Bryce Harper launched his most homers in a month in May 2015, with 13 home runs.

	NAME	HR	MONTH	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Bryce Harper B. Harper	13	May 2015	26	86	24	31	4	1	28	22	1	17	2	1	109	76	18	0	0	1	4	.360	.495	.884	1.379
2	Bryce Harper B. Harper	11	August 2019	24	94	23	26	2	0	25	14	1	26	4	0	109	61	13	0	0	1	2	.277	.376	.649	1.025
3	Bryce Harper B. Harper	10	August 2023	26	97	23	35	9	1	24	14	3	24	0	1	115	76	20	0	1	2	3	.361	.452	.784	1.236
4	Bryce Harper B. Harper	10	August 2021	28	98	25	33	11	1	25	22	1	21	0	1	124	76	22	1	2	4	1	.337	.455	.776	1.231
5	Bryce Harper B. Harper	10	May 2018	26	104	14	23	5	0	21	10	1	28	2	1	116	58	15	0	1	0	0	.221	.293	.558	.851
6	Bryce Harper B. Harper	10	September 2015	27	88	25	30	7	0	19	26	0	21	0	0	116	67	17	0	2	3	5	.341	.483	.761	1.244
7	Bryce Harper B. Harper	9	July 2017	23	90	26	34	7	1	22	13	0	17	0	0	103	70	17	0	0	0	3	.378	.456	.778	1.234
8	Bryce Harper B. Harper	9	April 2017	25	92	32	36	8	0	26	22	0	20	0	2	114	71	17	0	0	5	2	.391	.509	.772	1.281
9	Bryce Harper B. Harper	9	April 2016	23	77	16	22	6	0	24	17	0	13	5	1	96	55	15	0	2	4	1	.286	.406	.714	1.121
10	Bryce Harper B. Harper	9	April 2013	26	93	18	32	6	1	18	14	0	16	1	2	107	67	16	0	0	1	2	.344	.430	.720	1.150
11	Bryce Harper B. Harper	8	September 2021	27	89	20	27	8	0	19	25	0	27	1	1	116	59	16	1	1	5	4	.303	.452	.663	1.115
12	Bryce Harper B. Harper	8	April 2018	27	83	22	20	1	0	17	37	0	21	3	0	122	45	9	0	2	8	0	.241	.467	.542	1.009
13	Bryce Harper B. Harper	7	August 2025	29	114	14	31	5	0	18	8	1	28	1	2	124	57	12	0	1	2	2	.272	.323	.500	.823
14	Bryce Harper B. Harper	7	June 2024	23	91	20	34	10	0	16	13	0	18	1	1	104	65	17	0	0	2	3	.374	.452	.714	1.166
15	Bryce Harper B. Harper	7	May 2024	26	96	19	30	5	0	24	16	0	27	2	0	113	56	12	0	1	3	0	.313	.407	.583	.990
16	Bryce Harper B. Harper	7	May 2022	23	95	17	33	11	0	18	8	0	17	3	0	104	65	18	0	1	4	2	.347	.394	.684	1.078
17	Bryce Harper B. Harper	7	August 2014	29	104	15	29	1	0	15	9	1	37	0	0	115	51	8	0	1	0	0	.279	.339	.490	.830
18	Bryce Harper B. Harper	7	September 2012	28	106	26	35	7	3	14	11	1	24	4	1	119	69	17	1	0	0	2	.330	.398	.651	1.049
19	Bryce Harper B. Harper	6	July 2025	22	86	16	25	11	0	11	12	0	24	2	0	98	54	17	0	0	1	1	.291	.378	.628	1.005
20	Bryce Harper B. Harper	6	April 2024	25	94	12	23	5	0	18	16	0	24	0	2	111	46	11	0	1	3	6	.245	.351	.489	.841
21	Bryce Harper B. Harper	6	September 2023	27	87	18	20	4	0	17	24	1	23	4	0	113	42	10	0	1	2	1	.230	.398	.483	.881
22	Bryce Harper B. Harper	6	June 2021	20	72	14	21	2	0	10	8	2	18	3	0	82	41	8	0	0	1	2	.292	.378	.569	.947
23	Bryce Harper B. Harper	6	April 2021	23	78	17	25	5	0	10	16	2	19	2	0	96	48	11	0	0	2	2	.321	.448	.615	1.063
24	Bryce Harper B. Harper	6	September 2020	29	95	17	24	5	1	12	25	0	23	4	2	120	49	12	0	0	3	1	.253	.408	.516	.924
25	Bryce Harper B. Harper	6	August 2020	26	86	22	25	4	1	18	20	2	17	4	0	111	49	11	1	2	5	4	.291	.427	.570	.997