oldest pitcher to win 20 games in a season

Warren Spahn is the oldest with 20+ pitcher wins in a season. He was 42 years old in 1963.

Interpreted as:

oldest pitcher to win 20 or more games in a season

	NAME	AGE	W	SEASON	TM	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	Warren Spahn W. Spahn	42	23	1963	MIL	7	.767	33	33	2.60	102	22	7	0	259.2	241	75	85	23	49	0	0	4	1,037	4	3.54	1.70	2.08	0.80	9.8	4.7	1.12	.253	2.95	81	3.41	106	8.35	-6.4
2	Cy Young C. Young	41	21	1908	BOS	11	.656	36	33	1.26	150	30	3	2	299.0	230	42	68	1	37	1	3		1,116	4	4.52	1.11	4.05	0.03	13.4	3.3	0.89	.247	2.05	52	1.52	67	6.92	25.4
3	Jamie Moyer J. Moyer	40	21	2003	SEA	7	.750	33	33	3.27	129	1	0	0	215.0	199	78	83	19	66	8	0	3	897	0	5.40	2.76	1.95	0.80	14.4	7.4	1.23	.267	3.47	76	4.01	92	8.33	8.7
4	Phil Niekro P. Niekro	40	21	1979	ATL	20	.512	44	44	3.39	208	23	1	0	342.0	311	129	160	41	113	11	0	8	1,436	18	5.47	2.97	1.84	1.08	14.5	7.9	1.24	.254	4.21	84	4.15	101	8.18	0.1
5	Warren Spahn W. Spahn	40	21	1961	MIL	13	.618	38	34	3.02	115	21	4	0	262.2	236	88	96	24	64	4	3	1	1,064	4	3.94	2.19	1.80	0.82	10.8	6.0	1.14	.247	3.29	79	3.66	98	8.09	1.6
6	Grover Alexander G. Alexander	40	21	1927	SLN	10	.677	37	30	2.52	48	22	2	3	268.0	261	75	94	11	38	1	5		1,082	1	1.61	1.28	1.26	0.37	4.4	3.5	1.12	.254	3.16	64	3.64	91	8.76	10.6
7	Cy Young C. Young	40	21	1907	BSA	15	.583	43	37	1.99	147	33	6	2	343.1	286	76	101	3	51	7	5		1,308	6	3.85	1.34	2.88	0.08	11.2	3.9	0.98	.257	2.65	77	1.94	80	7.50	18.8
8	Mike Mussina M. Mussina	39	20	2008	NYY	9	.690	34	34	3.37	150	0	0	0	200.1	214	75	85	17	31	8	0	3	819	4	6.74	1.39	4.84	0.76	18.3	3.8	1.22	.321	3.82	78	3.31	77	9.61	22.3
9	Gaylord Perry G. Perry	39	21	1978	SDP	6	.778	37	37	2.73	154	5	2	0	260.2	241	79	96	9	66	2	0	8	1,055	4	5.32	2.28	2.33	0.31	14.6	6.3	1.18	.282	3.31	82	2.62	77	8.32	23.5
10	Warren Spahn W. Spahn	39	21	1960	MIL	10	.677	40	33	3.50	154	18	4	2	267.2	254	104	114	24	74	4	5	9	1,110	1	5.18	2.49	2.08	0.81	13.9	6.7	1.23	.269	3.83	100	3.42	101	8.54	-2.1
11	Early Wynn E. Wynn	39	22	1959	CWS	10	.688	37	37	3.17	179	14	5	0	255.2	202	90	106	20	119	9	0	5	1,076	5	6.30	4.19	1.50	0.70	16.6	11.1	1.26	.243	3.73	84	3.66	95	7.11	5.5
12	Eddie Plank E. Plank	39	21	1915	SLF	11	.656	42	31	2.08	147	23	6	3	268.1	212	62	75	1	54	3	10		1,028	4	4.93	1.81	2.72	0.03	14.3	5.3	0.99	.256	2.52	67	2.00	66	7.11	30.8
13	Randy Johnson R. Johnson	38	24	2002	ARI	5	.828	35	35	2.32	334	8	4	0	260.0	197	67	78	26	71	13	0	1	1,035	3	11.56	2.46	4.70	0.90	32.3	6.9	1.03	.289	2.70	54	2.65	61	6.82	47
14	Roger Clemens R. Clemens	38	20	2001	NYY	3	.870	33	33	3.51	213	0	0	0	220.1	205	86	94	19	72	5	0	1	918	14	8.70	2.94	2.96	0.78	23.2	7.8	1.26	.305	3.84	80	3.28	74	8.37	28.1
15	Jamie Moyer J. Moyer	38	20	2001	SEA	6	.769	33	33	3.43	119	1	0	0	209.2	187	80	84	24	44	10	0	4	851	1	5.11	1.89	2.70	1.03	14.0	5.2	1.10	.249	3.61	80	4.17	96	8.03	3.8
16	Warren Spahn W. Spahn	38	21	1959	MIL	15	.583	40	36	2.96	143	21	4	0	292.0	282	96	106	21	70	1	3	9	1,203	2	4.41	2.16	2.04	0.65	11.9	5.8	1.21	.270	3.27	82	3.23	92	8.69	8.7
17	Spud Chandler S. Chandler	38	20	1946	NYY	8	.714	34	32	2.10	138	20	6	2	257.1	200	60	71	7	90	1	2		1,028	3	4.83	3.15	1.53	0.24	13.4	8.8	1.13	.244	2.48	60	2.73	79	6.99	20.4
18	R.A. Dickey	37	20	2012	NYM	6	.769	34	33	2.73	230	5	3	0	233.2	192	71	78	24	54	9	1	2	927	4	8.86	2.08	4.26	0.92	24.8	5.8	1.05	.275	3.00	73	3.26	84	7.40	16.6
19	Curt Schilling C. Schilling	37	21	2004	BOS	6	.778	32	32	3.26	203	3	0	0	226.2	206	82	84	23	35	5	0	0	910	3	8.06	1.39	5.80	0.91	22.3	3.8	1.06	.284	3.34	69	3.10	71	8.18	33.1
20	Randy Johnson R. Johnson	37	21	2001	ARI	6	.778	35	34	2.49	372	3	2	0	249.2	181	69	74	19	71	18	1	2	994	8	13.41	2.56	5.24	0.68	37.4	7.1	1.01	.315	2.67	55	2.12	48	6.52	63.9
21	David Wells D. Wells	37	20	2000	TOR	8	.714	35	35	4.11	166	9	1	0	229.2	266	105	115	23	31	8	0	0	972	9	6.51	1.21	5.35	0.90	17.1	3.2	1.29	.327	4.51	82	3.49	72	10.42	34
22	Jack Morris J. Morris	37	21	1992	TOR	6	.778	34	34	4.04	132	6	1	0	240.2	222	108	114	18	80	10	0	2	1,005	9	4.94	2.99	1.65	0.67	13.1	8.0	1.25	.267	4.26	101	3.77	94	8.30	6.5
23	Steve Carlton S. Carlton	37	23	1982	PHI	11	.676	38	38	3.10	286	19	6	0	295.2	253	102	114	17	86	1	0	5	1,193	9	8.71	2.62	3.33	0.52	24.0	7.2	1.15	.294	3.47	85	2.40	67	7.70	38.3
24	Tommy John T. John	37	22	1980	NYY	9	.710	36	36	3.43	78	16	6	0	265.1	270	101	115	13	56	6	0	1	1,089	5	2.65	1.90	1.39	0.44	7.2	5.1	1.23	.275	3.90	88	3.49	88	9.16	14.6
25	Mike Cuellar M. Cuellar	37	22	1974	BAL	10	.688	38	38	3.11	106	20	5	0	269.1	253	93	106	17	86	2	0	4	1,111	2	3.54	2.87	1.23	0.57	9.5	7.7	1.26	.262	3.54	89	3.58	102	8.45	-2.6