Since 1920, Grover Alexander has won the most games in a month, with 9 wins in May 1920.

Interpreted as:

most wins by a player in a month since 1920

	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	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	Red Faber R. Faber	8	May 1921	2	.800	10	9	2.39	20	7	1	0	67.2	61	18	22	1	22	4	1		279	0	2.66	2.93	0.91	0.13	7.2	7.9	1.23	.259	2.93	8.11
17	Carl Mays C. Mays	8	July 1920	0	1.000	9	8	2.91	16	6	2	0	65.0	64	21	24	5	10	2	1		264	0	2.22	1.38	1.60	0.69	6.1	3.8	1.14	.255	3.32	8.86
18	Chuck Finley C. Finley	7	July 1997	0	1.000	7	7	2.26	58	2	1	0	51.2	42	13	13	2	19	0	0	0	205	3	10.10	3.31	3.05	0.35	28.3	9.3	1.18	.317	2.26	7.32
19	Bret Saberhagen B. Saberhagen	7	August 1989	0	1.000	7	7	1.58	36	3	1	0	57.0	42	10	11	5	5	0	0	0	213	2	5.68	0.79	7.20	0.79	16.9	2.3	0.82	.222	1.74	6.63
20	Pascual Perez P. Perez	7	September 1987	0	1.000	7	7	2.28	43	2	0	0	51.1	37	13	14	4	11	1	0	0	195	0	7.54	1.93	3.91	0.70	22.1	5.6	0.94	.243	2.45	6.49
21	LaMarr Hoyt L. Hoyt	7	September 1983	0	1.000	7	7	2.83	24	3	1	0	54.0	41	17	18	8	5	0	0	1	199	0	4.00	0.83	4.80	1.33	12.1	2.5	0.85	.204	3.00	6.83
22	Rick Reuschel R. Reuschel	7	August 1979	0	1.000	7	7	1.63	42	2	0	0	55.1	48	10	11	4	16	1	0	1	225	0	6.83	2.60	2.63	0.65	18.7	7.1	1.16	.272	1.79	7.81
23	Ed Figueroa E. Figueroa	7	September 1978	0	1.000	8	8	2.44	23	3	1	0	59.0	45	16	16	8	19	0	0	0	234	1	3.51	2.90	1.21	1.22	9.8	8.1	1.08	.201	2.44	6.86
24	Bob Stanley B. Stanley	7	August 1978	1	.875	10	1	2.72	11	0	0	0	36.1	35	11	14	1	10	0	8	3	151	0	2.72	2.48	1.10	0.25	7.3	6.6	1.24	.264	3.47	8.67
25	Mike Marshall M. Marshall	7	June 1974	1	.875	18	0	3.03	20	0	0	2	29.2	29	10	11	1	6	0	12	0	122	0	6.07	1.82	3.33	0.30	16.4	4.9	1.18	.295	3.34	8.80