Chuck Nevitt has the highest usage percentage + assist percentage in a season, with 153.78 in 1993-94.

Interpreted as:

most usg%+ast% by a player in a season

	NAME	USG%+AST%	USG%	AST%	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	Chuck Nevitt C. Nevitt	153.78	153.8	0.0	1993-94	SAS	1	1.0	3.0	1.0	0.0	0.0	0.0	0.0	0.0		0.0	0.0		3.0	6.0	50.0	56.8	1.0	0.0	1.0	1	3	1	0	0	0	1	1
2	Walker Russell W. Russell	142.04	42.0	100.0	1987-88	DET	1	1.0	0.0	0.0	1.0	0.0	0.0	0.0	1.0	0.0	0.0	1.0	0.0	0.0	0.0		0.0	0.0	0.0	0.0	1	0	0	1	0	0	0	0
3	Darrell Armstrong D. Armstrong	129.24	53.2	76.1	1994-95	ORL	3	2.7	3.3	0.3	1.0	0.3	0.0	1.0	2.7	37.5	0.7	2.0	33.3	0.7	0.7	100.0	56.3	0.3	0.0	0.3	8	10	1	3	1	0	1	3
4	Jamal Crawford J. Crawford	128.11	28.1	100.0	2019-20	BKN	1	6.0	5.0	0.0	3.0	0.0	0.0	2.0	4.0	50.0	1.0	2.0	50.0	0.0	0.0		62.5	0.0	0.0	0.0	6	5	0	3	0	0	0	1	+4
5	Tyson Wheeler T. Wheeler	127.44	27.4	100.0	1998-99	DEN	1	3.0	4.0	0.0	2.0	0.0	0.0	1.0	1.0	100.0	1.0	1.0	100.0	1.0	2.0	50.0	106.4	0.0	0.0	0.0	3	4	0	2	0	0	0	1	+4
6	Leonard Miller L. Miller	121.92	21.9	100.0	2023-24	MIN	1	2.0	2.0	2.0	1.0	0.0	0.0	1.0	1.0	100.0	0.0	0.0		0.0	0.0		100.0	0.0	2.0	0.0	2	2	2	1	0	0	0	0	+3
7	Sim Bhullar S. Bhullar	108.21	29.7	78.5	2014-15	SAC	3	1.0	0.7	0.3	0.3	0.0	0.3	0.3	0.7	50.0	0.0	0.0		0.0	0.0		50.0	0.0	0.3	0.0	3	2	1	1	0	1	0	0	+1
8	Geert Hammink G. Hammink	108.07	43.1	64.9	1993-94	ORL	1	3.0	2.0	1.0	1.0	0.0	0.0	1.0	3.0	33.3	0.0	0.0		0.0	0.0		33.3	1.0	0.0	0.0	3	2	1	1	0	0	0	1
9	Paul Davis P. Davis	101.18	27.4	73.8	2009-10	WAS	2	4.0	2.5	0.0	1.5	0.0	0.5	1.0	2.0	50.0	0.0	0.0		0.5	1.0	50.0	51.2	0.0	0.0	0.0	8	5	0	3	0	1	0	0	+1
10	Russell Westbrook R. Westbrook	98.82	41.5	57.3	2016-17	OKC	81	34.6	31.6	10.7	10.4	1.6	0.4	10.2	24.0	42.5	2.5	7.2	34.3	8.8	10.4	84.5	55.4	1.7	9.0	5.4	2,802	2,558	864	840	132	31	438	190	+251
11	Jared Harper J. Harper	93.88	29.8	64.1	2021-22	NOP	5	8.6	7.4	0.4	2.8	0.8	0.2	2.8	5.2	53.8	1.0	2.4	41.7	0.8	0.8	100.0	66.6	0.4	0.0	0.4	43	37	2	14	4	1	2	5	+7
12	Everette Stephens E. Stephens	93.18	27.4	65.7	1990-91	MIL	3	2.0	2.0	0.0	0.7	0.0	0.0	0.7	1.0	66.7	0.0	0.0		0.7	0.7	100.0	77.3	0.0	0.0	0.0	6	6	0	2	0	0	0	0
13	Ben Davis B. Davis	90.1	47.1	43.0	1998-99	NYK	8	2.6	2.1	1.4	0.4	0.0	0.0	0.9	2.1	41.2	0.0	0.0		0.4	0.8	50.0	43.3	1.1	0.3	0.1	21	17	11	3	0	0	1	4	+7
14	Gheorghe Muresan G. Muresan	89.09	89.1	0.0	1998-99	NJN	1	1.0	0.0	0.0	0.0	0.0	0.0	0.0	1.0	0.0	0.0	0.0		0.0	0.0		0.0	0.0	0.0	1.0	1	0	0	0	0	0	1	0	-4
15	Elmer Bennett E. Bennett	88.55	42.0	46.5	1994-95	CLE	4	4.5	3.8	0.3	0.8	1.0	0.0	1.5	2.8	54.5	0.0	0.5	0.0	0.8	1.0	75.0	58.8	0.0	0.3	0.8	18	15	1	3	4	0	3	3
16	Howard Nathan H. Nathan	87.77	56.3	31.5	1995-96	ATL	5	3.0	2.6	0.0	0.4	0.6	0.0	1.0	1.8	55.6	0.0	0.2	0.0	0.6	0.8	75.0	60.4	0.0	0.0	1.6	15	13	0	2	3	0	8	2
17	Alondes Williams A. Williams	86.31	21.3	65.0	2024-25	DET	1	4.0	5.0	0.0	1.0	0.0	0.0	2.0	2.0	100.0	1.0	1.0	100.0	0.0	0.0		125.0	0.0	0.0	0.0	4	5	0	1	0	0	0	0	+6
18	Russell Westbrook R. Westbrook	85.22	38.2	47.0	2014-15	OKC	67	34.4	28.1	7.3	8.6	2.1	0.2	9.4	22.0	42.6	1.3	4.3	29.9	8.1	9.8	83.5	53.6	1.9	5.4	4.4	2,302	1,886	488	574	140	14	293	184	+247
19	James Harden J. Harden	84.77	34.0	50.7	2016-17	HOU	81	36.4	29.1	8.1	11.2	1.5	0.5	8.3	18.9	44.0	3.2	9.3	34.7	9.2	10.9	84.7	61.3	1.2	7.0	5.7	2,947	2,356	659	907	121	38	464	215	+425
20	Claude Gregory C. Gregory	84.41	84.4	0.0	1985-86	WAS	2	1.0	1.0	1.0	0.0	0.5	0.0	0.5	1.0	50.0	0.0	0.0		0.0	0.0		50.0	1.0	0.0	1.0	2	2	2	0	1	0	2	1
21	Vinny Del Negro V. Del Negro	84.35	30.1	54.3	2001-02	PHX	2	3.0	1.0	0.0	1.0	0.0	0.0	0.5	2.0	25.0	0.0	0.0		0.0	0.0		25.0	0.0	0.0	0.0	6	2	0	2	0	0	0	0	-1
22	Russell Westbrook R. Westbrook	83.89	34.1	49.8	2017-18	OKC	80	36.4	25.4	10.1	10.3	1.8	0.3	9.5	21.1	44.9	1.2	4.1	29.8	5.2	7.1	73.7	52.4	1.9	8.2	4.8	2,914	2,028	804	820	147	20	381	200	+383
23	Luka Dončić L. Dončić	83.28	37.3	46.0	2021-22	DAL	65	35.4	28.4	9.1	8.7	1.2	0.6	9.9	21.6	45.7	3.1	8.8	35.3	5.6	7.5	74.4	57.1	0.9	8.3	4.5	2,301	1,847	593	568	75	36	292	145	+146
24	Luka Dončić L. Dončić	82.26	36.6	45.7	2019-20	DAL	61	33.6	28.8	9.4	8.8	1.0	0.2	9.5	20.6	46.3	2.8	8.9	31.6	7.0	9.2	75.8	58.5	1.3	8.1	4.3	2,047	1,759	573	538	62	14	260	153	+253
25	Kasparas Jakučionis K. Jakučionis	82.16	82.2	0.0	2025-26	MIA	1	1.0	0.0	0.0	0.0	1.0	0.0	0.0	2.0	0.0	0.0	0.0		0.0	0.0		0.0	0.0	0.0	0.0	1	0	0	0	1	0	0	0	-2