I couldn't find anything for this season, but Anfernee Simons had the highest usage percentage for the Trail Blazers versus the Spurs in 2024-25, at 28.6 percent.

Interpreted as:

most usage by a player on blazers vs spurs 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	Anfernee Simons A. Simons	28.6	2024-25	POR	3	34.2	22.3	2.3	6.7	2.7	0.0	7.3	17.7	41.5	3.0	9.3	32.1	4.7	4.7	100.0	56.6	0.3	2.0	2.3	103	67	7	20	8	0	7	5	-32
2	Duop Reath D. Reath	27.8	2024-25	POR	2	2.3	1.5	0.0	0.5	0.0	0.0	0.5	1.5	33.3	0.5	1.5	33.3	0.0	0.0		50.0	0.0	0.0	0.0	5	3	0	1	0	0	0	0	+7
3	Dalano Banton D. Banton	26.1	2024-25	POR	3	18.7	8.3	1.7	3.3	1.0	0.0	2.7	9.0	29.6	0.7	4.0	16.7	2.3	4.0	58.3	38.7	0.7	1.0	0.3	56	25	5	10	3	0	1	1	+3
4	Shaedon Sharpe S. Sharpe	24.9	2024-25	POR	4	29.4	17.5	4.8	2.3	0.5	0.5	6.8	13.0	51.9	1.8	5.3	33.3	2.3	3.0	75.0	61.1	0.3	4.5	2.5	118	70	19	9	2	2	10	8	-7
5	Scoot Henderson S. Henderson	24.5	2024-25	POR	3	22.2	9.0	3.0	3.0	0.7	0.0	3.7	10.3	35.5	1.0	4.0	25.0	0.7	1.3	50.0	41.2	0.7	2.3	1.3	67	27	9	9	2	0	4	5	-20
6	Jerami Grant J. Grant	22.2	2024-25	POR	3	35.2	19.3	2.3	1.7	0.3	0.3	6.7	13.7	48.8	3.3	6.7	50.0	2.7	3.7	72.7	63.3	0.3	2.0	2.3	105	58	7	5	1	1	7	8	-50
7	Deni Avdija D. Avdija	22.1	2024-25	POR	3	26.0	11.7	6.0	4.3	1.0	0.0	4.0	9.3	42.9	1.0	4.3	23.1	2.7	3.7	72.7	53.3	2.3	3.7	2.0	78	35	18	13	3	0	6	2	-22
8	Deandre Ayton D. Ayton	20.3	2024-25	POR	2	29.7	17.5	9.0	1.0	1.0	0.5	8.5	13.0	65.4	0.5	2.0	25.0	0.0	0.0		67.3	2.0	7.0	1.0	59	35	18	2	2	1	2	4	-28
9	Justin Minaya J. Minaya	15.3	2024-25	POR	1	13.6	5.0	0.0	1.0	1.0	1.0	2.0	4.0	50.0	1.0	3.0	33.3	0.0	0.0		62.5	0.0	0.0	1.0	14	5	0	1	1	1	1	1	+14
10	Kris Murray K. Murray	15.2	2024-25	POR	3	12.4	6.0	2.0	1.7	0.3	0.0	2.3	3.7	63.6	0.3	1.0	33.3	1.0	1.0	100.0	73.1	0.7	1.3	0.3	37	18	6	5	1	0	1	2	+17
11	Donovan Clingan D. Clingan	14.7	2024-25	POR	4	16.6	5.8	6.3	1.3	0.8	1.3	2.5	4.3	58.8	0.5	1.3	40.0	0.3	0.3	100.0	65.9	2.8	3.5	1.3	66	23	25	5	3	5	5	15	-7
12	Rayan Rupert R. Rupert	14.6	2024-25	POR	3	11.7	2.3	0.3	1.0	1.0	0.0	1.0	3.7	27.3	0.3	1.0	33.3	0.0	0.0		31.8	0.0	0.3	0.3	35	7	1	3	3	0	1	1	+14
13	Matisse Thybulle M. Thybulle	13.6	2024-25	POR	1	21.3	6.0	4.0	2.0	1.0	0.0	2.0	6.0	33.3	2.0	4.0	50.0	0.0	0.0		50.0	0.0	4.0	1.0	21	6	4	2	1	0	1	3	-1
14	Toumani Camara T. Camara	13.4	2024-25	POR	4	33.9	8.8	8.0	2.3	0.5	1.3	3.3	8.0	40.6	1.5	5.3	28.6	0.8	1.0	75.0	51.8	2.0	6.0	2.0	136	35	32	9	2	5	8	11	-44
15	Jabari Walker J. Walker	12.0	2024-25	POR	4	12.1	5.3	2.5	0.0	0.5	0.0	2.0	2.8	72.7	0.8	1.3	60.0	0.5	0.8	66.7	85.2	0.3	2.3	0.3	48	21	10	0	2	0	1	5	+27