Pedro Ramos has given up the most home runs in a month, with 17 HR in June 1957.

	NAME	HR	MONTH	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Pedro Ramos P. Ramos	17	June 1957	8	1	3	.250	8	6.24	19	0	0	0	49.0	57	34	35	13	2	0	0	214	0	3.49	2.39	1.46	3.12	8.9	6.1	1.43	.245	6.43	10.47
2	Matthew Boyd M. Boyd	14	August 2019	6	1	2	.333	6	7.16	41	0	0	0	32.2	31	26	27	14	2	0	0	145	1	11.30	3.86	2.93	3.86	28.3	9.7	1.38	.230	7.44	8.54
3	Bert Blyleven B. Blyleven	14	May 1986	6	2	3	.400	6	6.39	35	1	0	0	43.2	51	31	33	5	1	0	1	190	0	7.21	1.03	7.00	2.89	18.4	2.6	1.28	.274	6.80	10.51
4	Phil Niekro P. Niekro	14	May 1979	8	3	4	.429	8	4.91	29	4	0	0	55.0	57	30	40	25	4	0	4	246	0	4.75	4.09	1.16	2.29	11.8	10.2	1.49	.247	6.55	9.33
5	Warren Hacker W. Hacker	14	July 1953	9	2	4	.333	7	7.06	26	2	0	0	43.1	55	34	34	11	1	2		198	2	5.40	2.28	2.36	2.91	13.1	5.6	1.52	.281	7.06	11.42
6	Lynn Nelson L. Nelson	14	June 1939	5	3	2	.600	5	5.55	13	3	0	0	35.2	48	22	26	11	0	0		165	0	3.28	2.78	1.18	3.53	7.9	6.7	1.65	.268	6.56	12.11
7	Dylan Bundy D. Bundy	13	May 2018	6	2	4	.333	6	6.12	39	1	0	0	32.1	32	22	24	10	1	0	0	138	1	10.86	2.78	3.90	3.62	28.3	7.2	1.30	.253	6.68	8.91
8	Barry Enright B. Enright	13	September 2010	6	1	5	.167	6	6.89	10	0	0	0	32.2	41	25	25	7	1	0	0	141	0	2.76	1.93	1.43	3.58	7.1	5.0	1.47	.255	6.89	11.30
9	David Hernandez D. Hernandez	13	September 2009	6	0	4	.000	6	8.67	25	0	0	0	27.0	37	26	27	14	0	0	0	134	1	8.33	4.67	1.79	4.33	18.7	10.4	1.89	.293	9.00	12.33
10	Rick Helling R. Helling	13	September 1999	6	2	3	.400	6	7.97	34	0	0	0	35.0	45	31	31	14	0	0	0	158	2	8.74	3.60	2.43	3.34	21.5	8.9	1.69	.330	7.97	11.57
11	Bill Gullickson B. Gullickson	13	June 1987	6	0	3	.000	6	7.76	14	0	0	0	29.0	39	25	27	8	1	0	1	134	1	4.34	2.48	1.75	4.03	10.4	6.0	1.62	.265	8.38	12.10
12	Don Carman D. Carman	13	June 1987	6	1	3	.250	6	7.31	14	0	0	0	32.0	41	26	30	11	0	0	0	149	0	3.94	3.09	1.27	3.66	9.4	7.4	1.63	.252	8.44	11.53
13	Bert Blyleven B. Blyleven	13	May 1987	7	3	3	.500	7	5.05	36	1	0	0	51.2	49	29	30	13	2	0	2	214	2	6.27	2.26	2.77	2.26	16.8	6.1	1.20	.240	5.23	8.54
14	Bill Travers B. Travers	13	August 1979	6	3	2	.600	6	6.19	10	1	0	0	32.0	41	22	23	7	0	0	0	141	2	2.81	1.97	1.43	3.66	7.1	5.0	1.50	.252	6.47	11.53
15	Robin Roberts R. Roberts	13	August 1963	8	3	2	.600	8	3.83	15	2	0	0	56.1	56	24	25	9	0	0	3	232	0	2.40	1.44	1.67	2.08	6.5	3.9	1.15	.221	3.99	8.95
16	Jim Bunning J. Bunning	13	July 1957	7	5	1	.833	7	3.49	32	4	0	0	59.1	49	23	24	21	3	0	2	249	1	4.85	3.19	1.52	1.97	12.9	8.4	1.18	.200	3.64	7.43
17	Warren Hacker W. Hacker	13	August 1955	7	1	4	.200	6	6.52	15	1	0	1	38.2	52	28	32	9	0	1	3	177	1	3.49	2.09	1.67	3.03	8.5	5.1	1.58	.279	7.45	12.10
18	Jim Waugh J. Waugh	13	August 1953	11	2	0	1.000	3	8.07	3	1	0	0	29.0	40	26	28	20	0	1		144	0	0.93	6.21	0.15	4.03	2.1	13.9	2.07	.250	8.69	12.41
19	Howie Pollet H. Pollet	13	July 1951	7	2	4	.333	7	4.41	16	2	0	0	51.0	64	25	27	19	0	0		223	0	2.82	3.35	0.84	2.29	7.2	8.5	1.63	.291	4.76	11.29
20	Bruce Zimmermann B. Zimmermann	12	May 2022	6	1	2	.333	6	5.85	20	0	0	0	32.1	37	21	22	5	2	0	0	133	1	5.57	1.39	4.00	3.34	15.0	3.8	1.30	.266	6.12	10.30
21	Mike Foltynewicz M. Foltynewicz	12	July 2021	4	0	3	.000	4	10.42	15	0	0	0	19.0	22	22	23	5	1	0	0	86	0	7.11	2.37	3.00	5.68	17.4	5.8	1.42	.189	10.89	10.42
22	Bronson Arroyo B. Arroyo	12	May 2017	5	1	2	.333	5	6.07	16	0	0	0	26.2	33	18	19	7	1	0	1	118	0	5.40	2.36	2.29	4.05	13.6	5.9	1.50	.256	6.41	11.14
23	James Shields J. Shields	12	August 2016	6	0	4	.000	6	11.42	17	0	0	0	26.0	46	33	34	11	5	0	0	138	1	5.88	3.81	1.55	4.15	12.3	8.0	2.19	.366	11.77	15.92
24	Marco Estrada M. Estrada	12	May 2014	6	3	1	.750	6	5.05	34	0	0	0	35.2	35	20	20	14	0	0	0	153	0	8.58	3.53	2.43	3.03	22.2	9.2	1.37	.247	5.05	8.83
25	Josh Beckett J. Beckett	12	August 2009	6	2	1	.667	6	5.03	36	0	0	0	39.1	36	22	22	11	1	0	0	161	1	8.24	2.52	3.27	2.75	22.4	6.8	1.19	.238	5.03	8.24