Yasmani Grandal and AJ Pollock were tied for the most RBIs in a game in 2021, with 8 RBIs.

Interpreted as:

most rbis by a player in a single regular-season game 2021

	NAME	RBI	DATE	TM		OPP	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP
1	Yasmani Grandal Y. Grandal	8	8/27/2021	CWS	vs	CHC	6	2	4	1	0	2	0	0	0	0	0	6	11	3	0	0	0	0
2	AJ Pollock	8	5/2/2021	LAD	@	MIL	6	2	3	1	0	2	0	0	1	0	0	6	10	3	0	0	0	0
3	Brandon Lowe B. Lowe	7	10/2/2021	TBR	@	NYY	5	3	3	0	0	3	0	0	1	0	0	5	12	3	0	0	0	0
4	Lourdes Gurriel Jr. L. Gurriel Jr.	7	9/12/2021	TOR	@	BAL	3	5	2	0	0	2	3	0	1	0	0	6	8	2	0	0	0	0
5	Bobby Dalbec B. Dalbec	7	8/26/2021	BOS	vs	MIN	4	3	3	0	0	2	0	0	0	0	0	4	9	2	0	0	0	0
6	C.J. Cron	7	8/8/2021	COL	vs	MIA	4	2	2	0	0	2	0	0	1	0	0	4	8	2	0	0	0	0
7	Dansby Swanson D. Swanson	7	7/31/2021	ATL	vs	MIL	4	2	3	0	0	2	0	0	0	0	0	4	9	2	0	0	0	0
8	Wil Myers W. Myers	7	7/16/2021	SDP	@	WSH	6	3	3	0	0	2	0	0	2	0	0	6	9	2	0	0	0	0
9	Ozzie Albies O. Albies	7	6/30/2021	ATL	vs	NYM	6	4	5	0	0	2	0	0	1	1	1	6	11	2	0	0	0	0
10	Nick Castellanos N. Castellanos	7	6/28/2021	CIN	vs	PHI	5	2	3	1	0	1	0	0	2	0	0	5	7	2	0	0	0	0
11	Eduardo Escobar E. Escobar	7	5/15/2021	ARI	vs	WSH	5	3	3	0	0	2	0	0	1	0	0	5	9	2	0	0	0	0
12	Matt Beaty M. Beaty	7	5/2/2021	LAD	@	MIL	6	3	4	0	0	1	0	0	1	0	0	6	7	1	0	0	0	0
13	Vladimir Guerrero Jr. V. Guerrero Jr.	7	4/27/2021	TOR	vs	WSH	4	3	3	0	0	3	0	0	0	0	0	4	12	3	0	0	0	1
14	David Peralta D. Peralta	7	4/22/2021	ARI	@	CIN	6	2	5	0	1	1	0	0	0	0	0	6	10	2	0	0	0	1
15	Adam Duvall A. Duvall	7	4/13/2021	MIA	@	ATL	5	4	4	1	0	2	0	0	1	0	0	5	11	3	0	0	0	0
16	Tyler Naquin T. Naquin	7	4/6/2021	CIN	vs	PIT	4	2	3	0	0	2	1	0	0	0	0	5	9	2	0	0	0	0
17	Mitch Haniger M. Haniger	6	9/27/2021	SEA	vs	OAK	5	2	2	0	0	2	0	0	1	0	0	5	8	2	0	0	0	0
18	Gary Sánchez G. Sánchez	6	9/5/2021	NYY	vs	BAL	4	2	2	0	0	2	0	0	0	0	0	4	8	2	0	0	0	0
19	Kyle Seager K. Seager	6	9/4/2021	SEA	@	ARI	5	2	2	0	0	2	0	0	0	0	0	5	8	2	0	0	0	0
20	Nick Castellanos N. Castellanos	6	9/1/2021	CIN	vs	STL	3	3	2	0	0	2	1	0	0	0	0	4	8	2	0	0	0	0
21	Joey Wendle J. Wendle	6	8/29/2021	TBR	@	BAL	4	2	3	0	0	2	1	0	0	0	0	5	9	2	0	0	0	0
22	Pedro Severino P. Severino	6	8/26/2021	BAL	vs	LAA	5	1	2	0	0	1	0	0	1	0	0	5	5	1	0	0	0	0
23	Christian Yelich C. Yelich	6	8/21/2021	MIL	vs	WSH	5	3	3	0	0	2	0	0	0	1	0	5	9	2	0	0	0	0
24	Dansby Swanson D. Swanson	6	8/14/2021	ATL	@	WSH	5	2	3	0	0	2	0	0	0	0	0	5	9	2	0	0	0	0
25	Manny Piña M. Piña	6	8/12/2021	MIL	@	CHC	6	3	3	0	0	2	0	0	0	0	0	6	9	2	0	0	0	0