most innings pitched by a starting pitcher single season mlb

Jack Chesbro has pitched the most innings by a starting pitcher in a season, with 444 innings in 1904.

	NAME	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	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	444.0	1904	NYH	51	38	12	.760	51	1.82	232	48	6	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	426.1	1908	CWS	49	35	14	.714	49		236	42	11	0	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	Joe McGinnity J. McGinnity	420.1	1903	NYG	48	29	18	.617	48		162	44	3	0	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
4	Vic Willis V. Willis	404.2	1902	BSN	46	26	19	.578	46	2.20	227	45	4	0	368	99	139	6	101	13	0			13	5.05	2.25	2.25	0.13		6.2	1.16	.284	3.09	8.18
5	Joe McGinnity J. McGinnity	393.1	1904	NYG	44	31	8	.795	44		139	38	9	0	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
6	Grover Alexander G. Alexander	388.1	1916	PHN	45	33	12	.733	45	1.55	169	38	16	0	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
7	Grover Alexander G. Alexander	386.0	1917	PHN	44	30	13	.698	44	1.84	199	35	8	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
8	Rube Waddell R. Waddell	383.0	1904	PHA	46	25	19	.568	46	1.62	349	39	8	0	307	69	109	5	91	14	0			8	8.20	2.14	3.84	0.12		6.4	1.04	.312	2.56	7.21
9	George Mullin G. Mullin	381.1	1904	DET	44	16	23	.410	44	2.38	161	42	7	0	344	101	153	1	129	10	0			8	3.80	3.04	1.25	0.02		8.5	1.24	.280	3.61	8.12
10	Jack Powell J. Powell	379.2	1904	NYH	45	22	19	.537	45	2.42	200	38	3	0	331	102	149	14	94	10	0			12	4.74	2.23	2.13	0.33		6.9	1.12	.305	3.53	7.85
11	Ed Walsh E. Walsh	378.1	1907	CWS	46	24	17	.585	46		191	37	5	0	314		116	3	83	8	0			11	4.54	1.97	2.30	0.07		6.4	1.05	.308	2.76	7.47
12	Wilbur Wood W. Wood	376.2	1972	CWS	49	24	17	.585	49	2.51	193	20	8	0	325	105	119	28	74	7	0	5	1,490	11	4.61	1.77	2.61	0.67	13.0	5.0	1.06	.250	2.84	7.77
13	Mickey Lolich M. Lolich	376.0	1971	DET	45	25	14	.641	45	2.92	308	29	4	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	8.04
14	Noodles Hahn N. Hahn	375.1	1901	CIN	42	22	19	.537	42	2.71	238	41	2	0	370	113	159	12	70	8	0			10	5.71	1.68	3.40	0.29		4.5	1.17	.292	3.81	8.87
15	Cy Young C. Young	374.2	1902	BSA	43	32	11	.744	43	2.04	161	41	3	0	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
16	Irv Young I. Young	373.1	1905	BSN	42	20	21	.488	42		157	41	7	0	333		144	6	70	9	0		1,463	5	3.78	1.69	2.24	0.14	10.7	4.8	1.08	.268	3.47	8.03
17	Bill Dinneen B. Dinneen	371.1	1902	BSA	42	21	21	.500	42	2.93	142	39	2	0	348	121	155	9	99	8	0			3	3.44	2.40	1.43	0.22		6.8	1.20	.284	3.76	8.43
18	Grover Alexander G. Alexander	369.0	1915	PHN	42	30	9	.769	42	1.24	237	36	12	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
19	Cy Falkenberg C. Falkenberg	367.0	1914	IND	43	25	16	.610	43	2.18	229	33	9	0	317	89	123	5	84	6	0			8	5.62	2.06	2.73	0.12		7.0	1.09	.355	3.02	7.77
20	Togie Pittinger T. Pittinger	365.1	1902	BSN	40	25	13	.658	40	2.34	162	36	7	0	327	95	121	2	116	14	0			5	3.99	2.86	1.40	0.05		8.6	1.21	.308	2.98	8.06
21	Cy Young C. Young	365.0	1904	BSA	41	25	16	.610	41	2.02	194	40	10	0	321	82	103	6	29	5	0			4	4.78	0.72	6.69	0.15		2.1	0.96	.271	2.54	7.92
22	Dave Davenport D. Davenport	364.2	1915	SLF	46	22	16	.579	46	2.12	207	30	10	0	275	86	103	5	87	5	0			4	5.11	2.15	2.38	0.12		8.7	0.99	.387	2.54	6.79
23	Cy Young C. Young	364.2	1901	BSA	41	31	10	.756	41	1.65	157	38	5	0	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
24	Christy Mathewson C. Mathewson	363.0	1908	NYG	44	32	10	.762	44		238	34	11	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
25	Joe McGinnity J. McGinnity	363.0	1901	BAL	43	24	19	.558	43	3.55	71	39	1	0	390	143	210	7	90	21	0			5	1.76	2.23	0.79	0.17		6.0	1.32	.293	5.21	9.67