James Harden has the most games with 9+ turnovers in a season, with 8 games in 2016-17.

who has the most games with 9+ turnovers in a season

NAME	GP	TOV	SEASON	TM	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	PF	+/-
James Harden	8	80	2016-17	HOU	37.0	28.9	9.1	12.3	1.9	0.6	10.0	7.9	16.4	48.1	3.0	7.5	40.0	10.1	11.1	91.0	296	231	73	98	15	5	25	+33
Russell Westbrook	6	60	2016-17	OKC	35.8	33.2	11.8	10.2	1.7	0.3	10.0	11.2	25.7	43.5	1.5	8.2	18.4	9.3	11.0	84.8	215	199	71	61	10	2	20	-14
James Harden	5	47	2018-19	HOU	42.2	43.8	8.0	10.8	1.8	0.4	9.4	12.2	26.2	46.6	6.4	14.6	43.8	13.0	16.0	81.3	211	219	40	54	9	2	19	+41
Allen Iverson	5	50	2004-05	PHI	43.6	33.6	4.4	7.4	2.8	0.2	10.0	10.2	24.8	41.1	1.6	6.0	26.7	11.6	13.2	87.9	218	168	22	37	14	1	13	-41
Jerry Stackhouse	5	48	2000-01	DET	41.2	30.4	6.4	7.6	0.8	0.4	9.6	9.0	18.2	49.5	3.2	5.8	55.2	9.2	10.4	88.5	206	152	32	38	4	2	10	+13
Trae Young	4	38	2022-23	ATL	37.3	25.3	3.3	12.5	2.8	0.0	9.5	6.5	14.5	44.8	2.5	6.3	40.0	9.8	11.3	86.7	149	101	13	50	11	0	6	-3
Russell Westbrook	4	37	2017-18	OKC	37.5	24.3	10.5	9.3	1.5	0.5	9.3	10.3	21.8	47.1	0.3	4.3	5.9	3.5	4.8	73.7	150	97	42	37	6	2	12	+10
James Harden	4	37	2015-16	HOU	38.5	37.0	6.8	8.3	1.5	0.3	9.3	10.5	23.0	45.7	4.3	10.3	41.5	11.8	14.0	83.9	154	148	27	33	6	1	11	+6
Jason Kidd	4	43	2002-03	NJN	42.5	22.3	8.5	8.3	4.8	0.5	10.8	7.8	23.0	33.7	1.0	6.8	14.8	5.8	7.3	79.3	170	89	34	33	19	2	10	-3
Allen Iverson	4	37	1996-97	PHI	39.3	27.8	3.3	6.8	2.8	0.3	9.3	9.8	19.8	49.4	2.5	6.3	40.0	5.8	7.8	74.2	157	111	13	27	11	1	16	+7
Kevin Johnson	4	39	1989-90	PHX	42.5	34.8	5.8	9.5	0.8	0.3	9.8	8.8	19.5	44.9	0.0	0.3	0.0	17.3	18.5	93.2	170	139	23	38	3	1	11
Charles Oakley	4	37	1986-87	CHI	40.5	21.5	13.5	2.3	0.8	0.0	9.3	8.5	15.3	55.7	0.0	1.0	0.0	4.5	6.5	69.2	162	86	54	9	3	0	18
Russell Westbrook	3	28	2021-22	LAL	35.0	17.7	8.0	10.3	2.0	0.3	9.3	6.7	17.0	39.2	1.0	5.7	17.6	3.3	5.0	66.7	105	53	24	31	6	1	12	-22
James Harden	3	31	2019-20	HOU	36.2	33.7	10.0	11.3	2.3	0.3	10.3	9.0	19.3	46.6	4.3	10.7	40.6	11.3	13.0	87.2	109	101	30	34	7	1	10	+22
Russell Westbrook	3	29	2018-19	OKC	39.1	29.0	13.3	10.0	2.3	0.3	9.7	11.0	23.7	46.5	2.7	7.0	38.1	4.3	6.7	65.0	117	87	40	30	7	1	11	+5
Ben Simmons	3	29	2018-19	PHI	36.2	16.0	9.0	9.0	1.0	0.0	9.7	6.3	11.3	55.9	0.0	0.3	0.0	3.3	5.0	66.7	109	48	27	27	3	0	8	-22
James Harden	3	28	2017-18	HOU	35.0	29.3	5.7	10.0	1.7	1.0	9.3	9.0	20.7	43.5	2.3	8.3	28.0	9.0	9.3	96.4	105	88	17	30	5	3	9	+15
John Wall	3	29	2016-17	WAS	38.8	25.0	4.3	11.0	3.3	0.7	9.7	9.3	17.7	52.8	1.0	3.3	30.0	5.3	6.7	80.0	117	75	13	33	10	2	7	-8
Russell Westbrook	3	28	2014-15	OKC	39.0	30.3	9.3	10.0	2.0	0.3	9.3	8.7	21.3	40.6	2.3	6.3	36.8	10.7	12.7	84.2	117	91	28	30	6	1	9	-17
LeBron James	3	27	2014-15	CLE	40.6	23.0	8.0	8.7	2.7	0.7	9.0	7.3	16.7	44.0	1.7	5.7	29.4	6.7	10.0	66.7	122	69	24	26	8	2	10	+31
DeMarcus Cousins	3	27	2014-15	SAC	35.5	25.3	11.7	5.3	2.0	1.3	9.0	9.3	16.3	57.1	0.0	0.0		6.7	7.7	87.0	106	76	35	16	6	4	13	-10
Kobe Bryant	3	28	2014-15	LAL	34.3	20.0	7.0	9.0	2.0	0.3	9.3	6.0	17.3	34.6	2.3	5.3	43.8	5.7	6.7	85.0	103	60	21	27	6	1	6	+10
Monta Ellis	3	29	2009-10	GSW	47.8	30.7	4.3	6.0	2.7	0.3	9.7	12.0	28.0	42.9	0.3	2.3	14.3	6.3	8.3	76.0	143	92	13	18	8	1	12	-10
Kevin Johnson	3	28	1990-91	PHX	40.3	25.0	6.3	11.3	2.0	1.3	9.3	7.0	17.3	40.4	0.0	1.0	0.0	11.0	12.7	86.8	121	75	19	34	6	4	9
Patrick Ewing	3	27	1988-89	NYK	40.3	19.3	10.0	2.0	1.0	4.0	9.0	8.0	15.3	52.2	0.0	0.0		3.3	5.3	62.5	121	58	30	6	3	12	12