I couldn't find anything for this season, but Kawhi Leonard had the highest plus/minus in his last 15 games in 2024-25, at +139.

Interpreted as:

highest +- by a player last 15 games this season

	NAME	+/-	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF
1	Kawhi Leonard K. Leonard	+139	2024-25	LAC	15	36.4	25.8	7.0	3.9	1.7	0.6	9.8	18.4	53.3	2.4	5.4	44.4	3.8	4.6	82.6	63.2	1.1	5.9	2.0	546	387	105	59	26	9	30	24
2	Jayson Tatum J. Tatum	+134	2024-25	BOS	15	37.9	26.1	9.9	5.9	1.3	0.7	8.8	20.7	42.6	3.2	9.7	33.1	5.3	6.2	84.9	55.7	0.9	9.1	2.7	568	391	149	89	20	10	40	34
3	Jrue Holiday J. Holiday	+130	2024-25	BOS	15	32.0	11.1	4.4	4.1	0.8	0.1	4.0	8.2	48.8	1.7	3.7	44.6	1.4	1.7	80.8	61.7	1.5	2.9	1.3	480	166	66	62	12	2	20	33
4	Chet Holmgren C. Holmgren	+115	2024-25	OKC	15	29.7	14.8	8.1	1.0	0.7	1.5	5.5	11.2	48.8	0.9	3.3	26.0	3.0	4.0	75.0	57.1	1.9	6.3	1.2	446	222	122	15	10	23	18	31
5	Alperen Sengun A. Sengun	+109	2024-25	HOU	15	33.8	20.4	10.2	4.9	1.3	0.7	8.0	17.0	47.1	0.2	0.8	25.0	4.2	6.1	68.5	51.8	2.9	7.3	2.1	506	306	153	74	19	10	31	41
6	AJ Green	+109	2024-25	MIL	15	25.3	9.0	3.1	1.9	0.1	0.1	3.0	6.3	47.4	2.8	5.5	50.6	0.2	0.3	60.0	69.4	0.3	2.8	0.4	380	135	47	28	2	2	6	33
7	Jarrett Allen J. Allen	+103	2024-25	CLE	15	25.8	11.2	7.8	1.7	1.1	0.7	4.2	6.1	69.2	0.0	0.1	0.0	2.8	3.3	85.7	74.6	2.3	5.5	1.7	387	168	117	26	17	10	25	22
8	Tyrese Haliburton T. Haliburton	+102	2024-25	IND	15	32.9	17.7	5.3	7.8	1.6	0.5	6.4	13.7	46.8	2.6	7.3	35.8	2.3	2.7	85.4	59.6	0.3	5.0	2.5	493	266	79	117	24	7	38	27
9	Bobby Portis B. Portis	+99	2024-25	MIL	15	28.8	14.9	9.5	2.4	0.6	0.5	6.1	13.7	44.7	1.5	4.5	34.3	1.1	1.3	84.2	52.0	2.1	7.4	0.9	432	223	143	36	9	8	14	33
10	Aaron Nesmith A. Nesmith	+98	2024-25	IND	15	27.6	11.3	5.3	1.1	1.0	0.7	3.7	8.8	42.4	2.4	5.1	46.8	1.5	1.7	84.6	59.3	0.9	4.4	1.1	414	170	79	16	15	10	17	63
11	Ivica Zubac I. Zubac	+95	2024-25	LAC	15	35.6	18.6	12.2	3.3	0.6	0.7	8.2	12.1	68.0	0.0	0.0		2.2	3.3	67.3	68.9	4.1	8.1	1.3	534	279	183	49	9	10	20	30
12	Mouhamed Gueye M. Gueye	+95	2024-25	ATL	15	16.9	5.9	5.3	1.0	0.7	0.7	2.1	4.7	44.3	0.5	1.9	28.6	1.3	1.9	67.9	54.1	2.0	3.3	0.5	254	89	79	15	10	11	7	27
13	Isaac Okoro I. Okoro	+94	2024-25	CLE	15	17.8	6.3	2.3	0.7	0.7	0.1	2.5	4.9	51.4	0.9	2.4	36.1	0.4	0.6	66.7	60.9	0.8	1.5	0.4	267	95	35	11	11	1	6	24
14	Jaylen Brown J. Brown	+91	2024-25	BOS	15	33.5	21.3	6.6	3.7	0.7	0.2	7.5	16.5	45.6	1.9	5.3	35.4	4.3	5.6	77.4	56.0	1.0	5.6	3.1	503	319	99	56	11	3	47	40
15	Kevin Huerter K. Huerter	+90	2024-25	CHI	15	32.8	14.2	3.1	3.8	1.1	0.4	5.5	11.2	49.4	2.7	6.7	40.0	0.5	0.6	77.8	61.9	0.3	2.8	1.1	493	213	46	57	16	6	16	30
16	Steven Adams S. Adams	+88	2024-25	HOU	15	20.5	5.9	7.3	0.7	0.5	0.9	2.1	3.4	62.7	0.0	0.1	0.0	1.7	2.9	56.8	63.2	3.7	3.6	0.8	308	89	109	10	7	14	12	20
17	Shai Gilgeous-Alexander S. Gilgeous-Alexander	+83	2024-25	OKC	15	37.2	31.1	4.7	6.5	1.8	1.0	10.5	22.1	47.6	1.4	4.4	31.8	8.7	9.8	88.4	58.9	0.6	4.1	3.0	558	467	70	97	27	15	45	43
18	Ty Jerome T. Jerome	+83	2024-25	CLE	15	21.4	14.7	2.3	3.7	0.6	0.2	5.3	10.7	49.7	2.1	4.3	48.4	1.9	2.2	87.9	62.7	0.6	1.7	1.3	322	220	34	56	9	3	20	24
19	Amen Thompson A. Thompson	+82	2024-25	HOU	15	31.4	14.8	6.9	4.3	1.5	1.3	6.1	11.3	53.8	0.4	1.1	35.3	2.3	3.5	65.4	57.8	2.8	4.1	1.5	470	222	103	65	23	19	22	44
20	De'Andre Hunter D. Hunter	+79	2024-25	CLE	15	24.1	12.9	3.9	1.3	0.9	0.3	4.5	9.9	45.0	1.9	4.6	40.6	2.1	2.7	80.0	58.2	0.5	3.3	1.1	361	194	58	20	14	4	16	34
21	Jaden McDaniels J. McDaniels	+77	2024-25	MIN	15	33.1	14.7	5.6	1.5	1.3	0.9	5.8	11.3	51.5	1.4	3.7	38.2	1.7	1.9	89.3	60.7	1.8	3.8	1.2	497	220	84	23	19	13	18	50
22	Derrick White D. White	+77	2024-25	BOS	15	36.7	18.1	5.1	4.4	0.7	1.1	6.1	12.9	47.4	3.7	9.3	40.0	2.1	2.4	86.1	64.6	1.3	3.8	1.6	550	271	77	66	10	16	24	25
23	Bogdan Bogdanović B. Bogdanović	+75	2024-25	LAC	15	19.9	8.5	2.6	2.4	0.5	0.1	2.9	6.9	42.3	1.6	3.9	41.4	1.0	1.1	88.2	57.0	0.6	2.0	1.1	298	127	39	36	8	1	17	47
24	Bam Adebayo B. Adebayo	+75	2024-25	MIA	15	35.2	20.3	9.7	4.2	1.3	0.7	7.7	16.5	47.0	1.9	4.2	44.4	2.9	4.1	72.1	55.5	2.4	7.3	1.7	528	304	146	63	19	11	26	21
25	Tyler Herro T. Herro	+75	2024-25	MIA	15	35.3	25.6	4.6	4.5	0.9	0.1	9.1	17.3	52.9	2.8	6.5	42.9	4.5	5.0	90.7	65.8	0.7	3.9	2.9	530	384	69	68	13	1	44	23