how many pitchers have won back to back cy youngs

Pitchers won 1,231 times in 1956.

Interpreted as:

How many pitchers have won back to back cy youngs in a regular season?

	POSITION	W	CY	SEASON	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	ERA-	FIP	FIP-	H/9	PRAA
1	Pitcher	1,231	1	1956	1,231	.500	5,920	2,478	3.97	11,494	758	127	365	22065.2	21,634	9,724	11,021	2,292	8,989	478	1,713	783	95,117	491	4.69	3.67	1.28	0.93	12.1	9.5	1.39	.269	4.50	100	3.96	100	8.82	5.5
2	Pitcher	1,230	1	1957	1,230	.500	6,012	2,470	3.83	11,963	710	139	391	22343.1	21,864	9,516	10,636	2,202	8,175	511	1,759	740	95,391	480	4.82	3.29	1.46	0.89	12.5	8.6	1.34	.271	4.28	100	3.83	100	8.81	-4.5
3	Pitcher	1,231	1	1958	1,231	.500	6,022	2,470	3.86	12,223	743	132	410	22042.2	21,612	9,451	10,571	2,241	8,121	499	1,724	680	94,113	525	4.99	3.32	1.51	0.91	13.0	8.6	1.35	.273	4.32	100	3.86	100	8.82	-9.7
4	Pitcher	1,234	1	1959	1,233	.500	5,920	2,476	3.90	12,606	742	158	387	22094.1	21,631	9,583	10,848	2,249	8,179	496	1,730	707	94,695	556	5.13	3.33	1.54	0.92	13.3	8.6	1.35	.272	4.42	100	3.90	100	8.81	-0.9
5	Pitcher	1,232	1	1960	1,232	.500	6,064	2,472	3.82	12,817	665	140	430	22202.1	21,433	9,416	10,663	2,127	8,384	488	1,806	730	94,772	604	5.20	3.40	1.53	0.86	13.5	8.8	1.34	.272	4.32	100	3.82	100	8.69	-3.3
6	Pitcher	1,423	1	1961	1,423	.500	6,986	2,860	4.03	14,952	745	154	501	25452.0	25,062	11,387	12,939	2,730	9,896	573	2,114	732	109,563	780	5.29	3.50	1.51	0.97	13.6	9.0	1.37	.274	4.58	99	4.03	99	8.86	82.8
7	Pitcher	1,618	1	1962	1,618	.500	8,281	3,242	3.96	17,567	844	168	616	29005.0	28,521	12,748	14,461	3,001	10,936	709	2,398	818	124,551	949	5.45	3.39	1.61	0.93	14.1	8.8	1.36	.276	4.49	100	3.96	100	8.85	-53.5
8	Pitcher	1,618	1	1963	1,618	.500	8,046	3,238	3.46	18,773	865	234	588	29105.1	27,043	11,186	12,780	2,704	9,591	714	2,373	933	122,356	914	5.81	2.97	1.96	0.84	15.3	7.8	1.26	.269	3.95	100	3.46	100	8.36	-33.5
9	Pitcher	1,619	1	1964	1,616	.500	8,366	3,251	3.58	19,192	797	221	669	29106.2	27,635	11,582	13,111	2,757	9,611	693	2,452	1,014	122,859	977	5.93	2.97	2.00	0.85	15.6	7.8	1.28	.275	4.05	100	3.58	100	8.54	-21.1
10	Pitcher	1,619	1	1965	1,619	.500	8,597	3,246	3.50	19,279	739	191	674	29179.1	26,948	11,344	12,945	2,688	10,033	720	2,506	1,130	122,748	1,046	5.95	3.09	1.92	0.83	15.7	8.2	1.27	.269	3.99	100	3.50	100	8.31	17.9
11	Pitcher	1,613	1	1966	1,613	.500	8,498	3,230	3.52	18,796	736	194	665	29037.0	27,196	11,358	12,895	2,743	9,325	682	2,490	1,088	121,651	1,039	5.83	2.89	2.02	0.85	15.5	7.7	1.26	.271	4.00	100	3.52	100	8.43	2.1
12	Pitcher	1,617	1	1967	1,617	.500	8,428	3,240	3.30	19,413	782	226	649	29181.1	26,461	10,710	12,209	2,298	9,665	751	2,456	1,295	121,836	985	5.99	2.98	2.01	0.71	15.9	7.9	1.24	.269	3.77	100	3.30	100	8.16	-15.9
13	Pitcher	1,618	1	1968	1,619	.500	8,034	3,249	2.98	19,135	897	279	601	29219.1	25,702	9,687	11,104	1,995	9,152	777	2,349	1,223	120,767	1,006	5.89	2.82	2.09	0.61	15.8	7.6	1.19	.264	3.42	100	2.98	100	7.92	-13.4
14	Pitcher	1,943	1	1969	1,943	.500	10,114	3,892	3.61	22,473	982	242	745	34890.0	32,578	14,005	15,848	3,118	13,427	882	2,909	1,436	148,185	1,284	5.80	3.46	1.67	0.80	15.2	9.1	1.32	.272	4.09	100	3.61	100	8.40	0.1
15	Pitcher	1,943	1	1970	1,943	.500	10,356	3,888	3.89	22,374	852	188	878	34858.2	33,555	15,051	16,880	3,429	13,727	825	3,036	1,464	149,324	1,249	5.78	3.54	1.63	0.89	15.0	9.2	1.36	.276	4.36	100	3.88	100	8.66	-34.1
16	Pitcher	1,936	1	1971	1,936	.500	9,661	3,876	3.47	20,956	1,082	265	689	34767.0	32,547	13,400	15,073	2,863	12,536	821	2,794	1,396	146,700	1,115	5.42	3.25	1.67	0.74	14.3	8.5	1.30	.271	3.90	100	3.46	100	8.43	-4.8
17	Pitcher	1,858	1	1972	1,858	.500	9,126	3,718	3.26	20,718	1,009	295	733	33449.2	30,429	12,131	13,704	2,534	11,727	751	2,708	1,378	139,951	1,069	5.57	3.16	1.77	0.68	14.8	8.4	1.26	.268	3.69	100	3.26	100	8.19	-5.3
18	Pitcher	1,942	1	1973	1,942	.500	9,207	3,886	3.75	20,354	1,061	236	819	34874.2	34,007	14,514	16,372	3,102	13,094	755	2,823	1,357	148,768	1,197	5.25	3.38	1.55	0.80	13.7	8.8	1.35	.277	4.23	100	3.74	100	8.78	-0.7
19	Pitcher	1,940	1	1974	1,940	.500	9,330	3,890	3.63	19,495	1,089	227	517	34942.1	33,969	14,083	16,046	2,649	12,963	774	2,801	1,353	148,855	1,086	5.02	3.34	1.50	0.68	13.1	8.7	1.34	.277	4.13	100	3.62	100	8.75	-23.9
20	Pitcher	1,933	1	1975	1,933	.500	9,272	3,868	3.71	19,280	1,052	223	669	34724.0	33,863	14,316	16,295	2,699	13,402	761	2,816	1,338	148,621	1,158	5.00	3.47	1.44	0.70	13.0	9.0	1.36	.277	4.22	100	3.70	100	8.78	-22.1
21	Pitcher	1,939	1	1976	1,939	.500	9,364	3,878	3.51	18,745	1,039	261	683	34925.2	33,598	13,637	15,492	2,235	12,391	684	2,839	1,156	147,598	1,047	4.83	3.19	1.51	0.58	12.7	8.4	1.32	.276	3.99	100	3.51	100	8.66	-18.5
22	Pitcher	2,103	1	1977	2,103	.500	10,618	4,206	4.00	21,719	907	176	845	37734.2	38,028	16,761	18,794	3,640	13,754	790	3,296	1,297	161,520	1,165	5.18	3.28	1.58	0.87	13.4	8.5	1.37	.283	4.48	100	3.99	100	9.07	21
23	Pitcher	2,102	1	1978	2,102	.500	10,092	4,204	3.69	20,057	1,034	238	804	37492.2	36,505	15,356	17,246	2,955	13,561	771	3,169	1,338	159,171	1,051	4.81	3.26	1.48	0.71	12.6	8.5	1.34	.275	4.14	100	3.68	100	8.76	40.7
24	Pitcher	2,096	1	1979	2,096	.500	10,565	4,196	4.00	20,031	913	175	840	37465.2	37,898	16,662	18,706	3,432	13,599	754	3,277	1,366	160,325	1,146	4.81	3.27	1.47	0.82	12.5	8.5	1.37	.281	4.49	100	3.99	100	9.10	4.9
25	Pitcher	2,101	1	1980	2,101	.500	10,791	4,210	3.84	20,211	856	189	902	37857.0	38,136	16,157	18,048	3,086	13,187	657	3,350	1,435	161,186	1,031	4.80	3.14	1.53	0.73	12.5	8.2	1.36	.283	4.29	100	3.83	100	9.07	21