The Baltimore Orioles have launched the most grand slams by a team in a loss, with 2 grand slams versus the Rangers on August 6, 1986.

Interpreted as:

team most grand slam in a regular-season game in loss

	TEAM	GRANDSLAM	L	DATE	TM		OPP	W	L%	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Orioles	2	17	8/6/1986	BAL	vs	TEX	0	1.000	33	11	7	0	0	3	10	10	0	6	0	0	43	16	3	0	0	0	2	.212	.395	.485	.880
2	Astros	1	17	9/20/2025	HOU	vs	SEA	0	1.000	35	4	10	1	0	1	4	1	2	11	0	0	38	14	2	0	0	0	1	.286	.342	.400	.742
3	Rays	1	16	9/19/2025	TBR	vs	BOS	0	1.000	35	7	8	1	0	3	7	5	0	13	0	0	40	18	4	0	0	0	1	.229	.325	.514	.839
4	White Sox	1	15	8/28/2025	CWS	vs	NYY	0	1.000	33	4	5	0	0	1	4	2	1	10	0	0	36	8	1	0	0	0	0	.152	.222	.242	.465
5	Tigers	1	15	8/26/2025	DET	@	ATH	0	1.000	39	6	9	0	0	2	6	5	0	13	0	0	44	15	2	0	0	0	0	.231	.318	.385	.703
6	Nationals	1	13	8/25/2025	WSH	@	NYY	0	1.000	32	5	9	0	0	1	5	5	0	12	0	1	37	12	1	0	0	0	2	.281	.378	.375	.753
7	Pirates	1	14	8/1/2025	PIT	@	COL	0	1.000	43	16	18	2	0	2	16	9	1	9	0	0	53	26	4	0	0	0	2	.419	.528	.605	1.133
8	Mets	1	14	7/28/2025	NYM	@	SDP	0	1.000	32	6	6	1	0	2	6	5	0	15	2	0	38	13	3	0	1	1	0	.188	.289	.406	.696
9	White Sox	1	18	6/19/2025	CWS	vs	STL	0	1.000	38	6	8	1	0	2	6	5	0	9	1	0	43	15	3	0	0	1	0	.211	.302	.395	.697
10	Giants	1	15	6/14/2025	SFG	@	LAD	0	1.000	33	5	6	2	0	1	4	4	0	8	0	0	37	11	3	0	0	0	1	.182	.270	.333	.604
11	Red Sox	1	12	5/18/2025	BOS	vs	ATL	0	1.000	34	4	8	2	0	1	4	1	0	5	1	0	35	13	3	0	0	0	0	.235	.257	.382	.639
12	Orioles	1	17	5/14/2025	BAL	vs	MIN	0	1.000	37	6	11	0	0	2	6	2	0	7	0	0	39	17	2	0	0	0	1	.297	.333	.459	.793
13	Diamondbacks	1	17	5/9/2025	AZ	vs	LAD	0	1.000	38	11	11	2	0	5	11	6	1	6	0	0	45	28	7	0	0	1	0	.289	.400	.737	1.137
14	Marlins	1	19	4/28/2025	MIA	@	LAD	0	1.000	35	6	8	1	0	1	6	4	0	4	0	0	39	12	2	0	0	0	3	.229	.308	.343	.651
15	Diamondbacks	1	16	4/18/2025	AZ	@	CHC	0	1.000	43	11	15	4	0	2	11	3	0	9	0	0	46	25	6	0	0	0	0	.349	.391	.581	.973
16	Reds	1	20	4/17/2025	CIN	vs	SEA	0	1.000	37	7	10	1	0	2	7	6	0	7	1	1	44	17	3	0	1	0	1	.270	.364	.459	.823
17	Rockies	1	17	4/16/2025	COL	@	LAD	0	1.000	38	7	11	2	0	2	7	1	0	16	0	0	39	19	4	0	0	0	0	.289	.308	.500	.808
18	Diamondbacks	1	15	4/3/2025	AZ	@	NYY	0	1.000	34	7	8	3	0	1	7	5	0	9	1	0	39	14	4	0	0	0	1	.235	.333	.412	.745
19	Angels	1	13	4/2/2025	LAA	@	STL	0	1.000	33	5	6	1	0	2	5	1	2	11	0	0	36	13	3	0	0	0	0	.182	.250	.394	.644
20	Tigers	1	15	9/29/2024	DET	vs	CWS	0	1.000	31	5	6	0	0	1	5	7	0	4	0	0	38	9	1	0	0	0	1	.194	.342	.290	.632
21	Royals	1	20	9/16/2024	KCR	vs	DET	0	1.000	35	6	11	0	2	1	6	2	0	9	1	0	37	18	3	0	0	0	2	.314	.351	.514	.866
22	Yankees	1	18	9/4/2024	NYY	@	TEX	0	1.000	35	6	8	1	0	2	6	6	0	7	1	0	41	15	3	0	0	0	0	.229	.341	.429	.770
23	Reds	1	14	8/7/2024	CIN	@	MIA	0	1.000	37	4	10	3	0	1	4	4	1	8	0	0	42	16	4	0	0	0	0	.270	.357	.432	.790
24	Mets	1	16	8/3/2024	NYM	@	LAA	0	1.000	34	4	8	2	0	1	4	4	0	8	0	0	38	13	3	0	0	0	0	.235	.316	.382	.698
25	Tigers	1	14	7/21/2024	DET	@	TOR	0	1.000	32	4	6	1	0	1	4	4	0	6	1	0	36	10	2	0	0	0	0	.188	.278	.313	.590