Detlef Schrempf has made the most free throws by a player off the bench in a season, with 431 made in 1990-91.

which nba player has the most free throws made off the bench in a season

NAME	FTM	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Detlef Schrempf	431	1990-91	IND	79	31.8	16.1	8.0	3.6	0.7	0.3	2.2	5.2	10.1	51.8	0.2	0.5	36.8	6.7	81.6	2,515	1,269	635	286	54	21	171	252
Lou Williams	421	2018-19	LAC	74	26.6	20.1	2.9	5.4	0.7	0.1	2.4	6.5	15.2	42.6	1.4	3.9	36.0	6.5	87.5	1,965	1,485	217	397	54	9	175	77	+225
Ricky Pierce	420	1990-91	TOT	76	27.5	20.5	2.4	2.1	0.8	0.2	1.8	7.2	14.8	48.5	0.6	1.5	40.4	6.0	91.5	2,089	1,556	182	161	60	13	140	164
Lou Williams	399	2016-17	TOT	80	24.6	17.6	2.5	3.0	1.0	0.3	2.0	5.3	12.3	43.0	2.0	5.5	36.5	5.7	88.1	1,971	1,408	200	238	79	20	159	91	+60
John Drew	377	1983-84	UTA	77	21.6	17.3	4.0	1.6	1.1	0.0	2.3	6.2	12.9	47.7	0.0	0.2	17.6	6.3	78.2	1,661	1,330	309	127	83	2	180	196
Kobe Bryant	360	1997-98	LAL	78	26.0	15.4	3.1	2.5	0.9	0.5	2.0	4.9	11.5	42.8	0.9	2.8	33.6	5.8	79.6	2,026	1,203	238	197	73	39	156	176	+267
Sarunas Marciulionis	355	1991-92	GSW	67	29.3	19.3	2.8	3.2	1.6	0.1	2.6	7.0	12.7	54.7	0.0	0.1	30.0	6.7	78.7	1,960	1,292	190	217	107	10	177	221
Detlef Schrempf	347	1991-92	IND	76	32.4	17.2	9.6	3.9	0.8	0.5	2.4	6.2	11.4	53.8	0.3	0.9	31.9	5.5	82.6	2,459	1,305	730	298	58	36	181	271
Thurl Bailey	342	1988-89	UTA	79	33.8	19.3	5.5	1.7	0.6	1.1	2.6	7.5	15.6	48.1	0.0	0.1	40.0	5.3	82.2	2,673	1,528	434	135	46	86	203	181
Jeff Ruland	342	1981-82	WAS	82	27.1	14.4	9.3	1.6				5.1	9.1	56.1	0.0			5.5	75.5	2,224	1,183	762	134				318
Lou Williams	340	2014-15	TOR	80	25.2	15.5	1.9	2.1	1.1	0.1	1.3	4.7	11.6	40.4	1.9	5.6	34.0	4.9	86.1	2,016	1,242	151	164	88	10	101	103	+295
Bill Cartwright	327	1987-88	NYK	78	20.4	11.2	4.7	1.0	0.6	0.5	1.6	3.5	6.5	53.9	0.0	0.0		5.3	79.2	1,590	871	367	81	43	42	126	218
Donald Royal	318	1992-93	ORL	77	21.2	9.2	3.8	1.0	0.5	0.3	1.5	2.5	5.1	49.6	0.0	0.0	0.0	5.1	81.5	1,636	706	295	80	36	25	113	179
Bill Hanzlik	318	1985-86	DEN	79	25.1	12.5	3.3	4.0	1.4	0.2	2.1	4.2	9.4	44.7	0.1	0.5	20.0	5.1	78.5	1,982	988	264	316	107	16	162	277
Lou Williams	316	2017-18	LAC	60	31.5	21.9	2.5	5.3	0.9	0.2	2.7	7.2	16.4	43.9	2.2	6.3	34.8	6.1	86.8	1,892	1,311	151	317	55	14	164	83	+79
Thurl Bailey	312	1987-88	UTA	72	34.3	20.4	6.8	1.9	0.6	1.6	2.1	8.0	15.9	50.4	0.0	0.0	33.3	5.2	83.2	2,471	1,469	487	140	42	114	151	163
Jerry Reynolds	308	1990-91	ORL	71	22.9	13.3	3.7	2.5	1.2	0.7	2.2	4.4	9.9	44.4	0.1	0.4	29.0	5.4	80.2	1,626	941	261	180	84	48	153	113
Johnny Newman	307	1997-98	DEN	59	28.6	14.9	1.7	1.8	1.1	0.3	2.0	4.6	10.5	43.6	0.5	1.4	36.6	6.4	81.9	1,688	879	100	104	62	19	117	158	-371
Ricky Pierce	307	1989-90	MIL	59	29.0	23.0	2.8	2.3	0.8	0.1	2.2	8.5	16.7	51.0	0.8	2.3	34.6	6.2	83.9	1,709	1,359	167	133	50	7	129	158
James Harden	304	2011-12	OKC	60	31.1	16.9	4.1	3.6	1.0	0.3	2.2	5.0	10.1	49.5	1.8	4.7	39.3	6.0	84.7	1,864	1,014	244	218	58	15	131	142	+387
Lou Williams	304	2008-09	PHI	81	23.7	12.8	2.0	3.0	1.0	0.2	1.9	4.1	10.4	39.8	0.8	2.7	28.6	4.8	79.0	1,919	1,039	165	242	85	14	151	128	-61
Kevin McHale	303	1983-84	BOS	72	30.4	18.6	7.3	1.3	0.3	1.6	1.8	7.2	12.6	57.4	0.0	0.0	33.3	5.5	77.1	2,189	1,342	527	96	18	114	132	201
Sarunas Marciulionis	296	1989-90	GSW	72	22.0	11.6	2.9	1.6	1.3	0.1	1.8	3.7	7.2	50.9	0.1	0.5	21.6	5.3	78.1	1,585	832	208	112	92	7	131	222
Isaiah Thomas	295	2014-15	TOT	66	25.6	16.3	2.3	4.2	0.8	0.1	2.2	5.0	11.8	42.0	1.9	5.1	37.4	5.1	87.0	1,687	1,075	150	279	56	5	143	147	+168
Detlef Schrempf	295	1989-90	IND	60	31.6	15.8	7.5	3.2	0.8	0.2	2.0	5.3	10.4	50.9	0.2	0.6	40.0	6.0	81.5	1,898	945	450	192	46	9	122	199