I don't have anything for this season, but Robert Williams III had a plus/minus of -1 against the Lakers on February 20.

Interpreted as:

robert williams plus minus game log this season

	NAME	DATE	+/-	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Robert Williams III R. Williams III	2/20/2025	-1	POR	vs	LAL	25	8	6	1	2	2	4	5	80.0	0	0		0	0		80.0	1	5	0	2
2	Robert Williams III R. Williams III	2/8/2025	+16	POR	@	MIN	8	6	4	0	0	0	3	5	60.0	0	0		0	0		60.0	1	3	0	1
3	Robert Williams III R. Williams III	2/4/2025	+19	POR	vs	IND	24	4	11	3	0	2	2	5	40.0	0	0		0	0		40.0	3	8	2	3
4	Robert Williams III R. Williams III	1/26/2025	-11	POR	vs	OKC	21	1	10	0	0	1	0	4	0.0	0	0		1	2	50.0	10.2	3	7	2	3
5	Robert Williams III R. Williams III	1/23/2025	+5	POR	@	ORL	24	8	12	0	1	4	4	6	66.7	0	0		0	0		66.7	4	8	0	2
6	Robert Williams III R. Williams III	1/21/2025	-2	POR	@	MIA	14	2	4	0	0	1	1	1	100.0	0	0		0	0		100.0	2	2	0	2
7	Robert Williams III R. Williams III	1/18/2025	-14	POR	vs	HOU	20	4	4	3	1	3	2	3	66.7	0	0		0	0		66.7	0	4	2	2
8	Robert Williams III R. Williams III	1/16/2025	-3	POR	vs	LAC	18	4	7	2	0	0	1	3	33.3	0	0		2	2	100.0	51.5	2	5	2	2
9	Robert Williams III R. Williams III	1/8/2025	+2	POR	@	NOP	16	4	6	0	1	4	2	3	66.7	0	0		0	0		66.7	1	5	0	2
10	Robert Williams III R. Williams III	12/30/2024	-4	POR	vs	PHI	11	0	1	0	0	2	0	1	0.0	0	1	0.0	0	0		0.0	0	1	1	3
11	Robert Williams III R. Williams III	12/21/2024	+9	POR	@	SAS	12	0	4	0	0	1	0	0		0	0		0	0			1	3	0	0
12	Robert Williams III R. Williams III	12/19/2024	-1	POR	vs	DEN	10	0	4	1	0	0	0	0		0	0		0	0			1	3	0	0
13	Robert Williams III R. Williams III	12/15/2024	-6	POR	@	PHX	17	8	3	1	0	0	4	4	100.0	0	0		0	0		100.0	1	2	1	2
14	Robert Williams III R. Williams III	11/25/2024	-13	POR	@	MEM	12	6	3	1	1	3	1	4	25.0	0	0		4	4	100.0	52.1	3	0	0	1
15	Robert Williams III R. Williams III	11/22/2024	-14	POR	@	HOU	17	7	6	0	1	4	3	5	60.0	0	0		1	2	50.0	59.5	2	4	0	2
16	Robert Williams III R. Williams III	11/20/2024	-15	POR	@	OKC	24	4	8	2	0	0	2	4	50.0	0	0		0	0		50.0	3	5	1	3
17	Robert Williams III R. Williams III	11/17/2024	+20	POR	vs	ATL	25	14	8	2	1	1	6	6	100.0	0	0		2	2	100.0	101.7	3	5	3	0
18	Robert Williams III R. Williams III	11/12/2024	+13	POR	vs	MIN	25	19	9	3	3	3	9	10	90.0	0	0		1	1	100.0	91.0	2	7	1	1
19	Robert Williams III R. Williams III	11/10/2024	-7	POR	vs	MEM	11	4	5	0	0	1	2	4	50.0	0	1	0.0	0	0		50.0	0	5	2	0
20	Robert Williams III R. Williams III	11/8/2024	-10	POR	@	MIN	17	13	3	2	2	1	4	5	80.0	1	1	100.0	4	4	100.0	96.2	2	1	0	0