I don't have anything for this season, but Stone Garrett had the highest slugging percentage after the All-Star Game in 2024, with a slugging percentage of 1.400.

Interpreted as:

best slugging by a player since all star break this season

	NAME	SLG	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	OPS
1	Stone Garrett S. Garrett	1.400	2024	WSH	2	5	2	3	1	0	1	3	1	0	0	0	0	6	7	2	0	0	0	0	.600	.667	2.067
2	Dustin Harris D. Harris	1.000	2024	TEX	2	6	1	2	1	0	1	3	1	0	2	0	0	7	6	2	0	0	0	0	.333	.429	1.429
3	Duke Ellis D. Ellis	1.000	2024	NYY	3	1	0	1	0	0	0	0	0	0	0	1	0	1	1	0	0	0	0	0	1.000	1.000	2.000
4	Jakson Reetz J. Reetz	1.000	2024	SFG	1	2	0	1	1	0	0	0	1	0	1	0	0	3	2	1	0	0	0	0	.500	.667	1.667
5	Luis Urías L. Urías	.800	2024	SEA	7	15	3	6	3	0	1	4	2	1	3	0	0	18	12	4	0	0	0	0	.400	.500	1.300
6	Ryan Bliss R. Bliss	.800	2024	SEA	3	5	2	1	0	0	1	2	0	0	2	0	0	5	4	1	0	0	0	0	.200	.200	1.000
7	Blake Dunn B. Dunn	.750	2024	CIN	7	8	4	3	0	0	1	1	1	0	4	2	0	9	6	1	0	0	0	0	.375	.444	1.194
8	Diego Castillo D. Castillo	.750	2024	MIN	3	4	2	2	1	0	0	2	1	0	1	0	0	5	3	1	0	0	0	0	.500	.600	1.350
9	Aaron Judge A. Judge	.736	2024	NYY	62	216	49	75	12	0	24	59	61	3	65	5	0	280	159	36	0	0	14	8	.347	.496	1.233
10	Vladimir Guerrero Jr. V. Guerrero Jr.	.678	2024	TOR	63	242	50	91	23	1	16	46	31	3	28	0	2	278	164	40	0	2	11	7	.376	.450	1.127
11	Ketel Marte K. Marte	.669	2024	ARI	44	145	29	42	4	0	17	38	25	2	36	1	0	174	97	21	0	2	2	2	.290	.397	1.066
12	Zack Short Z. Short	.667	2024	ATL	4	3	1	1	1	0	0	0	1	0	2	0	0	5	2	1	1	0	0	0	.333	.500	1.167
13	Shohei Ohtani S. Ohtani	.662	2024	LAD	65	266	59	80	15	3	25	61	30	3	69	36	1	301	176	43	0	2	5	1	.301	.375	1.037
14	Randal Grichuk R. Grichuk	.645	2024	ARI	44	107	20	33	9	0	9	25	10	0	21	0	0	117	69	18	0	0	0	1	.308	.368	1.012
15	Darren Baker D. Baker	.643	2024	WSH	9	14	1	7	2	0	0	0	0	0	3	0	0	14	9	2	0	0	0	0	.500	.500	1.143
16	Luisangel Acuña L. Acuña	.641	2024	NYM	14	39	6	12	2	1	3	6	1	0	6	0	1	40	25	6	0	0	0	1	.308	.325	.966
17	Bobby Witt Jr. B. Witt Jr.	.635	2024	KCR	64	249	50	86	20	2	16	46	29	4	35	9	3	284	158	38	0	2	5	2	.345	.419	1.054
18	Yordan Alvarez Y. Alvarez	.626	2024	HOU	56	211	32	69	13	1	16	34	28	2	35	1	0	242	132	30	0	1	7	5	.327	.409	1.035
19	Kerry Carpenter K. Carpenter	.605	2024	DET	37	119	16	34	6	1	10	28	11	1	37	0	1	132	72	17	0	1	0	3	.286	.348	.954
20	Eugenio Suárez E. Suárez	.602	2024	ARI	65	251	51	77	14	0	20	53	14	2	70	0	1	273	151	34	0	6	0	6	.307	.341	.942
21	Austin Shenton A. Shenton	.600	2024	TBR	2	5	0	2	1	0	0	0	1	0	1	0	0	6	3	1	0	0	0	1	.400	.500	1.100
22	Jackson Merrill J. Merrill	.596	2024	SDP	61	223	37	70	19	4	12	44	14	0	40	6	1	243	133	35	2	4	0	1	.314	.349	.945
23	Kyle Tucker K. Tucker	.587	2024	HOU	18	63	14	23	2	0	4	9	10	1	13	1	0	75	37	6	0	1	2	0	.365	.453	1.041
24	Byron Buxton B. Buxton	.587	2024	MIN	30	109	19	29	8	0	9	18	9	3	29	2	0	121	64	17	0	0	1	0	.266	.339	.926
25	Juan Soto J. Soto	.585	2024	NYY	63	234	53	65	16	1	18	43	50	2	49	2	2	286	137	35	0	0	2	4	.278	.409	.995