Jim Derrington is the youngest in a start. He was 16 years and 306 days old versus the Kansas City Athletics on September 30, 1956.

Interpreted as:

youngest player to ever regular-season start

	NAME	AGE	GS	DATE	TM		OPP	DEC	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP
1	Jim Derrington J. Derrington	16-306	1	9/30/1956	CWS	@	KCA	L	7.50	3	0	0	0	6.0	9	5	6	2	6	0	0	0	31	0
2	Roger McKee R. McKee	17-017	1	10/3/1943	PHN	@	PIT	W	3.00	1	1	0	0	9.0	5	3	3	0	5	0	0		35	2
3	Jim Derrington J. Derrington	17-213	1	6/30/1957	CWS	@	WSH			0	0	0	0	0.0	2	5	5	0	3	0	0	0	5	0
4	Jim Derrington J. Derrington	17-254	1	8/10/1957	CWS	vs	DET		2.57	3	0	0	0	7.0	3	2	2	1	3	0	0	0	26	0
5	Dave Skeels D. Skeels	17-259	1	9/14/1910	DET	vs	CLE			2	0	0	0	6.0	9		8	0	4	1	0		32	1
6	Jim Derrington J. Derrington	17-261	1	8/17/1957	CWS	@	DET		13.50	0	0	0	0	2.0	4	3	3	1	1	0	0	0	11	0
7	Jim Derrington J. Derrington	17-265	1	8/21/1957	CWS	vs	WSH		11.57	0	0	0	0	2.1	3	3	3	2	4	0	0	0	13	0
8	Bob Feller B. Feller	17-294	1	8/23/1936	CLE	vs	SLA	W	1.00	15	1	0	0	9.0	6	1	1	0	4	0	0		37	1
9	Jay Dahl J. Dahl	17-295	1	9/27/1963	HOU	vs	NYM	L	16.88	0	0	0	0	2.2	7	5	7	0	0	0	0	0	16	1
10	Jim Derrington J. Derrington	17-300	1	9/25/1957	CWS	vs	DET	L	11.57	1	0	0	0	2.1	3	3	3	0	3	0	0	0	13	0
11	Bob Feller B. Feller	17-301	1	8/30/1936	CLE	@	BSA	L	7.20	5	0	0	0	5.0	6	4	4	0	3	0	0		24	1
12	Bob Feller B. Feller	17-305	1	9/3/1936	CLE	@	NYY	L	45.00	2	0	0	0	1.0	3	5	5	0	3	0	0		9	0
13	Bob Feller B. Feller	17-309	1	9/7/1936	CLE	vs	SLA	W	1.00	10	1	0	0	9.0	7	1	1	0	3	0	0		35	1
14	Bob Feller B. Feller	17-315	1	9/13/1936	CLE	vs	PHA	W	2.00	17	1	0	0	9.0	2	2	2	0	9	1	0		39	1
15	Bob Feller B. Feller	17-320	1	9/18/1936	CLE	@	DET	L	3.00	5	0	0	0	6.0	7	2	6	1	4	0	0		27	0
16	Bob Feller B. Feller	17-325	1	9/23/1936	CLE	vs	CWS	W	1.00	10	1	0	0	9.0	7	1	2	0	6	0	0		37	1
17	Bob Feller B. Feller	17-329	1	9/27/1936	CLE	vs	DET	W	0.00	6	1	0	0	6.0	3	0	1	0	7	1	0		28	0
18	Mike McCormick M. McCormick	17-342	1	9/5/1956	NYG	@	PHI		10.80	0	0	0	0	1.2	2	2	2	0	5	0	0	0	12	0
19	Ron Moeller R. Moeller	17-352	1	9/29/1956	BAL	@	WSH	L	7.20	0	0	0	0	5.0	9	4	5	0	2	0	0	0	27	0
20	Mike McCormick M. McCormick	17-352	1	9/15/1956	NYG	vs	STL	L	11.25	4	0	0	0	4.0	5	5	5	1	5	0	0	0	21	0
21	Larry Dierker L. Dierker	18	1	9/22/1964	HOU	vs	SFG	L	6.75	3	0	0	0	2.2	5	2	4	1	3	0	0	0	16	2
22	Lefty Weinert L. Weinert	18-023	1	5/14/1920	PHN	@	CIN		5.40	3	0	0	0	5.0	4	3	3	0	3	0	0		22	1
23	Lefty Weinert L. Weinert	18-031	1	5/22/1920	PHN	@	CHC	L	54.00	0	0	0	0	0.1	2	2	2	0	2	0	0		5	0
24	Joey Jay J. Jay	18-036	1	9/20/1953	MIL	vs	CIN	W	0.00	4	1	1	0	7.0	3	0	0	0	4	0	0	0	26	1
25	Lew Krausse L. Krausse	18-052	1	6/16/1961	KCA	vs	LAA	W	0.00	6	1	1	0	9.0	3	0	0	0	5	0	0	0	32	0