Jose Reyes is the youngest in a game with more than 0 grand slams. He was 20 years and 4 days old versus the Anaheim Angels on June 15, 2003.

Interpreted as:

youngest players to hit a grand slam in a regular-season game

	NAME	AGE	GRANDSLAM	DATE	TM		OPP	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP
1	Jose Reyes J. Reyes	20-004	1	6/15/2003	NYM	@	ANA	4	1	3	0	0	1	5	0	0	0	1	0	4	6	1	0	0	0	0
2	Jackson Chourio J. Chourio	20-109	1	6/28/2024	MIL	vs	CHC	3	1	2	0	0	1	4	0	0	0	0	0	3	5	1	0	0	0	0
3	Vladimir Guerrero Jr. V. Guerrero Jr.	20-126	1	7/20/2019	TOR	@	DET	4	1	2	0	0	1	4	0	0	1	0	0	4	5	1	0	0	0	0
4	Andruw Jones A. Jones	20-130	1	8/31/1997	ATL	@	BOS	3	1	3	0	0	1	5	1	0	0	0	0	5	6	1	0	1	0	0
5	Vladimir Guerrero Jr. V. Guerrero Jr.	20-136	1	7/30/2019	TOR	@	KCR	5	1	2	0	0	1	5	0	0	1	0	0	5	5	1	0	0	0	0
6	Butch Wynegar B. Wynegar	20-138	1	7/30/1976	MIN	vs	OAK	2	1	1	0	0	1	4	2	0	0	0	0	4	4	1	0	0	0	0
7	Jackson Chourio J. Chourio	20-175	1	9/2/2024	MIL	vs	STL	2	2	1	0	0	1	4	3	0	0	0	0	5	4	1	0	0	0	0
8	Rougned Odor R. Odor	20-205	1	8/27/2014	TEX	@	SEA	4	1	1	0	0	1	4	0	0	0	0	0	4	4	1	0	0	0	0
9	Giancarlo Stanton G. Stanton	20-222	1	6/18/2010	FLA	vs	TBR	4	1	2	0	0	1	4	0	0	1	0	0	4	5	1	0	0	0	0
10	Jackson Holliday J. Holliday	20-240	1	7/31/2024	BAL	vs	TOR	5	1	1	0	0	1	4	0	0	1	0	0	5	4	1	0	0	0	0
11	Alex Rodriguez A. Rodriguez	20-266	1	4/18/1996	SEA	vs	DET	4	1	2	0	0	1	4	0	0	1	0	0	4	5	1	0	0	0	0
12	Alex Rodriguez A. Rodriguez	20-295	1	5/17/1996	SEA	@	BAL	6	2	3	1	0	1	6	0	0	1	0	0	6	7	2	0	0	0	1
13	Orlando Mercado O. Mercado	20-316	1	9/19/1982	SEA	vs	TEX	4	1	1	0	0	1	4	0	0	0	0	0	4	4	1	0	0	0	0
14	Alex Rodriguez A. Rodriguez	20-345	1	7/6/1996	SEA	@	TEX	5	1	2	0	0	1	4	0	0	0	0	0	5	5	1	0	0	0	0
15	Kevin Bell K. Bell	20-345	1	6/22/1976	CWS	@	KCR	5	3	3	1	0	1	4	0	0	1	0	0	5	7	2	0	0	0	0
16	Rick Manning R. Manning	20-361	1	8/29/1975	CLE	vs	MIN	1	2	1	0	0	1	4	2	0	0	0	0	5	4	1	2	0	0	0
17	Adrian Beltre A. Beltre	21-044	1	5/21/2000	LAD	@	FLA	6	2	3	2	0	1	4	0	0	0	0	0	6	8	3	0	0	0	0
18	Adrian Beltre A. Beltre	21-111	1	7/27/2000	LAD	@	COL	6	2	4	0	0	1	6	0	0	0	0	0	6	7	1	0	0	0	0
19	Ozzie Albies O. Albies	21-123	1	5/10/2018	ATL	@	MIA	6	1	2	0	0	1	5	0	0	1	0	0	6	5	1	0	0	0	0
20	Jackson Holliday J. Holliday	21-133	1	4/16/2025	BAL	vs	CLE	4	1	1	0	0	1	4	0	0	1	0	0	4	4	1	0	0	0	0
21	Jay Bruce J. Bruce	21-155	1	9/5/2008	CIN	vs	CHC	3	2	2	1	0	1	4	1	0	0	0	0	4	6	2	0	0	0	0
22	Ozzie Albies O. Albies	21-156	1	6/12/2018	ATL	vs	NYM	5	1	1	0	0	1	4	0	0	0	0	0	5	4	1	0	0	0	0
23	Ronald Acuña Jr. R. Acuña Jr.	21-174	1	6/10/2019	ATL	vs	PIT	5	1	1	0	0	1	4	0	0	3	0	0	5	4	1	0	0	0	0
24	Rafael Devers R. Devers	21-176	1	4/18/2018	BOS	@	LAA	5	1	2	1	0	1	4	0	0	2	0	0	5	6	2	0	0	0	0
25	Isaac Paredes I. Paredes	21-185	1	8/21/2020	DET	@	CLE	4	1	1	0	0	1	4	0	0	3	0	0	4	4	1	0	0	0	0