most wins in a season by starting pitcher

Jack Chesbro has won the most games by a starting pitcher in a season, with 38 wins in 1904.

	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	H/9
1	Jack Chesbro J. Chesbro	38	1904	NYH	12	.760	51	51	1.82	232	48	6	0	444.0	328	90	122	4	85	7	0			8	4.70	1.72	2.73	0.08		5.1	0.93	.240	2.47	6.65
2	Ed Walsh E. Walsh	35	1908	CWS	14	.714	49	49		236	42	11	0	426.1	315		93	1	55	11	0		1,634	10	4.98	1.16	4.29	0.02	14.4	3.4	0.87	.236	1.96	6.65
3	Grover Alexander G. Alexander	33	1916	PHN	12	.733	45	45	1.55	169	38	16	0	388.1	322	67	90	6	50	10	0		1,496	3	3.92	1.16	3.38	0.14	11.3	3.3	0.96	.251	2.09	7.46
4	Joe Wood J. Wood	33	1912	BSA	5	.868	38	38	0.27	249	35	10	0	334.1	258		98	2	81	12	0		1,323	7	6.70	2.18	3.07	0.05	18.8	6.1	1.01	.261	2.64	6.95
5	Christy Mathewson C. Mathewson	32	1908	NYG	10	.762	44	44		238	34	11	0	363.0	267		80	5	36	2	0		1,380	2	5.90	0.89	6.61	0.12	17.2	2.6	0.83	.238	1.98	6.62
6	Cy Young C. Young	32	1902	BSA	11	.744	43	43	2.04	161	41	3	0	374.2	338	85	129	4	52	10	0			3	3.87	1.25	3.10	0.10		3.5	1.04	.269	3.10	8.12
7	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	6.46
8	Joe McGinnity J. McGinnity	31	1904	NYG	8	.795	44	44		139	38	9	0	393.1	292		98	8	86	13	0		1,553	2	3.18	1.97	1.62	0.18	9.0	5.5	0.96	.217	2.24	6.68
9	Christy Mathewson C. Mathewson	31	1904	NYG	12	.721	46	46		208	33	4	0	361.2	305		119	6	78	4	0		1,454	10	5.18	1.94	2.67	0.15	14.3	5.4	1.06	.258	2.96	7.59
10	Cy Young C. Young	31	1901	BSA	10	.756	41	41	1.65	157	38	5	0	364.2	320	67	111	6	39	8	0			1	3.87	0.96	4.03	0.15		2.9	0.98	.276	2.74	7.90
11	Grover Alexander G. Alexander	30	1917	PHN	13	.698	44	44	1.84	199	35	8	0	386.0	336	79	107	4	56	6	0		1,526	2	4.64	1.31	3.55	0.09	13.0	3.7	1.02	.263	2.49	7.83
12	Grover Alexander G. Alexander	30	1915	PHN	9	.769	42	42	1.24	237	36	12	0	369.0	247	51	83	3	62	9	0		1,406	2	5.78	1.51	3.82	0.07	16.9	4.4	0.84	.223	2.02	6.02
13	Walter Johnson W. Johnson	29	1913	WSH	7	.806	36	36	1.19	207	29	11	0	310.1	206	41	51	9	35	7	0		1,157	2	6.00	1.02	5.91	0.26	17.9	3.0	0.78	.219	1.48	5.97
14	Christy Mathewson C. Mathewson	29	1905	NYG	8	.784	37	37		201	32	8	0	315.0	236		76	4	60	1	0		1,203	6	5.74	1.71	3.35	0.11	16.7	5.0	0.94	.248	2.17	6.74
15	Joe McGinnity J. McGinnity	29	1903	NYG	18	.617	48	48		162	44	3	0	420.1	377		154	4	107	14	0		1,729	5	3.47	2.29	1.51	0.09	9.4	6.2	1.15	.259	3.30	8.07
16	Robin Roberts R. Roberts	28	1952	PHN	7	.800	37	37	2.64	146	30	3	0	327.0	292	96	104	22	45	5	0		1,300	3	4.02	1.24	3.24	0.61	11.2	3.5	1.03	.250	2.86	8.04
17	Christy Mathewson C. Mathewson	28	1903	NYG	13	.683	42	42		263	37	3	0	360.2	318		135	4	99	10	0		1,478	17	6.56	2.47	2.66	0.10	17.8	6.7	1.16	.285	3.37	7.94
18	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	8.09
19	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	6.68
20	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	6.72
21	Bucky Walters B. Walters	27	1939	CIN	8	.771	36	36	2.13	131	31	2	0	312.0	239	74	91	15	102	6	0		1,246	7	3.78	2.94	1.28	0.43	10.5	8.2	1.09	.226	2.63	6.89
22	Lefty Grove L. Grove	27	1931	PHA	3	.900	30	30	1.94	144	27	4	0	260.1	223	56	73	9	57	1	0		1,044	2	4.98	1.97	2.53	0.31	13.8	5.5	1.08	.257	2.52	7.71
23	Dazzy Vance D. Vance	27	1924	BKN	6	.818	34	34	2.19	256	30	3	0	304.0	237	74	88	11	76	7	0		1,207	4	7.58	2.25	3.37	0.33	21.2	6.3	1.03	.264	2.61	7.02
24	Eddie Cicotte E. Cicotte	27	1919	CWS	6	.818	35	35	1.82	106	30	5	0	297.1	248	60	75	5	46	3	0		1,164	1	3.21	1.39	2.30	0.15	9.1	4.0	0.99	.242	2.27	7.51
25	Walter Johnson W. Johnson	27	1912	WSH	10	.730	37	37	0.17	271	34	7	0	318.0	228		80	2	66	14	0		1,238	9	7.67	1.87	4.11	0.06	21.9	5.3	0.92	.255	2.26	6.45