most wins by a pitcher before the age of 20

Bob Feller has won the most career games by a pitcher younger than 20, with 31 wins.

Interpreted as:

most regular-season wins by a pitcher before the age of 20

	NAME	W	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Bob Feller B. Feller	31	21	.596	79	63	3.78	466	34	2	3	488.1	393	205	233	18	361	13	12		2,175	18	8.59	6.65	1.29	0.33	21.4	16.6	1.54	.285	4.29	7.24
2	Wally Bunker W. Bunker	19	6	.760	30	30	2.89	97	12	1	0	218.0	171	70	78	18	65	3	0	5	875	3	4.00	2.68	1.49	0.74	11.1	7.4	1.08	.221	3.22	7.06
3	Dwight Gooden D. Gooden	17	9	.654	31	31	2.60	276	7	3	0	218.0	161	63	72	7	73	2	0	2	879	3	11.39	3.01	3.78	0.29	31.4	8.3	1.07	.296	2.97	6.65
4	Larry Dierker L. Dierker	16	16	.500	56	46	3.29	214	8	2	0	328.1	304	120	141	33	84	4	4	6	1,370	13	5.87	2.30	2.55	0.90	15.6	6.1	1.18	.262	3.86	8.33
5	Pete Schneider P. Schneider	15	23	.395	61	38	2.59	137	20	3	3	333.1	309		144	2	133	14	18			1	3.70	3.59	1.03	0.05		9.4	1.33	.273	3.89	8.34
6	Gary Nolan G. Nolan	14	8	.636	33	32	2.58	206	8	5	0	226.2	193	65	73	18	62	5	1	7	932	3	8.18	2.46	3.32	0.71	22.1	6.7	1.13	.273	2.90	7.66
7	Mike McCormick M. McCormick	14	10	.583	69	35	4.58	138	9	2	1	259.2	278	132	147	27	101	6	13	8	1,130	10	4.78	3.50	1.37	0.94	12.2	8.9	1.46	.293	5.09	9.64
8	Milt Pappas M. Pappas	13	10	.565	41	24	4.06	94	4	0	0	166.1	162	75	82	8	68	2	9	2	708	10	5.09	3.68	1.38	0.43	13.3	9.6	1.38	.287	4.44	8.77
9	Hal Newhouser H. Newhouser	12	11	.522	34	26	4.64	116	10	0	0	176.1	184	91	104	13	112	2	3		808	5	5.92	5.72	1.04	0.66	14.4	13.9	1.68	.303	5.31	9.39
10	Joe Wood J. Wood	12	8	.600	30	21		107	14	5	0	183.1	135		63	1	57	9	6		727	5	5.25	2.80	1.88	0.05	14.7	7.8	1.05	.242	3.09	6.63
11	Bert Blyleven B. Blyleven	10	9	.526	27	25	3.18	135	5	1	0	164.0	143	58	66	17	47	2	1	6	675	2	7.41	2.58	2.87	0.93	20.0	7.0	1.16	.266	3.62	7.85
12	Rube Bressler R. Bressler	10	4	.714	29	10	1.77	96	8	1	2	147.2	112	29	37	1	56	4	15		582	3	5.85	3.41	1.71	0.06	16.5	9.6	1.14	.261	2.26	6.83
13	Ray Sadecki R. Sadecki	9	9	.500	26	26	3.78	95	7	1	0	157.1	148	66	76	15	86	1	0	1	689	8	5.43	4.92	1.10	0.86	13.8	12.5	1.49	.270	4.35	8.47
14	Curt Simmons C. Simmons	9	15	.375	38	29	4.74	119	9	0	0	214.2	213	113	131	9	131	2	5		973	6	4.99	5.49	0.91	0.38	12.2	13.5	1.60	.287	5.49	8.93
15	Frank Shellenback F. Shellenback	9	12	.429	28	21	2.65	46	10	2	2	183.2	180		77	1	78	6	6		783	0	2.25	3.82	0.59	0.05	5.9	10.0	1.40	.275	3.77	8.82
16	Catfish Hunter C. Hunter	8	8	.500	32	20	4.26	83	3	2	0	133.0	124	63	68	21	46	2	2	5	567	2	5.62	3.11	1.80	1.42	14.6	8.1	1.28	.248	4.60	8.39
17	David Clyde D. Clyde	7	17	.292	46	39	4.66	126	4	0	0	210.1	235	109	127	22	101	8	4	1	938	13	5.39	4.32	1.25	0.94	13.4	10.8	1.60	.313	5.43	10.06
18	Von McDaniel V. McDaniel	7	5	.583	19	14	3.45	45	4	2	0	88.2	76	34	40	7	36	1	2	2	372	4	4.57	3.65	1.25	0.71	12.1	9.7	1.26	.244	4.06	7.71
19	Joe Moeller J. Moeller	6	5	.545	19	15	5.25	46	1	0	1	85.2	87	50	55	10	58	0	2	1	389	9	4.83	6.09	0.79	1.05	11.8	14.9	1.69	.280	5.78	9.14
20	Jack Bentley J. Bentley	6	7	.462	33	12	2.20	58	3	2	5	135.0	115	33	49	3	55	4	15		541	4	3.87	3.67	1.05	0.20	10.7	10.2	1.26	.266	3.27	7.67
21	Don Gullett D. Gullett	5	2	.714	44	2	2.43	76	0	0	6	77.2	54	21	23	4	44	0	15	6	323	6	8.81	5.10	1.73	0.46	23.5	13.6	1.26	.251	2.67	6.26
22	Jim Palmer J. Palmer	5	4	.556	27	6	3.72	75	0	0	1	92.0	75	38	49	6	56	2	7	1	395	4	7.34	5.48	1.34	0.59	19.0	14.2	1.42	.270	4.79	7.34
23	Rick Wise R. Wise	5	3	.625	25	8	4.04	39	0	0	0	69.0	78	31	41	7	25	3	2	2	313	3	5.09	3.26	1.56	0.91	12.5	8.0	1.49	.297	5.35	10.17
24	Jim Waugh J. Waugh	5	11	.313	46	18	6.43	41	2	0	0	142.2	169	102	113	25	88	2	9		674	3	2.59	5.55	0.47	1.58	6.1	13.1	1.80	.278	7.13	10.66
25	Ralph Branca R. Branca	5	8	.385	37	16	4.20	86	7	0	2	154.1	119	72	80	6	111	5	11		690	10	5.02	6.47	0.77	0.35	12.5	16.1	1.49	.234	4.67	6.94