who has the most shutouts by a pitcher since 1920

Since 1920, Warren Spahn has pitched the most shutouts, with 63 shutouts.

Interpreted as:

Who has the most regular-season shutouts by a pitcher since 1920?

	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	ERA-	FIP	FIP-	H/9	PRAA
1	Warren Spahn W. Spahn	63	750	363	245	.597	665	3.09	2,583	382	28	5243.2	4,830	1,798	2,016	434	1,434	42	67	60	21,547	81	4.43	2.46	1.80	0.74	12.0	6.7	1.19	.258	3.46	84	3.44	94	8.29	124.4
2	Tom Seaver T. Seaver	61	656	311	205	.603	647	2.86	3,640	231	1	4783.0	3,971	1,521	1,674	380	1,390	76	6	116	19,369	126	6.85	2.62	2.62	0.72	18.8	7.2	1.12	.259	3.15	79	3.03	85	7.47	286.1
3	Nolan Ryan N. Ryan	61	807	324	292	.526	773	3.19	5,714	222	3	5386.0	3,923	1,911	2,178	321	2,795	158	13	78	22,575	277	9.55	4.67	2.04	0.54	25.3	12.4	1.25	.265	3.64	90	2.96	83	6.56	370.2
4	Bert Blyleven B. Blyleven	60	692	287	250	.534	685	3.31	3,701	242	0	4970.0	4,632	1,830	2,029	430	1,322	155	3	71	20,491	114	6.70	2.39	2.80	0.78	18.1	6.5	1.20	.282	3.67	85	3.18	82	8.39	368.6
5	Don Sutton D. Sutton	58	774	324	256	.559	756	3.26	3,574	178	5	5282.1	4,692	1,914	2,104	472	1,343	82	12	102	21,631	112	6.09	2.29	2.66	0.80	16.5	6.2	1.14	.261	3.58	92	3.23	90	7.99	181.2
6	Bob Gibson B. Gibson	56	528	251	174	.591	482	2.91	3,117	255	6	3884.1	3,279	1,258	1,420	257	1,336	102	21	118	16,068	108	7.22	3.10	2.33	0.60	19.4	8.3	1.19	.268	3.29	78	2.89	81	7.60	290.5
7	Steve Carlton S. Carlton	55	741	329	244	.574	709	3.22	4,136	254	2	5217.2	4,672	1,864	2,130	414	1,833	53	13	150	21,683	183	7.13	3.16	2.26	0.71	19.1	8.5	1.25	.279	3.67	87	3.14	86	8.06	271.5
8	Jim Palmer J. Palmer	53	558	268	152	.638	521	2.86	2,212	211	4	3948.0	3,349	1,253	1,395	303	1,311	38	15	37	16,114	85	5.04	2.99	1.69	0.69	13.7	8.1	1.18	.249	3.18	80	3.50	95	7.63	83.2
9	Gaylord Perry G. Perry	53	777	314	265	.542	690	3.11	3,534	303	10	5350.0	4,938	1,846	2,128	399	1,379	108	33	164	21,953	160	5.95	2.32	2.56	0.67	16.1	6.3	1.18	.275	3.58	85	3.06	85	8.31	312.9
10	Juan Marichal J. Marichal	52	471	243	142	.631	457	2.89	2,303	244	2	3507.0	3,153	1,126	1,329	320	709	40	11	82	14,236	51	5.91	1.82	3.25	0.82	16.2	5.0	1.10	.261	3.41	81	3.04	88	8.09	154.8
11	Fergie Jenkins F. Jenkins	49	664	284	226	.557	594	3.34	3,192	267	7	4500.2	4,142	1,669	1,853	484	997	84	37	116	18,400	62	6.38	1.99	3.20	0.97	17.3	5.4	1.14	.268	3.71	87	3.27	88	8.28	222.9
12	Luis Tiant L. Tiant	49	573	229	172	.571	484	3.30	2,416	187	15	3486.1	3,075	1,280	1,400	346	1,104	49	51	53	14,365	27	6.24	2.85	2.19	0.89	16.8	7.7	1.20	.261	3.61	87	3.46	92	7.94	117.1
13	Don Drysdale D. Drysdale	49	518	209	166	.557	465	2.95	2,486	167	6	3432.0	3,084	1,124	1,292	280	855	154	34	123	14,097	82	6.52	2.24	2.91	0.73	17.6	6.1	1.15	.272	3.39	83	3.02	88	8.09	162.2
14	Early Wynn E. Wynn	49	691	300	244	.551	611	3.54	2,334	289	16	4564.0	4,291	1,796	2,037	338	1,775	64	67	36	19,408	51	4.60	3.50	1.31	0.67	12.0	9.1	1.33	.265	4.02	94	3.64	97	8.46	56.4
15	Roger Clemens R. Clemens	46	709	354	184	.658	707	3.12	4,672	118	0	4916.2	4,185	1,707	1,885	363	1,580	159	0	63	20,240	143	8.55	2.89	2.96	0.66	23.1	7.8	1.17	.284	3.45	70	3.08	71	7.66	680.4
16	Tommy John T. John	46	760	288	231	.555	700	3.34	2,245	162	3	4710.1	4,783	1,749	2,017	302	1,259	98	22	102	19,692	187	4.29	2.41	1.78	0.58	11.4	6.4	1.28	.284	3.85	90	3.37	89	9.14	208.3
17	Phil Niekro P. Niekro	45	864	318	274	.537	716	3.35	3,342	245	29	5404.0	5,044	2,012	2,337	482	1,809	123	83	86	22,677	226	5.57	3.01	1.85	0.80	14.7	8.0	1.27	.270	3.89	87	3.61	95	8.40	116.1
18	Whitey Ford W. Ford	45	498	236	106	.690	438	2.75	1,956	156	11	3170.1	2,766	967	1,107	228	1,086	28	35	44	13,036	75	5.55	3.08	1.80	0.65	15.0	8.3	1.22	.261	3.14	75	3.26	88	7.85	156.9
19	Robin Roberts R. Roberts	45	676	286	245	.539	609	3.41	2,357	305	25	4688.2	4,582	1,774	1,962	505	902	54	49	69	19,174	33	4.52	1.73	2.61	0.97	12.3	4.7	1.17	.265	3.77	89	3.50	91	8.80	179.6
20	Red Ruffing R. Ruffing	45	624	273	225	.548	538	3.80	1,987	335	18	4344.0	4,284	1,833	2,115	254	1,541	58	69		18,546	46	4.12	3.19	1.29	0.53	10.7	8.3	1.34	.274	4.38	91	3.93	95	8.88	82.3
21	Bob Feller B. Feller	44	570	266	162	.621	484	3.25	2,581	279	22	3827.0	3,271	1,384	1,557	224	1,764	60	52	6	16,180	69	6.07	4.15	1.46	0.53	16.0	10.9	1.32	.264	3.66	82	3.48	89	7.69	184.6
22	Milt Pappas M. Pappas	43	520	209	164	.560	465	3.40	1,728	129	4	3186.0	3,046	1,203	1,331	298	858	72	33	89	13,198	97	4.88	2.42	2.01	0.84	13.1	6.5	1.23	.268	3.76	92	3.53	96	8.60	50.2
23	Catfish Hunter C. Hunter	42	500	224	166	.574	476	3.26	2,012	181	1	3449.1	2,958	1,248	1,380	374	954	49	6	57	14,032	49	5.25	2.49	2.11	0.98	14.3	6.8	1.13	.243	3.60	95	3.66	103	7.72	-51.5
24	Bucky Walters B. Walters	42	428	198	160	.553	398	3.30	1,107	242	4	3104.2	2,990	1,139	1,343	155	1,121	51	18		13,140	63	3.21	3.25	0.99	0.45	8.4	8.5	1.32	.265	3.89	87	3.82	99	8.67	15.3
25	Mickey Lolich M. Lolich	41	586	217	191	.532	496	3.44	2,832	195	10	3638.1	3,366	1,390	1,537	347	1,099	92	40	67	15,140	124	7.01	2.72	2.58	0.86	18.7	7.3	1.23	.280	3.80	96	3.19	87	8.33	188.5