrom	21	1980	PHI	6	14	1	1	0	0	0	1	1	0	9	0	0	15	1	0	0	0	0	0	.071	.133	.071	.205	-1	-2.5	.108	-48	-2.5
23	Mike Davis M. Davis	21	1980	OAK	51	95	11	20	2	1	1	8	7	0	14	2	1	107	27	4	4	1	0	2	.211	.262	.284	.546	6	-5.7	.251	55	-5.7
24	Richard Dotson R. Dotson	21	1980	CWS	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
25	Bill Gullickson B. Gullickson	21	1980	MON	24	40	2	7	1	0	0	0	2	0	11	0	0	52	8	1	10	0	0	0	.175	.214	.200	.414	1	-5	.195	14	-5