Ed Walsh has pitched the most innings in a month, with 107 innings in September 1908.

Interpreted as:

highest ip by a player in a month

	NAME	IP	MONTH	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Ed Walsh E. Walsh	107.0	September 1908	13	9	4	.692	12		74	11	6	0	70		13	1	12	2	1	396	2	6.22	1.01	6.17	0.08	18.7	3.0	0.77	.225	1.09	5.89
2	Joe McGinnity J. McGinnity	105.0	August 1903	12	7	5	.583	12		58	11	0	0	89		36	1	22	2	0	420	1	4.97	1.89	2.64	0.09	13.8	5.2	1.06	.261	3.09	7.63
3	Dave Davenport D. Davenport	101.1	September 1915	14	8	2	.800	11	1.51	40	9	4	0	63	17	18	2	19	0	2		1	3.55	1.69	2.11	0.18		6.4	0.81	.258	1.60	5.60
4	Ed Walsh E. Walsh	101.0	July 1907	11	6	5	.545	11		45	11	2	0	78		24	1	20	2	0	397	2	4.01	1.78	2.25	0.09	11.3	5.0	0.97	.234	2.14	6.95
5	Rube Waddell R. Waddell	99.2	July 1902	12	9	1	.900	9	2.26	85	9	1	0	81	25	30	4	21	3	2		4	7.68	1.90	4.05	0.36		5.9	1.02	.314	2.71	7.31
6	Snake Wiltse S. Wiltse	94.0	August 1901	10	8	2	.800	10	2.39	23	10	2	0	99	25	41	1	17	4	0	400	3	2.20	1.63	1.35	0.10	5.8	4.3	1.23	.276	3.93	9.48
7	Joe McGinnity J. McGinnity	93.1	September 1901	12	5	7	.417	12	3.47	18	10	1	0	98	36	55	1	20	8	0		3	1.74	1.93	0.90	0.10		5.6	1.26	.313	5.30	9.45
8	Bill Dinneen B. Dinneen	92.0	July 1902	9	4	5	.444	9	2.25	37	9	0	0	73	23	28	3	18	0	0	351	1	3.62	1.76	2.06	0.29	10.5	5.1	0.99	.239	2.74	7.14
9	Jack Coombs J. Coombs	90.1	July 1910	11	10	1	.909	10		49	10	5	0	68		17	0	28	1	1	352	3	4.88	2.79	1.75	0.00	13.9	8.0	1.06	.248	1.69	6.77
10	Frank Owen F. Owen	89.1	July 1905	10	6	3	.667	10		36	9	1	0	67		24	1	12	2	0		2	3.63	1.21	3.00	0.10		3.7	0.88	.242	2.42	6.75
11	Dave Davenport D. Davenport	89.0	July 1915	12	3	6	.333	11	2.73	59	6	2	0	71	27	32	0	20	2	1		1	5.97	2.02	2.95	0.00		10.3	1.02	.623	3.24	7.18
12	Dummy Taylor D. Taylor	89.0	August 1901	10	3	7	.300	10	2.73	25	9	1	0	96	27	48	1	31	4	0		1	2.53	3.13	0.81	0.10		8.8	1.43	.324	4.85	9.71
13	Cy Young C. Young	89.0	August 1901	10	7	3	.700	10	1.42	39	8	2	0	82	14	22	0	7	2	0		0	3.94	0.71	5.57	0.00		2.4	1.00	.343	2.22	8.29
14	Jack Taylor J. Taylor	89.0	July 1901	10	6	4	.600	10	2.43	27	10	0	0	105		45	1	8	1	0		0	2.73	0.81	3.38	0.10		2.0	1.27	.293	4.55	10.62
15	Bill James B. James	88.0	September 1914	10	8	0	1.000	9	2.15	54	9	0	0	78	21	30	1	31	1	1	357	1	5.52	3.17	1.74	0.10	15.1	8.7	1.24	.285	3.07	7.98
16	Ed Walsh E. Walsh	87.2	August 1907	13	4	4	.500	9		44	5	0	1	69		26	0	20	2	4		2	4.52	2.05	2.20	0.00		11.3	1.02	.622	2.67	7.08
17	Mike O'Neill M. O'Neill	87.2	July 1902	10	6	2	.750	9	2.77	26	9	1	1	75		31	1	12	3	1		0	2.67	1.23	2.17	0.10		3.7	0.99	.263	3.18	7.70
18	Scott Perry S. Perry	87.1	August 1918	11	8	2	.800	8	0.93	27	6	1	0	76	9	15	0	34	1	3	358	0	2.78	3.50	0.79	0.00	7.5	9.5	1.26	.257	1.55	7.83
19	Jack Powell J. Powell	87.1	August 1903	10	7	2	.778	9	0.93	66	9	2	1	63		17	1	14	1	1		0	6.80	1.44	4.71	0.10		4.2	0.88	.248	1.75	6.49
20	Roscoe Miller R. Miller	87.0	July 1901	9	8	1	.889	8	2.59	19	8	0	0	83	25	39	0	23	2	0		1	1.97	2.38	0.83	0.00		6.5	1.22	.269	4.03	8.59
21	Ed Walsh E. Walsh	86.2	July 1908	11	8	2	.800	9		40	8	0	0	75		26	0	14	1	2	348	3	4.15	1.45	2.86	0.00	11.5	4.0	1.03	.256	2.70	7.79
22	Rube Waddell R. Waddell	86.2	July 1905	10	5	4	.556	9		62	7	0	0	76		29	1	29	3	1		1	6.44	3.01	2.14	0.10		9.4	1.21	.350	3.01	7.89
23	Grover Alexander G. Alexander	86.1	September 1916	11	7	3	.700	10	2.08	35	8	2	1	91	20	29	1	11	2	1	352	0	3.65	1.15	3.18	0.10	9.9	3.1	1.18	.297	3.02	9.49
24	Jack Coombs J. Coombs	86.1	August 1910	10	7	2	.778	9		65	8	3	0	60		13	0	27	1	1		2	6.78	2.81	2.41	0.00		8.1	1.01	.251	1.36	6.25
25	Christy Mathewson C. Mathewson	86.1	September 1908	12	9	1	.900	9		59	8	2	0	55		11	2	5	1	2	323	0	6.15	0.52	11.80	0.21	18.3	1.5	0.69	.207	1.15	5.73