9 players were tied for stealing the most bases in a game in 2021, with 3 steals. The first three are Myles Straw on September 10, 2021, José Ramírez on August 26, 2021 and Nicky Lopez on August 16, 2021.

Interpreted as:

most stolen bases by a player in a regular-season game in 2021

	NAME	SB	DATE	TM		OPP	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	CS	PA	TB	XBH	SH	SF	IBB	GIDP
1	Myles Straw M. Straw	3	9/10/2021	CLE	vs	MIL	3	1	0	0	0	0	0	2	0	1	0	5	0	0	0	0	0	0
2	José Ramírez J. Ramírez	3	8/26/2021	CLE	vs	TEX	3	3	2	0	0	0	1	2	0	0	0	5	2	0	0	0	0	0
3	Nicky Lopez N. Lopez	3	8/16/2021	KCR	vs	HOU	3	2	1	0	0	0	0	1	0	0	0	5	1	0	1	0	0	0
4	Starling Marte S. Marte	3	8/1/2021	OAK	@	LAA	4	2	3	0	0	0	0	1	0	0	0	5	3	0	0	0	0	0
5	Bryce Harper B. Harper	3	7/23/2021	PHI	vs	ATL	3	1	2	1	0	0	0	1	0	1	0	4	3	1	0	0	0	0
6	Whit Merrifield W. Merrifield	3	6/19/2021	KCR	vs	BOS	3	0	1	0	0	0	0	1	0	1	0	4	1	0	0	0	0	0
7	Isiah Kiner-Falefa I. Kiner-Falefa	3	6/12/2021	TEX	@	LAD	5	2	3	1	0	0	1	0	0	1	0	6	4	1	0	1	0	0
8	Wil Myers W. Myers	3	4/24/2021	SDP	@	LAD	4	1	1	0	0	0	0	0	0	1	0	4	1	0	0	0	0	0
9	Garrett Hampson G. Hampson	3	4/7/2021	COL	vs	ARI	3	3	2	0	0	0	1	2	0	0	0	5	2	0	0	0	0	0
10	Bradley Zimmer B. Zimmer	2	10/3/2021	CLE	@	TEX	4	1	2	0	0	0	1	0	0	0	0	4	2	0	0	0	0	0
11	Jack Mayfield J. Mayfield	2	10/3/2021	LAA	@	SEA	4	0	2	0	0	0	1	1	0	1	0	5	2	0	0	0	0	0
12	Randy Arozarena R. Arozarena	2	10/2/2021	TBR	@	NYY	4	2	3	1	0	0	0	2	0	1	0	6	4	1	0	0	0	0
13	Starling Marte S. Marte	2	10/1/2021	OAK	@	HOU	4	2	1	0	0	0	0	0	1	1	0	5	1	0	0	0	0	0
14	Rafael Ortega R. Ortega	2	9/30/2021	CHC	@	PIT	4	2	2	0	0	1	1	1	0	0	0	5	5	1	0	0	0	0
15	Shohei Ohtani S. Ohtani	2	9/29/2021	LAA	@	TEX	5	1	2	0	0	0	0	0	0	1	0	5	2	0	0	0	0	0
16	Harrison Bader H. Bader	2	9/25/2021	STL	@	CHC	4	3	4	1	0	1	2	0	0	0	0	4	8	2	0	0	0	0
17	Tyler Wade T. Wade	2	9/22/2021	NYY	vs	TEX	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
18	Tommy Edman T. Edman	2	9/21/2021	STL	@	MIL	3	1	2	0	0	0	1	1	0	1	0	4	2	0	0	0	0	0
19	Adalberto Mondesi A. Mondesi	2	9/20/2021	KCR	@	CLE	3	1	1	0	0	0	0	0	0	1	0	3	1	0	0	0	0	0
20	Isiah Kiner-Falefa I. Kiner-Falefa	2	9/19/2021	TEX	vs	CWS	3	1	2	0	0	0	1	1	0	0	0	4	2	0	0	0	0	0
21	Cedric Mullins C. Mullins	2	9/18/2021	BAL	@	BOS	4	1	2	1	0	0	0	1	0	0	0	5	3	1	0	0	0	0
22	Cedric Mullins C. Mullins	2	9/10/2021	BAL	vs	TOR	4	2	2	0	0	1	1	1	0	1	0	5	5	1	0	0	0	0
23	José Ramírez J. Ramírez	2	9/10/2021	CLE	vs	MIL	2	1	0	0	0	0	0	2	0	0	0	4	0	0	0	0	0	0
24	Dylan Moore D. Moore	2	9/10/2021	SEA	vs	ARI	2	1	1	0	0	0	0	1	0	0	0	3	1	0	0	0	0	0
25	Javier Báez J. Báez	2	9/9/2021	NYM	@	MIA	3	2	2	1	0	1	1	1	0	0	0	4	6	2	0	0	0	0