Jack Coombs has won the most games in a month, with 10 wins in July 1910.

Interpreted as:

MLB most wins by a player in a month

	NAME	W	MONTH	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 Coombs J. Coombs	10	July 1910	1	.909	11	10		49	10	5	0	90.1	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
2	Grover Alexander G. Alexander	9	May 1920	0	1.000	9	8	1.22	34	8	2	0	74.0	59	10	12	3	11	0	1		279	0	4.14	1.34	3.09	0.36	12.2	3.9	0.95	.242	1.46	7.18
3	Dick Rudolph D. Rudolph	9	September 1914	0	1.000	9	9	1.56	47	9	3	0	81.0	70	14	19	2	8	0	0		307	0	5.22	0.89	5.88	0.22	15.3	2.6	0.96	.272	2.11	7.78
4	Ed Walsh E. Walsh	9	September 1908	4	.692	13	12		74	11	6	0	107.0	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
5	Christy Mathewson C. Mathewson	9	September 1908	1	.900	12	9		59	8	2	0	86.1	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
6	Jack Chesbro J. Chesbro	9	September 1904	2	.818	11	10	1.50	42	9	0	0	84.0	66	14	21	1	10	0	1			1	4.50	1.07	4.20	0.11		3.2	0.90	.254	2.25	7.07
7	Christy Mathewson C. Mathewson	9	August 1904	1	.900	10	9		40	7	2	0	69.0	56		21	1	12	2	1		272	0	5.22	1.57	3.33	0.13	14.7	4.4	0.99	.253	2.74	7.30
8	Joe McGinnity J. McGinnity	9	May 1904	0	1.000	9	8		24	8	4	0	74.0	44		10	1	17	3	1		283	0	2.92	2.07	1.41	0.12	8.5	6.0	0.82	.181	1.22	5.35
9	Christy Mathewson C. Mathewson	9	August 1903	1	.900	10	10		71	8	0	0	83.1	85		35	1	19	3	0		358	4	7.67	2.05	3.74	0.11	19.8	5.3	1.25	.318	3.78	9.18
10	Rube Waddell R. Waddell	9	September 1902	2	.818	11	9	2.09	54	8	0	0	86.0	79		29	2	20	4	2			4	5.65	2.09	2.70	0.21		6.8	1.15	.360	3.03	8.27
11	Rube Waddell R. Waddell	9	July 1902	1	.900	12	9	2.26	85	9	1	0	99.2	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
12	Mitch Williams M. Williams	8	August 1991	1	.889	15	0	1.21	22	0	0	5	22.1	10	3	3	0	16	3	13	1	95	0	8.87	6.45	1.38	0.00	23.2	16.8	1.16	.185	1.21	4.03
13	Wilbur Wood W. Wood	8	May 1973	1	.889	9	8	2.00	48	5	2	0	76.1	64	17	19	3	15	0	1	0	305	0	5.66	1.77	3.20	0.35	15.7	4.9	1.03	.255	2.24	7.55
14	Pat Dobson P. Dobson	8	July 1971	0	1.000	8	8	1.13	55	8	3	0	72.0	46	9	10	2	12	0	0	1	270	1	6.88	1.50	4.58	0.25	20.4	4.4	0.81	.219	1.25	5.75
15	Whitey Ford W. Ford	8	June 1961	0	1.000	8	8	2.94	55	3	0	0	64.1	43	21	22	7	21	0	0	0	255	3	7.69	2.94	2.62	0.98	21.6	8.2	0.99	.209	3.08	6.02
16	Hank Wyse H. Wyse	8	July 1945	1	.889	9	9	1.84	19	8	0	0	78.1	68	16	19	1	10	0	0		306	0	2.18	1.15	1.90	0.11	6.2	3.3	1.00	.243	2.18	7.81
17	Hal Newhouser H. Newhouser	8	September 1944	1	.889	9	8	1.68	57	8	3	0	75.0	56	14	15	2	18	0	1		295	0	6.84	2.16	3.17	0.24	19.3	6.1	0.99	.248	1.80	6.72
18	Dizzy Trout D. Trout	8	August 1944	0	1.000	10	8	1.75	36	8	3	0	72.0	67	14	18	1	17	1	1		297	0	4.50	2.13	2.12	0.13	12.1	5.7	1.17	.273	2.25	8.38
19	Paul Derringer P. Derringer	8	September 1939	0	1.000	8	8	2.22	35	8	1	0	73.0	81	18	23	3	10	1	0		311	0	4.32	1.23	3.50	0.37	11.3	3.2	1.25	.298	2.84	9.99
20	Bucky Walters B. Walters	8	July 1939	1	.889	9	8	1.71	30	8	2	0	73.2	43	14	14	3	20	0	1		275	1	3.67	2.44	1.50	0.37	10.9	7.3	0.86	.180	1.71	5.25
21	Schoolboy Rowe S. Rowe	8	July 1934	0	1.000	11	5	2.33	34	3	0	0	58.0	51	15	17	1	20	0	6		240	1	5.28	3.10	1.70	0.16	14.2	8.3	1.22	.270	2.64	7.91
22	Alvin Crowder A. Crowder	8	September 1932	0	1.000	8	8	2.29	13	7	0	0	70.2	48	18	19	4	16	0	0		275	0	1.66	2.04	0.81	0.51	4.7	5.8	0.91	.182	2.42	6.11
23	Monte Weaver M. Weaver	8	July 1932	0	1.000	9	7	3.70	21	4	0	0	56.0	49	23	24	2	21	0	1		234	0	3.38	3.38	1.00	0.32	9.0	9.0	1.25	.247	3.86	7.88
24	Ray Kremer R. Kremer	8	September 1927	0	1.000	9	7	0.93	20	7	3	1	67.2	46	7	8	1	9	0	2		249	0	2.66	1.20	2.22	0.13	8.0	3.6	0.81	.205	1.06	6.12
25	Urban Shocker U. Shocker	8	August 1921	1	.889	10	10	3.14	37	9	0	0	83.0	90	29	35	2	22	2	0		359	1	4.01	2.39	1.68	0.22	10.3	6.1	1.35	.297	3.80	9.76