most wins in a season by a pitcher since 1930

Since 1930, Denny McLain and Lefty Grove are tied for winning the most games in a season, with 31 wins.

	NAME	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	Denny McLain D. McLain	31	1968	DET	6	.838	41	41	1.96	280	28	6	0	336.0	241	73	86	31	63	6	0	2	1,288	3	7.50	1.69	4.44	0.83	21.7	4.9	0.90	.231	2.30	64	2.53	79	6.46	24.8
2	Lefty Grove L. Grove	31	1931	PHA	4	.886	41	30	2.06	175	27	4	5	288.2	249	66	84	10	62	1	10		1,160	2	5.46	1.93	2.82	0.31	15.1	5.3	1.08	.262	2.62	47	3.01	70	7.76	40.8
3	Dizzy Dean D. Dean	30	1934	SLN	7	.811	50	33	2.66	195	24	7	7	311.2	288	92	110	14	75	6	14		1,291	2	5.63	2.17	2.60	0.40	15.1	5.8	1.16	.274	3.18	64	3.23	77	8.32	32.6
4	Hal Newhouser H. Newhouser	29	1944	DET	9	.763	47	34	2.22	187	25	6	2	312.1	264	77	94	6	102	1	10		1,271	4	5.39	2.94	1.83	0.17	14.7	8.0	1.17	.265	2.71	62	2.58	72	7.61	34.5
5	Robin Roberts R. Roberts	28	1952	PHN	7	.800	39	37	2.59	148	30	3	2	330.0	292	95	104	22	45	5	2		1,310	3	4.04	1.23	3.29	0.60	11.3	3.4	1.02	.248	2.84	72	2.82	78	7.96	28.9
6	Dizzy Dean D. Dean	28	1935	SLN	12	.700	50	36	3.04	190	29	3	5	325.1	324	110	126	16	77	4	14		1,362	1	5.26	2.13	2.47	0.44	14.0	5.7	1.23	.287	3.49	74	3.27	79	8.96	31
7	Lefty Grove L. Grove	28	1930	PHA	5	.848	50	32	2.54	209	22	2	9	291.0	273	82	101	8	60	5	17		1,191	2	6.46	1.86	3.48	0.25	17.5	5.0	1.14	.292	3.12	53	3.09	64	8.44	55.6
8	Bob Welch B. Welch	27	1990	OAK	6	.818	35	35	2.95	127	2	2	0	238.0	214	78	90	26	77	5	0	4	979	2	4.80	2.91	1.65	0.98	13.0	7.9	1.22	.253	3.40	79	4.19	110	8.09	-11.1
9	Steve Carlton S. Carlton	27	1972	PHI	10	.730	41	41	1.97	310	30	8	0	346.1	257	76	84	17	87	1	0	8	1,351	8	8.06	2.26	3.56	0.44	22.9	6.4	0.99	.256	2.18	56	2.00	59	6.68	53.5
10	Sandy Koufax S. Koufax	27	1966	LAD	9	.750	41	41	1.73	317	27	5	0	323.0	241	62	74	19	77	0	0	4	1,274	7	8.83	2.15	4.12	0.53	24.9	6.0	0.98	.258	2.06	53	2.07	65	6.72	41.8
11	Don Newcombe D. Newcombe	27	1956	BKN	7	.794	38	36	3.06	139	18	5	0	268.0	219	91	101	33	46	3	2	8	1,052	4	4.67	1.54	3.02	1.11	13.2	4.4	0.99	.224	3.39	78	3.48	86	7.35	17.3
12	Dizzy Trout D. Trout	27	1944	DET	14	.659	49	40	2.12	144	33	7	0	352.1	314	83	104	9	83	4	6		1,421	2	3.68	2.12	1.73	0.23	10.1	5.8	1.13	.258	2.66	59	2.79	78	8.02	31
13	Bob Feller B. Feller	27	1940	CLE	11	.711	43	37	2.61	261	31	4	4	320.1	245	93	102	13	118	5	5		1,304	8	7.33	3.32	2.21	0.37	20.0	9.0	1.13	.256	2.87	65	2.89	73	6.88	39.3
14	Bucky Walters B. Walters	27	1939	CIN	11	.711	39	36	2.29	137	31	2	0	319.0	250	81	98	15	109	6	2		1,283	8	3.87	3.08	1.26	0.42	10.7	8.5	1.13	.231	2.76	60	3.81	96	7.05	4.8
15	Juan Marichal J. Marichal	26	1968	SFG	9	.743	38	38	2.43	218	30	5	0	325.2	295	88	106	21	46	6	0	9	1,307	8	6.02	1.27	4.74	0.58	16.7	3.5	1.05	.270	2.93	83	2.36	85	8.15	14.6
16	Sandy Koufax S. Koufax	26	1965	LAD	8	.765	43	41	2.04	382	27	8	2	335.2	216	76	90	26	71	5	2	4	1,297	11	10.24	1.90	5.38	0.70	29.5	5.5	0.86	.234	2.41	63	1.93	61	5.79	47.9
17	Bob Feller B. Feller	26	1946	CLE	15	.634	48	42	2.18	348	36	10	4	371.1	277	90	101	11	153	3	5		1,512	3	8.43	3.71	2.27	0.27	23.0	10.1	1.16	.267	2.45	65	2.16	65	6.71	48.3
18	Hal Newhouser H. Newhouser	26	1946	DET	9	.743	37	34	1.94	275	29	6	1	292.2	215	63	77	10	98	1	2		1,176	8	8.46	3.01	2.81	0.31	23.4	8.3	1.07	.259	2.37	54	1.96	56	6.61	49.6
19	Carl Hubbell C. Hubbell	26	1936	NYG	6	.813	42	34	2.31	123	25	3	3	304.0	265	78	81	7	57	5	6		1,202	3	3.64	1.69	2.16	0.21	10.2	4.7	1.06	.255	2.40	59	3.37	81	7.85	26.6
20	Lefty Gomez L. Gomez	26	1934	NYY	5	.839	38	33	2.33	158	25	6	2	281.2	223	73	86	12	96	0	5		1,142	3	5.05	3.07	1.65	0.38	13.8	8.4	1.13	.241	2.75	56	3.57	86	7.13	17.7
21	Alvin Crowder A. Crowder	26	1932	WSH	13	.667	50	39	3.33	103	21	3	1	327.0	319	121	136	17	77	0	10		1,356	0	2.83	2.12	1.34	0.47	7.6	5.7	1.21	.261	3.74	76	3.77	88	8.78	18.5
22	Steve Stone S. Stone	25	1980	BAL	7	.781	37	37	3.23	149	9	1	0	250.2	224	90	103	22	101	6	0	3	1,048	7	5.35	3.63	1.48	0.79	14.2	9.6	1.30	.262	3.70	83	3.98	101	8.04	-1.1
23	Ron Guidry R. Guidry	25	1978	NYY	3	.893	35	35	1.74	248	16	9	0	273.2	187	53	61	13	72	1	0	1	1,057	7	8.16	2.37	3.44	0.43	23.5	6.8	0.95	.241	2.01	48	2.18	58	6.15	48.5
24	Catfish Hunter C. Hunter	25	1974	OAK	12	.676	41	41	2.49	143	23	6	0	318.1	268	88	97	25	46	4	0	2	1,240	1	4.04	1.30	3.11	0.71	11.5	3.7	0.99	.238	2.74	73	3.16	86	7.58	17.6
25	Fergie Jenkins F. Jenkins	25	1974	TEX	12	.676	41	41	2.82	225	29	6	0	328.1	286	103	117	27	45	8	0	3	1,305	4	6.17	1.23	5.00	0.74	17.2	3.4	1.01	.259	3.21	79	2.75	77	7.84	29.4