I don't have anything for this season, but Donovan Mitchell had the highest usage percentage for the Cavaliers against the Wizards in 2024-25, at 30.4 percent.

Interpreted as:

most usage by a player on cavs vs wizards this regular season

	NAME	USG%	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	Donovan Mitchell D. Mitchell	30.4	2024-25	CLE	4	31.4	25.5	4.0	5.8	2.5	0.0	9.0	19.3	46.8	4.5	10.3	43.9	3.0	3.5	85.7	61.3	0.3	3.8	2.5	126	102	16	23	10	0	10	7	+60
2	Darius Garland D. Garland	27.5	2024-25	CLE	4	26.5	20.5	3.0	5.3	1.5	0.0	6.8	12.5	54.0	3.5	7.0	50.0	3.5	4.0	87.5	71.9	0.5	2.5	3.5	106	82	12	21	6	0	14	10	+45
3	Evan Mobley E. Mobley	24.8	2024-25	CLE	3	32.3	19.7	10.0	2.3	0.3	1.7	6.7	13.7	48.8	0.3	2.3	14.3	6.0	7.7	78.3	57.7	1.3	8.7	2.3	97	59	30	7	1	5	7	7	+50
4	Ty Jerome T. Jerome	21.6	2024-25	CLE	3	16.8	9.7	2.3	2.3	1.7	0.0	3.3	7.0	47.6	1.0	2.3	42.9	2.0	2.3	85.7	60.2	0.7	1.7	1.0	51	29	7	7	5	0	3	6	+3
5	Caris LeVert C. LeVert	20.4	2024-25	CLE	3	23.8	11.3	2.3	4.3	0.7	1.0	3.0	7.3	40.9	1.0	3.0	33.3	4.3	7.0	61.9	54.4	0.7	1.7	1.3	71	34	7	13	2	3	4	2	+21
6	Sam Merrill S. Merrill	18.5	2024-25	CLE	3	22.2	11.3	3.7	3.0	1.3	0.3	3.7	9.3	39.3	3.3	8.3	40.0	0.7	0.7	100.0	58.9	1.3	2.3	0.3	67	34	11	9	4	1	1	7	+32
7	Jarrett Allen J. Allen	17.0	2024-25	CLE	4	27.6	16.8	7.8	2.0	1.0	1.3	6.5	8.0	81.3	0.0	0.3	0.0	3.8	5.0	75.0	82.1	1.8	6.0	1.3	110	67	31	8	4	5	5	6	+45
8	Emoni Bates E. Bates	15.6	2024-25	CLE	1	5.2	0.0	0.0	2.0	0.0	0.0	0.0	2.0	0.0	0.0	2.0	0.0	0.0	0.0		0.0	0.0	0.0	0.0	5	0	0	2	0	0	0	2	-8
9	Isaac Okoro I. Okoro	15.3	2024-25	CLE	3	24.6	8.3	4.0	1.7	1.3	1.3	2.3	6.7	35.0	1.7	3.3	50.0	2.0	2.7	75.0	53.1	2.0	2.0	1.3	74	25	12	5	4	4	4	6	+42
10	Max Strus M. Strus	14.4	2024-25	CLE	1	31.0	17.0	5.0	3.0	0.0	0.0	6.0	11.0	54.5	5.0	9.0	55.6	0.0	0.0		77.3	1.0	4.0	0.0	31	17	5	3	0	0	0	1	+9
11	Georges Niang G. Niang	14.2	2024-25	CLE	3	23.2	9.0	5.7	1.0	0.3	0.0	3.7	8.0	45.8	1.7	5.3	31.3	0.0	0.0		56.3	1.7	4.0	0.0	69	27	17	3	1	0	0	9	+29
12	Jaylon Tyson J. Tyson	13.7	2024-25	CLE	3	11.3	4.0	2.7	1.3	0.3	0.0	1.3	2.7	50.0	0.3	0.7	50.0	1.0	1.0	100.0	64.4	1.7	1.0	0.7	34	12	8	4	1	0	2	8	+6
13	Dean Wade D. Wade	13.3	2024-25	CLE	3	18.9	1.3	6.0	0.7	0.7	0.3	0.7	5.7	11.8	0.0	5.0	0.0	0.0	1.0	0.0	10.9	1.7	4.3	0.0	57	4	18	2	2	1	0	6	+12
14	Tristan Thompson T. Thompson	12.9	2024-25	CLE	4	7.7	1.5	2.3	0.5	0.0	0.3	0.8	1.3	60.0	0.0	0.3	0.0	0.0	1.5	0.0	39.3	0.8	1.5	0.5	31	6	9	2	0	1	2	4	-6
15	Craig Porter Jr. C. Porter Jr.	5.2	2024-25	CLE	3	10.6	1.3	2.0	2.7	1.0	0.7	0.7	1.3	50.0	0.0	0.0		0.0	0.0		50.0	0.7	1.3	0.0	32	4	6	8	3	2	0	0	+10