most wins in a season by a pitcher in the 1900s

Between the 1900 and 1909 seasons, Jack Chesbro won the most games in a season, with 41 wins in 1904.

	NAME	W	SEASON	TM	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jack Chesbro J. Chesbro	41	1904	NYH	12	.774	55	51	1.82	239	48	6	0	454.2	338	92	128	4	88	7	3	1,720	9	4.73	1.74	2.72	0.08	13.9	5.1	0.94	.242	2.53	65	2.11	78	6.69	32.5
2	Ed Walsh E. Walsh	40	1908	CWS	15	.727	66	49	1.42	269	42	11	6	464.0	343	73	111	2	56	9	16	1,755	10	5.22	1.09	4.80	0.04	15.3	3.2	0.86	.240	2.15	63	1.42	67	6.65	34.2
3	Christy Mathewson C. Mathewson	37	1908	NYG	11	.771	56	44	1.43	259	34	11	5	390.2	281	62	85	5	42	3	9	1,469	2	5.97	0.97	6.17	0.12	17.6	2.9	0.83	.238	1.96	61	1.29	52	6.47	52.4
4	Joe McGinnity J. McGinnity	35	1904	NYG	8	.814	51	44	1.61	144	38	9	5	408.0	307	73	103	8	86	13	7	1,588	2	3.18	1.90	1.67	0.18	9.1	5.4	0.96	.224	2.27	59	2.70	96	6.77	5.3
5	Christy Mathewson C. Mathewson	33	1904	NYG	12	.733	48	46	2.03	212	33	4	1	367.2	306	83	120	7	78	4	2	1,437	10	5.19	1.91	2.72	0.17	14.8	5.4	1.04	.263	2.94	75	2.18	78	7.49	25.8
6	Cy Young C. Young	33	1901	BSA	10	.767	43	41	1.62	158	38	5	0	371.1	324	67	112	6	37	7	2	1,440	2	3.83	0.90	4.27	0.15	11.0	2.6	0.97	.258	2.71	44	2.64	72	7.85	42.6
7	Cy Young C. Young	32	1902	BSA	11	.744	45	43	2.15	160	41	3	0	384.2	350	92	136	6	53	13	1	1,506	3	3.74	1.24	3.02	0.14	10.6	3.5	1.05	.270	3.18	60	2.55	74	8.19	37.5
8	Christy Mathewson C. Mathewson	31	1905	NYG	9	.775	43	37	1.28	206	32	8	3	338.2	252	48	85	4	64	1	6	1,294	6	5.47	1.70	3.22	0.11	15.9	4.9	0.93	.243	2.26	42	2.03	69	6.70	34.9
9	Joe McGinnity J. McGinnity	31	1903	NYG	20	.608	55	48	2.43	171	44	3	2	434.0	391	117	162	4	109	19	6	1,786	5	3.55	2.26	1.57	0.08	9.6	6.1	1.15	.261	3.36	75	2.97	91	8.11	13
10	Christy Mathewson C. Mathewson	30	1903	NYG	13	.698	45	42	2.26	267	37	3	2	366.1	321	92	136	4	100	10	3	1,502	18	6.56	2.46	2.67	0.10	17.8	6.7	1.15	.283	3.34	70	2.34	72	7.89	37
11	George Mullin G. Mullin	29	1909	DET	8	.784	40	35	2.22	124	29	3	1	303.2	258	75	96	1	78	8	5	1,189	5	3.68	2.31	1.59	0.03	10.4	6.6	1.11	.263	2.85	86	2.29	92	7.65	8
12	Mordecai Brown M. Brown	29	1908	CHC	9	.763	44	31	1.47	123	27	9	5	312.1	214	51	64	1	49	5	12	1,153	6	3.54	1.41	2.51	0.03	10.7	4.2	0.84	.218	1.84	63	1.87	75	6.17	21.5
13	Cy Young C. Young	28	1903	BSA	9	.757	40	35	2.08	176	34	7	2	341.2	294	79	115	6	37	9	5	1,314	5	4.64	0.97	4.76	0.16	13.4	2.8	0.97	.265	3.03	70	2.35	80	7.74	22.2
14	Jack Chesbro J. Chesbro	28	1902	PIT	6	.824	35	33	2.17	136	31	8	1	286.1	242	69	81	1	62	21	2	1,139	3	4.27	1.95	2.19	0.03	11.9	5.4	1.06	.262	2.55	78	2.63	90	7.61	9
15	Joe McGinnity J. McGinnity	28	1900	BKN	8	.778	44	37	2.94	93	32	1	0	343.0	350	112	179	5	113	40	7	1,480	4	2.44	2.97	0.82	0.13	6.3	7.6	1.35	.281	4.70	79	3.81	102	9.18	-2.4
16	Mordecai Brown M. Brown	27	1909	CHC	9	.750	50	34	1.31	172	32	8	7	342.2	246	50	78	1	53	7	15	1,280	9	4.52	1.39	3.25	0.03	13.4	4.1	0.87	.234	2.05	51	1.78	68	6.46	32.4
17	Addie Joss A. Joss	27	1907	CLE	11	.711	42	38	1.83	127	34	6	2	338.2	279	69	100	3	54	7	4	1,291	1	3.38	1.44	2.35	0.08	9.8	4.2	0.98	.251	2.66	73	2.09	89	7.41	9.8
18	Doc White D. White	27	1907	CWS	13	.675	46	35	2.26	141	24	6	1	291.0	270	73	93	3	38	6	9	1,131	0	4.36	1.18	3.71	0.09	12.5	3.4	1.06	.283	2.88	95	1.80	80	8.35	12.8
19	Joe McGinnity J. McGinnity	27	1906	NYG	12	.692	45	37	2.25	105	32	3	2	339.2	316	85	127	1	71	7	6	1,364	0	2.78	1.88	1.48	0.03	7.7	5.2	1.14	.267	3.37	85	2.48	90	8.37	11
20	Al Orth A. Orth	27	1906	NYH	17	.614	45	39	2.34	133	36	3	0	338.2	317	88	115	2	66	1	5	1,331	7	3.53	1.75	2.02	0.05	10.0	5.0	1.13	.279	3.06	81	2.25	81	8.42	21.5
21	Rube Waddell R. Waddell	27	1905	PHA	10	.730	46	34	1.48	287	27	7	0	328.2	231	54	86	5	90	10	11	1,257	10	7.86	2.46	3.19	0.14	22.8	7.2	0.98	.261	2.35	55	1.89	69	6.33	31.2
22	Togie Pittinger T. Pittinger	27	1902	BSN	16	.628	46	40	2.52	174	36	7	0	389.1	360	109	139	4	128	16	5	1,611	6	4.02	2.96	1.36	0.09	10.8	7.9	1.25	.276	3.21	87	3.02	99	8.32	2.9
23	Vic Willis V. Willis	27	1902	BSN	20	.574	51	46	2.20	225	45	4	3	410.0	372	100	142	6	101	14	5	1,652	12	4.94	2.22	2.23	0.13	13.6	6.1	1.15	.280	3.12	76	2.60	86	8.17	21.3
24	Mordecai Brown M. Brown	26	1906	CHC	6	.813	36	32	1.04	144	27	9	3	277.1	198	32	56	1	61	4	4	1,044	2	4.67	1.98	2.36	0.03	13.8	5.8	0.93	.236	1.82	39	2.08	75	6.43	21.1
25	Eddie Plank E. Plank	26	1904	PHA	17	.605	44	43	2.17	201	37	7	0	357.1	311	86	111	2	86	19	1	1,427	6	5.06	2.17	2.34	0.05	14.1	6.0	1.11	.276	2.80	82	2.25	88	7.83	13.1