I couldn't find anything for this season, but Stone Garrett had the highest OPS after the All-Star Game in 2024, with an OPS of 2.067.

Interpreted as:

highest ops by a player after the all star break this season

	NAME	OPS	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG
1	Stone Garrett S. Garrett	2.067	2024	WSH	2	5	2	3	1	0	1	3	1	0	0	0	0	6	7	2	0	0	0	0	.600	.667	1.400
2	Duke Ellis D. Ellis	2.000	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	1.000
3	Jakson Reetz J. Reetz	1.667	2024	SFG	1	2	0	1	1	0	0	0	1	0	1	0	0	3	2	1	0	0	0	0	.500	.667	1.000
4	Dustin Harris D. Harris	1.429	2024	TEX	2	6	1	2	1	0	1	3	1	0	2	0	0	7	6	2	0	0	0	0	.333	.429	1.000
5	Diego Castillo D. Castillo	1.350	2024	MIN	3	4	2	2	1	0	0	2	1	0	1	0	0	5	3	1	0	0	0	0	.500	.600	.750
6	Luis Urías L. Urías	1.300	2024	SEA	7	15	3	6	3	0	1	4	2	1	3	0	0	18	12	4	0	0	0	0	.400	.500	.800
7	Aaron Judge A. Judge	1.233	2024	NYY	62	216	49	75	12	0	24	59	61	3	65	5	0	280	159	36	0	0	14	8	.347	.496	.736
8	Blake Dunn B. Dunn	1.194	2024	CIN	7	8	4	3	0	0	1	1	1	0	4	2	0	9	6	1	0	0	0	0	.375	.444	.750
9	Zack Short Z. Short	1.167	2024	ATL	4	3	1	1	1	0	0	0	1	0	2	0	0	5	2	1	1	0	0	0	.333	.500	.667
10	Darren Baker D. Baker	1.143	2024	WSH	9	14	1	7	2	0	0	0	0	0	3	0	0	14	9	2	0	0	0	0	.500	.500	.643
11	Vladimir Guerrero Jr. V. Guerrero Jr.	1.127	2024	TOR	63	242	50	91	23	1	16	46	31	3	28	0	2	278	164	40	0	2	11	7	.376	.450	.678
12	Austin Shenton A. Shenton	1.100	2024	TBR	2	5	0	2	1	0	0	0	1	0	1	0	0	6	3	1	0	0	0	1	.400	.500	.600
13	Ketel Marte K. Marte	1.066	2024	ARI	44	145	29	42	4	0	17	38	25	2	36	1	0	174	97	21	0	2	2	2	.290	.397	.669
14	Bobby Witt Jr. B. Witt Jr.	1.054	2024	KCR	64	249	50	86	20	2	16	46	29	4	35	9	3	284	158	38	0	2	5	2	.345	.419	.635
15	Iván Herrera I. Herrera	1.042	2024	STL	18	57	13	21	6	0	2	8	10	0	12	1	0	67	33	8	0	0	0	1	.368	.463	.579
16	Kyle Tucker K. Tucker	1.041	2024	HOU	18	63	14	23	2	0	4	9	10	1	13	1	0	75	37	6	0	1	2	0	.365	.453	.587
17	Shohei Ohtani S. Ohtani	1.037	2024	LAD	65	266	59	80	15	3	25	61	30	3	69	36	1	301	176	43	0	2	5	1	.301	.375	.662
18	Yordan Alvarez Y. Alvarez	1.035	2024	HOU	56	211	32	69	13	1	16	34	28	2	35	1	0	242	132	30	0	1	7	5	.327	.409	.626
19	Randal Grichuk R. Grichuk	1.012	2024	ARI	44	107	20	33	9	0	9	25	10	0	21	0	0	117	69	18	0	0	0	1	.308	.368	.645
20	Ryan Bliss R. Bliss	1.000	2024	SEA	3	5	2	1	0	0	1	2	0	0	2	0	0	5	4	1	0	0	0	0	.200	.200	.800
21	Juan Soto J. Soto	.995	2024	NYY	63	234	53	65	16	1	18	43	50	2	49	2	2	286	137	35	0	0	2	4	.278	.409	.585
22	Yasmani Grandal Y. Grandal	.987	2024	PIT	29	86	16	26	4	0	6	10	19	0	23	0	0	107	48	10	2	0	0	2	.302	.429	.558
23	Joc Pederson J. Pederson	.968	2024	ARI	52	136	28	38	4	1	10	25	25	9	35	3	3	170	74	15	0	0	2	3	.279	.424	.544
24	Alex Call A. Call	.967	2024	WSH	23	83	9	29	8	0	3	13	9	0	14	4	1	92	46	11	0	0	0	2	.349	.413	.554
25	Jonatan Clase J. Clase	.966	2024	TOT	9	23	3	8	1	0	1	2	2	2	4	0	1	27	12	2	0	0	0	0	.348	.444	.522