most wins by a pitcher on a team in a single season since 1950 mlb

Since 1950, Denny McLain has won the most games in a season, with 31 wins in 1968.

	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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	Mickey Lolich M. Lolich	25	1971	DET	14	.641	45	45	2.92	308	29	4	0	376.0	336	122	133	36	92	7	0	2	1,538	7	7.37	2.20	3.35	0.86	20.0	6.0	1.14	.274	3.18	83	2.84	78	8.04	32.5
14	Tom Seaver T. Seaver	25	1969	NYM	7	.781	36	35	2.21	208	18	5	0	273.1	202	67	75	24	82	7	1	9	1,089	8	6.85	2.70	2.54	0.79	19.1	7.5	1.04	.232	2.47	62	3.10	91	6.65	9.4
15	Jim Kaat J. Kaat	25	1966	MIN	13	.658	41	41	2.75	205	19	3	0	304.2	271	93	114	29	55	3	0	4	1,227	12	6.06	1.62	3.73	0.86	16.7	4.5	1.07	.259	3.37	77	3.02	82	8.01	22.7
16	Juan Marichal J. Marichal	25	1966	SFG	6	.806	37	36	2.23	222	25	4	0	307.1	228	76	88	32	36	5	1	3	1,180	3	6.50	1.05	6.17	0.94	18.8	3.1	0.86	.221	2.58	62	2.86	82	6.68	21.3
17	Sandy Koufax S. Koufax	25	1963	LAD	5	.833	40	40	1.88	306	20	11	0	311.0	214	65	68	18	58	3	0	7	1,210	6	8.86	1.68	5.28	0.52	25.3	4.8	0.87	.238	1.97	62	1.85	62	6.19	41.9
18	Juan Marichal J. Marichal	25	1963	SFG	8	.758	41	40	2.41	248	18	5	0	321.1	259	86	102	27	61	2	1	6	1,270	2	6.95	1.71	4.07	0.76	19.5	4.8	1.00	.249	2.86	73	2.62	80	7.25	23.3
19	Don Drysdale D. Drysdale	25	1962	LAD	9	.735	43	41	2.83	232	19	2	1	314.1	272	99	122	21	78	11	2	12	1,289	8	6.64	2.23	2.97	0.60	18.0	6.1	1.11	.265	3.49	78	2.86	81	7.79	23.9
20	Whitey Ford W. Ford	25	1961	NYY	4	.862	39	39	3.21	209	11	3	0	283.0	242	101	108	23	92	1	0	3	1,159	8	6.65	2.93	2.27	0.73	18.0	7.9	1.18	.263	3.43	85	3.14	82	7.70	22.7
21	Justin Verlander J. Verlander	24	2011	DET	5	.828	34	34	2.40	250	4	2	0	251.0	174	67	73	24	57	3	0	0	969	7	8.96	2.04	4.39	0.86	25.8	5.9	0.92	.236	2.62	58	2.99	74	6.24	29.4
22	Randy Johnson R. Johnson	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
23	John Smoltz J. Smoltz	24	1996	ATL	8	.750	35	35	2.94	276	6	2	0	253.2	199	83	93	19	55	2	0	3	995	10	9.79	1.95	5.02	0.67	27.7	5.5	1.00	.280	3.30	69	2.63	60	7.06	48.4
24	Frank Viola F. Viola	24	1988	MIN	7	.774	35	35	2.64	193	7	2	0	255.1	236	75	80	20	54	3	0	2	1,031	5	6.80	1.90	3.57	0.70	18.7	5.2	1.14	.284	2.82	64	2.94	74	8.32	28.7
25	Roger Clemens R. Clemens	24	1986	BOS	4	.857	33	33	2.48	238	10	1	0	254.0	179	70	77	21	67	4	0	0	997	11	8.43	2.37	3.55	0.74	23.9	6.7	0.97	.237	2.73	58	2.80	69	6.34	36.3