most wins by a pitcher in a season in the live ball era

Since 1920, Denny McLain, Lefty Grove and Jim Bagby 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	Jim Bagby J. Bagby	31	1920	CLE	12	.721	48	38	2.89	73	30	3	0	339.2	338	109	122	9	79	5	9		1,355	6	1.93	2.09	0.92	0.24	5.4	5.8	1.23	.277	3.23	75	3.41	92	8.96	12
4	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
5	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
6	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
7	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
8	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
9	Dazzy Vance D. Vance	28	1924	BKN	6	.824	35	34	2.16	262	30	3	0	308.1	238	74	89	11	77	9	1		1,221	4	7.65	2.25	3.40	0.32	21.5	6.3	1.02	.263	2.60	58	2.64	69	6.95	41.3
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	George Uhle G. Uhle	27	1926	CLE	11	.711	39	36	2.83	159	32	3	1	318.1	300	100	114	7	118	13	2		1,367	8	4.50	3.34	1.35	0.20	11.6	8.6	1.31	.274	3.22	70	3.44	85	8.48	21.7
18	Dolf Luque D. Luque	27	1923	CIN	8	.771	41	37	1.93	151	28	6	2	322.0	279	69	90	2	88	5	4		1,301	4	4.22	2.46	1.72	0.06	11.6	6.8	1.14	.263	2.52	50	2.94	77	7.80	31
19	Eddie Rommel E. Rommel	27	1922	PHA	13	.675	51	33	3.28	54	22	3	2	294.0	294	107	128	21	63	5	16		1,203	3	1.65	1.93	0.86	0.64	4.5	5.2	1.21	.258	3.92	80	4.26	102	9.00	-2.3
20	Carl Mays C. Mays	27	1921	NYY	9	.750	49	38	3.05	70	30	1	7	336.2	332	114	145	11	76	9	10		1,400	2	1.87	2.03	0.92	0.29	5.0	5.4	1.21	.260	3.88	71	3.87	93	8.88	11.3
21	Urban Shocker U. Shocker	27	1921	SLA	12	.692	47	38	3.55	132	30	4	4	326.2	345	129	151	21	86	6	8		1,401	3	3.64	2.37	1.53	0.58	9.4	6.1	1.32	.280	4.16	81	3.98	93	9.51	12.2
22	Grover Alexander G. Alexander	27	1920	CHC	14	.659	46	40	1.91	173	33	7	5	363.1	335	77	96	8	69	1	6		1,447	3	4.29	1.71	2.51	0.20	12.0	4.8	1.11	.273	2.38	61	2.66	81	8.30	25
23	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
24	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
25	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