Walter Johnson has the most career shutouts by a pitcher younger than 25, with 31 shutouts.

Interpreted as:

most regular-season shutouts by a player before age 25

	NAME	SHO	G	W	L	W%	GS	ERA	SO	CG	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	Walter Johnson W. Johnson	31	211	110	81	.576	182	0.08	1,156	158	6	1614.2	1,256		487	12	360	66	28			74	6.44	2.01	3.21	0.07		5.7	1.00	.261	2.71	7.00
2	Joe Wood J. Wood	25	193	102	51	.667	141	0.59	933	111	6	1257.2	992		453	9	369	51	45			40	6.68	2.64	2.53	0.06		7.3	1.08	.266	3.24	7.10
3	Bert Blyleven B. Blyleven	24	216	95	85	.528	213	2.78	1,327	97	0	1611.1	1,416	498	566	114	403	39	2	23	6,534	31	7.41	2.25	3.29	0.64	20.3	6.2	1.13	.280	3.16	7.91
4	Fernando Valenzuela F. Valenzuela	23	176	78	57	.578	166	2.89	1,032	64	1	1285.1	1,069	413	485	68	455	9	4	35	5,261	41	7.23	3.19	2.27	0.48	19.6	8.6	1.19	.271	3.40	7.49
5	Frank Tanana F. Tanana	21	159	77	54	.588	154	2.72	1,010	79	0	1212.0	1,034	366	407	105	322	39	3	22	4,927	30	7.50	2.39	3.14	0.78	20.5	6.5	1.12	.269	3.02	7.68
6	Dwight Gooden D. Gooden	19	177	100	39	.719	175	2.64	1,168	52	1	1291.0	1,053	379	423	65	379	18	1	17	5,215	26	8.14	2.64	3.08	0.45	22.4	7.3	1.11	.276	2.95	7.34
7	Dean Chance D. Chance	19	196	65	55	.542	142	2.82	729	40	16	1056.0	920	331	390	50	384	30	31	37	4,389	26	6.21	3.27	1.90	0.43	16.6	8.7	1.23	.272	3.32	7.84
8	Hal Newhouser H. Newhouser	19	231	94	71	.570	173	2.86	895	94	10	1376.1	1,165	438	537	38	673	6	43		5,852	29	5.85	4.40	1.33	0.25	15.3	11.5	1.34	.266	3.51	7.62
9	Vida Blue V. Blue	18	144	65	37	.637	134	2.85	743	52	1	990.2	760	314	360	83	328	11	1	13	3,980	34	6.75	2.98	2.27	0.75	18.7	8.2	1.10	.240	3.27	6.90
10	Dutch Leonard D. Leonard	18	159	67	41	.620	110	2.03	583	59	10	949.2	764	214	288	12	291	38	40		3,808	18	5.53	2.76	2.00	0.11	15.3	7.6	1.11	.261	2.73	7.24
11	Denny McLain D. McLain	17	171	90	48	.652	164	3.11	917	70	1	1176.2	933	406	449	151	355	15	2	9	4,737	17	7.01	2.72	2.58	1.15	19.4	7.5	1.09	.237	3.43	7.14
12	Babe Ruth B. Ruth	17	158	89	46	.659	143	2.19	495	105	4	1190.1	934		376	9	433	29	11			27	3.74	3.27	1.14	0.07		9.0	1.15	.239	2.84	7.06
13	Milt Pappas M. Pappas	16	198	82	60	.577	167	3.41	678	60	4	1186.0	1,046	450	495	100	437	28	21	22	4,936	54	5.15	3.32	1.55	0.76	13.7	8.9	1.25	.256	3.76	7.94
14	Bob Feller B. Feller	16	205	107	54	.665	175	3.18	1,233	117	10	1448.1	1,149	512	569	58	815	26	24		6,187	46	7.66	5.06	1.51	0.36	19.9	13.2	1.36	.269	3.54	7.14
15	Don Drysdale D. Drysdale	15	211	73	60	.549	163	3.28	927	52	4	1201.2	1,084	438	486	115	383	67	30	36	5,033	29	6.94	2.87	2.42	0.86	18.4	7.6	1.22	.274	3.64	8.12
16	Billy Hoeft B. Hoeft	15	171	54	57	.486	128	4.10	586	55	7	983.1	1,004	448	483	102	365	25	18		4,252	20	5.36	3.34	1.61	0.93	13.8	8.6	1.39	.284	4.42	9.19
17	Bullet Joe Bush B. Joe Bush	15	180	63	75	.457	122	3.07	560	69	8	1080.1	967		484	15	485	23	45			40	4.67	4.04	1.15	0.12		10.5	1.34	.268	4.03	8.06
18	Jon Matlack J. Matlack	14	109	42	44	.488	106	2.71	593	36	0	788.1	677	237	272	40	261	9	2	39	3,243	20	6.77	2.98	2.27	0.46	18.3	8.0	1.19	.272	3.11	7.73
19	Robin Roberts R. Roberts	14	146	63	49	.563	129	3.19	456	63	7	986.0	938	349	390	73	276	14	13		4,076	9	4.16	2.52	1.65	0.67	11.2	6.8	1.23	.266	3.56	8.56
20	Dizzy Dean D. Dean	14	145	69	40	.633	101	2.97	590	67	14	901.0	850	297	346	37	242	16	36		3,729	6	5.89	2.42	2.44	0.37	15.8	6.5	1.21	.286	3.46	8.49
21	Dennis Eckersley D. Eckersley	13	171	77	50	.606	155	3.13	855	60	3	1148.1	1,008	399	431	119	352	32	8	33	4,760	17	6.70	2.76	2.43	0.93	18.0	7.4	1.18	.261	3.38	7.90
22	Don Gullett D. Gullett	13	213	80	41	.661	136	3.04	713	31	10	1061.0	903	358	394	90	364	10	34	37	4,373	24	6.05	3.09	1.96	0.76	16.3	8.3	1.19	.254	3.34	7.66
23	Catfish Hunter C. Hunter	13	212	73	79	.480	190	3.53	882	50	1	1319.1	1,170	518	574	151	424	24	4	29	5,471	22	6.02	2.89	2.08	1.03	16.1	7.7	1.21	.255	3.92	7.98
24	Tommy John T. John	13	143	44	42	.512	114	2.76	495	30	2	759.1	654	233	280	50	216	16	6	23	3,092	30	5.87	2.56	2.29	0.59	16.0	7.0	1.15	.261	3.32	7.75
25	Curt Simmons C. Simmons	13	168	63	55	.534	130	3.50	639	61	2	1024.0	921	398	468	63	434	9	21		4,380	14	5.62	3.81	1.47	0.55	14.6	9.9	1.32	.265	4.11	8.09