C.J. Cron had the most ribbies in a month in 2021, with 34 RBIs in August 2021.

Interpreted as:

most rbi by a player in a month in 2021

	NAME	RBI	MONTH	G	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	C.J. Cron	34	August 2021	26	93	18	36	8	0	11	13	1	21	0	0	108	77	19	0	1	2	3	.387	.463	.828	1.291
2	Lourdes Gurriel Jr. L. Gurriel Jr.	30	September 2021	24	85	18	28	6	2	7	9	0	18	0	1	95	59	15	0	1	0	0	.329	.389	.694	1.084
3	Kyle Schwarber K. Schwarber	30	June 2021	27	100	22	28	0	0	16	13	1	33	0	0	116	76	16	0	2	0	3	.280	.362	.760	1.122
4	Eric Haase E. Haase	29	July 2021	23	83	17	22	3	0	9	6	1	26	0	0	91	52	12	0	1	0	2	.265	.319	.627	.945
5	Ozzie Albies O. Albies	29	June 2021	28	112	18	36	10	2	6	8	0	24	8	2	120	68	18	0	0	0	1	.321	.367	.607	.974
6	Salvador Perez S. Perez	28	August 2021	27	97	15	26	1	0	12	10	3	25	0	0	112	63	13	0	2	1	3	.268	.348	.649	.998
7	Austin Meadows A. Meadows	28	May 2021	26	97	19	25	9	1	8	14	1	29	1	0	112	60	18	0	0	1	1	.258	.357	.619	.976
8	Andrew Benintendi A. Benintendi	27	September 2021	28	108	10	37	8	1	5	9	0	17	0	1	119	62	14	0	2	0	0	.343	.387	.574	.961
9	Tyler O'Neill T. O'Neill	27	September 2021	29	109	27	33	6	0	11	8	1	38	4	0	119	72	17	0	1	0	3	.303	.353	.661	1.013
10	Salvador Perez S. Perez	27	September 2021	28	109	23	31	5	0	10	7	1	28	0	0	118	66	15	0	1	1	2	.284	.331	.606	.936
11	Eloy Jiménez E. Jiménez	27	August 2021	27	108	15	31	6	0	7	6	1	25	0	0	116	58	13	0	1	0	2	.287	.328	.537	.865
12	Jorge Polanco J. Polanco	27	August 2021	26	103	19	30	5	1	9	8	1	28	1	1	114	64	15	0	2	0	2	.291	.342	.621	.963
13	Jonathan Schoop J. Schoop	27	June 2021	26	106	19	36	8	0	10	6	2	18	1	0	116	74	18	0	2	0	3	.340	.379	.698	1.077
14	José Abreu J. Abreu	27	May 2021	25	84	16	28	5	1	6	9	6	24	0	0	102	53	12	0	3	0	2	.333	.422	.631	1.053
15	Adolis García A. García	27	May 2021	28	109	17	34	2	0	11	6	0	30	5	0	115	69	13	0	0	0	3	.312	.348	.633	.981
16	Teoscar Hernández T. Hernández	26	September 2021	28	103	27	31	6	0	9	9	5	26	2	0	118	64	15	0	1	0	0	.301	.381	.621	1.003
17	Aaron Judge A. Judge	26	August 2021	29	110	18	39	6	0	8	16	0	33	4	1	128	69	14	0	2	1	1	.355	.430	.627	1.057
18	Brandon Lowe B. Lowe	26	August 2021	27	107	24	28	9	0	9	10	1	26	2	0	119	64	18	0	1	0	1	.262	.328	.598	.926
19	Ryan Mountcastle R. Mountcastle	26	June 2021	26	101	17	33	4	0	9	8	1	26	0	1	110	64	13	0	0	0	2	.327	.382	.634	1.015
20	Fernando Tatis Jr. F. Tatis Jr.	26	May 2021	20	68	21	24	5	0	9	13	0	18	8	1	84	56	14	0	3	4	2	.353	.440	.824	1.264
21	Giancarlo Stanton G. Stanton	25	September 2021	25	98	11	28	3	0	10	6	0	28	0	0	105	61	13	0	1	0	4	.286	.324	.622	.946
22	Francisco Lindor F. Lindor	25	September 2021	27	101	21	27	4	0	9	15	0	27	0	2	117	58	13	0	1	2	2	.267	.359	.574	.933
23	Nick Castellanos N. Castellanos	25	September 2021	25	98	19	28	5	0	9	7	0	17	1	0	108	60	14	0	3	1	5	.286	.324	.612	.936
24	Matt Olson M. Olson	25	September 2021	27	95	18	25	6	0	6	21	0	20	0	0	120	49	12	0	4	5	1	.263	.383	.516	.899
25	Austin Riley A. Riley	25	September 2021	26	107	16	32	9	0	5	4	1	32	0	0	113	56	14	0	1	0	1	.299	.327	.523	.851