what pitcher had the most shutouts in the 1980s

Between the 1980 and 1989 seasons, Dave Stieb and Fernando Valenzuela were tied for the most shutouts, with 27 shutouts.

Interpreted as:

What pitcher had the most regular-season shutouts in the 1980s?

	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	Dave Stieb D. Stieb	27	339	140	109	.562	331	3.32	1,380	92	1	2328.2	2,019	859	954	183	825	104	4	29	9,654	39	5.33	3.19	1.67	0.71	14.3	8.5	1.22	.256	3.69	80	3.77	93	7.80	77.5
2	Fernando Valenzuela F. Valenzuela	27	298	128	103	.554	287	3.19	1,644	102	2	2144.2	1,876	760	869	133	838	16	5	54	8,957	81	6.90	3.52	1.96	0.56	18.4	9.4	1.27	.276	3.65	91	3.21	90	7.87	84
3	Orel Hershiser O. Hershiser	23	231	98	64	.605	191	2.69	1,011	58	5	1457.0	1,240	435	508	75	434	31	18	53	5,957	51	6.25	2.68	2.33	0.46	17.0	7.3	1.15	.264	3.14	76	3.00	84	7.66	94.8
4	Bob Welch B. Welch	22	313	137	93	.596	311	3.21	1,457	47	0	2082.1	1,885	743	821	155	666	49	0	40	8,655	43	6.30	2.88	2.19	0.67	16.8	7.7	1.23	.273	3.55	90	3.34	92	8.15	63.4
5	Roger Clemens R. Clemens	21	175	95	45	.679	174	3.06	1,215	58	0	1284.2	1,088	437	476	95	371	32	0	16	5,243	31	8.51	2.60	3.27	0.67	23.2	7.1	1.14	.281	3.33	73	2.79	69	7.62	178.3
6	Bert Blyleven B. Blyleven	21	291	123	103	.544	288	3.64	1,480	94	0	2078.1	1,984	841	919	212	557	73	1	26	8,623	44	6.41	2.41	2.66	0.92	17.2	6.5	1.22	.281	3.98	89	3.56	88	8.59	109.6
7	Bob Knepper B. Knepper	20	332	105	118	.471	306	3.70	1,068	50	1	2005.1	2,045	824	946	167	597	36	8	52	8,484	39	4.79	2.68	1.79	0.75	12.6	7.0	1.32	.284	4.25	107	3.70	107	9.18	-64.6
8	Jack Morris J. Morris	20	332	162	119	.577	332	3.66	1,629	133	0	2443.2	2,212	995	1,085	264	858	23	0	66	10,208	124	6.00	3.16	1.90	0.97	16.0	8.4	1.26	.262	4.00	92	3.89	94	8.15	66.7
9	Mike Scott M. Scott	20	295	114	90	.559	276	3.42	1,324	41	3	1803.2	1,594	685	761	140	537	31	13	43	7,436	37	6.61	2.68	2.47	0.70	17.8	7.2	1.18	.269	3.80	98	3.23	93	7.95	53.3
10	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	75	2.52	70	7.34	155.6
11	Geoff Zahn G. Zahn	18	161	66	60	.524	156	3.81	385	55	0	1062.2	1,135	450	518	91	287	7	2	16	4,463	15	3.26	2.43	1.34	0.77	8.6	6.4	1.34	.283	4.39	96	3.93	97	9.61	14.8
12	Scott McGregor S. McGregor	17	262	107	83	.563	247	4.13	668	62	0	1604.1	1,727	736	799	189	413	16	7	21	6,797	20	3.75	2.32	1.62	1.06	9.8	6.1	1.33	.279	4.48	104	4.23	104	9.69	-31.2
13	Jerry Reuss J. Reuss	17	300	105	83	.559	258	3.48	762	44	5	1688.0	1,724	652	755	123	379	23	23	51	7,035	33	4.06	2.02	2.01	0.66	10.8	5.4	1.25	.279	4.03	95	3.49	95	9.19	28.2
14	Mike Boddicker M. Boddicker	16	239	101	87	.537	228	3.70	1,037	57	0	1574.1	1,500	648	726	148	541	52	6	29	6,627	45	5.93	3.09	1.92	0.85	15.6	8.2	1.30	.279	4.15	91	3.79	93	8.58	51.1
15	Steve Rogers S. Rogers	16	169	72	58	.554	165	3.24	641	50	0	1199.0	1,121	431	475	62	367	18	1	36	4,961	29	4.81	2.75	1.75	0.47	12.9	7.4	1.24	.273	3.57	91	3.28	92	8.41	39.3
16	Bruce Hurst B. Hurst	15	270	103	84	.551	250	4.01	1,222	64	0	1703.2	1,783	759	831	189	545	24	5	31	7,254	38	6.46	2.88	2.24	1.00	16.8	7.5	1.37	.302	4.39	96	3.76	94	9.42	41.4
17	Nolan Ryan N. Ryan	15	314	122	104	.540	314	3.14	2,167	44	0	2094.0	1,603	730	835	128	894	53	0	34	8,704	123	9.31	3.84	2.42	0.55	24.9	10.3	1.19	.270	3.59	90	2.82	81	6.89	159.5
18	Rick Sutcliffe R. Sutcliffe	15	310	116	93	.555	260	3.87	1,285	59	6	1860.0	1,764	799	866	160	745	28	27	56	7,887	74	6.22	3.60	1.72	0.77	16.3	9.4	1.35	.283	4.19	99	3.74	96	8.54	34.8
19	John Tudor J. Tudor	15	250	104	66	.612	235	3.13	914	48	1	1622.2	1,518	564	629	144	436	27	5	27	6,665	18	5.07	2.42	2.10	0.80	13.7	6.5	1.20	.267	3.49	81	3.62	96	8.42	23.6
20	Joaquin Andujar J. Andujar	14	270	90	81	.526	219	3.60	772	45	4	1517.1	1,448	607	670	126	446	40	15	48	6,306	22	4.58	2.65	1.73	0.75	12.2	7.1	1.25	.269	3.97	100	3.75	104	8.59	-29.8
21	Bob Ojeda B. Ojeda	14	242	88	73	.547	210	3.65	822	37	1	1364.2	1,301	553	615	106	458	18	17	27	5,725	18	5.42	3.02	1.79	0.70	14.4	8.0	1.29	.277	4.06	94	3.59	95	8.58	27.7
22	Mark Langston M. Langston	13	200	86	76	.531	197	3.80	1,253	47	0	1374.1	1,206	580	653	146	668	26	1	16	5,866	39	8.21	4.37	1.88	0.96	21.4	11.4	1.36	.281	4.28	91	3.84	92	7.90	56
23	Steve Carlton S. Carlton	13	254	104	84	.553	240	3.48	1,453	54	1	1732.1	1,604	670	774	135	631	12	6	50	7,271	76	7.55	3.28	2.30	0.70	20.0	8.7	1.29	.291	4.02	92	3.18	85	8.33	100.4
24	Charlie Leibrandt C. Leibrandt	13	273	92	78	.541	229	3.78	723	40	2	1568.1	1,652	658	727	121	476	20	16	29	6,674	46	4.15	2.73	1.52	0.69	10.8	7.1	1.36	.287	4.17	94	3.78	97	9.48	23.7
25	Mark Gubicza M. Gubicza	12	199	84	67	.556	187	3.51	850	33	0	1313.1	1,207	512	563	74	502	32	2	16	5,532	65	5.82	3.44	1.69	0.51	15.4	9.1	1.30	.278	3.86	85	3.42	86	8.27	79