Ricky Pierce has the most points per game by a Sixth Man of the Year in a season, with 23.0 per game in 1989-90.

Interpreted as:

highest ppg by a sixth man in a regular season by a player

NAME	PPG	SMOY	SEASON	TM	GP	MPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Ricky Pierce	23.0	1	1989-90	MIL	59	29.0	2.8	2.3	0.8	0.1	2.2	8.5	16.7	51.0	0.8	2.3	34.6	5.2	6.2	83.9	1,709	1,359	167	133	50	7	129	158
Lou Williams	22.6	1	2017-18	LAC	79	32.8	2.5	5.3	1.1	0.2	3.0	7.4	16.9	43.5	2.4	6.6	35.9	5.5	6.2	88.0	2,589	1,782	198	417	85	19	234	106	+123
Eddie Johnson	21.5	1	1988-89	PHX	70	29.2	4.4	2.3	0.7	0.1	1.7	8.7	17.5	49.7	1.0	2.5	41.3	3.1	3.6	86.8	2,043	1,504	306	162	47	7	122	198
Tyler Herro	20.7	1	2021-22	MIA	66	32.6	5.0	4.0	0.7	0.1	2.6	7.6	17.0	44.7	2.7	6.7	39.9	2.9	3.3	86.8	2,151	1,367	329	263	44	8	174	95	+240
Lou Williams	20.0	1	2018-19	LAC	75	26.6	3.0	5.4	0.8	0.1	2.4	6.5	15.2	42.5	1.4	3.9	36.1	5.7	6.5	87.6	1,993	1,498	222	402	57	11	181	80	+195
Kevin McHale	19.8	1	1984-85	BOS	79	33.6	9.0	1.8	0.4	1.5	2.0	7.7	13.4	57.0	0.0	0.1	0.0	4.5	5.9	76.0	2,653	1,565	712	141	28	120	157	234
Jason Terry	19.6	1	2008-09	DAL	74	33.7	2.4	3.4	1.3	0.3	1.6	7.3	15.8	46.3	2.3	6.2	36.6	2.7	3.0	88.0	2,491	1,447	177	251	97	20	119	141	+145
Ricky Pierce	19.5	1	1986-87	MIL	79	31.7	3.4	1.8	0.8	0.3	1.5	7.3	13.6	53.4	0.0	0.4	10.7	4.9	5.6	88.0	2,505	1,540	266	144	64	24	120	222
Manu Ginobili	19.5	1	2007-08	SAS	74	31.1	4.8	4.5	1.5	0.4	2.7	6.1	13.3	46.0	2.1	5.3	40.1	5.1	6.0	86.0	2,299	1,442	354	332	109	33	200	173	+427
Clifford Robinson	19.1	1	1992-93	POR	82	31.4	6.6	2.2	1.2	2.0	2.1	7.7	16.3	47.3	0.2	0.9	24.7	3.5	5.1	69.0	2,575	1,570	542	182	98	163	173	287
Montrezl Harrell	18.6	1	2019-20	LAC	63	27.8	7.1	1.7	0.6	1.1	1.7	7.5	12.9	58.0	0.0	0.3	0.0	3.7	5.6	65.8	1,749	1,173	445	107	39	72	108	146	+251
Jamal Crawford	18.6	1	2013-14	LAC	69	30.3	2.3	3.2	0.9	0.2	2.0	6.1	14.7	41.6	2.3	6.5	36.1	4.0	4.7	86.6	2,094	1,282	158	223	59	12	135	120	+271
Kevin McHale	18.4	1	1983-84	BOS	82	31.4	7.4	1.3	0.3	1.5	1.8	7.2	12.9	55.6	0.0	0.0	33.3	4.1	5.4	76.5	2,577	1,511	610	104	23	126	150	243
Jordan Clarkson	18.4	1	2020-21	UTA	68	26.7	4.0	2.5	0.9	0.1	1.7	6.7	15.8	42.5	3.1	8.8	34.7	1.9	2.1	89.6	1,818	1,251	274	168	61	10	115	110	+301
JR Smith	18.1	1	2012-13	NYK	80	33.5	5.3	2.7	1.3	0.3	1.7	6.6	15.6	42.2	1.9	5.5	35.6	3.0	3.9	76.2	2,678	1,446	425	218	100	24	134	226	+297
Leandro Barbosa	18.1	1	2006-07	PHX	80	32.7	2.7	4.0	1.2	0.2	1.8	6.6	13.9	47.6	2.4	5.5	43.4	2.5	2.9	84.5	2,613	1,444	214	317	96	15	146	210	+462
Jamal Crawford	18.0	1	2009-10	ATL	79	31.1	2.5	3.0	0.8	0.2	1.7	6.3	14.0	44.9	2.1	5.4	38.2	3.4	4.0	85.7	2,460	1,425	201	238	61	12	137	132	+259
Detlef Schrempf	17.3	1	1991-92	IND	80	32.6	9.6	3.9	0.8	0.5	2.4	6.2	11.6	53.6	0.3	0.9	32.4	4.6	5.5	82.8	2,605	1,380	770	312	62	37	191	286
James Harden	16.8	1	2011-12	OKC	62	31.4	4.1	3.7	1.0	0.2	2.2	5.0	10.1	49.1	1.8	4.7	39.0	5.0	6.0	84.6	1,946	1,044	252	229	62	15	137	150	+367
Dell Curry	16.3	1	1993-94	CHA	82	26.5	3.2	2.7	1.2	0.3	1.5	6.5	14.3	45.5	1.9	4.6	40.2	1.4	1.6	87.3	2,173	1,335	262	221	98	27	120	161
Eric Gordon	16.2	1	2016-17	HOU	75	31.0	2.7	2.5	0.6	0.5	1.6	5.5	13.5	40.6	3.3	8.8	37.2	2.0	2.3	84.0	2,323	1,217	201	188	48	41	121	150	+295
Detlef Schrempf	16.1	1	1990-91	IND	82	32.1	8.0	3.7	0.7	0.3	2.1	5.3	10.1	52.0	0.2	0.5	37.5	5.4	6.6	81.8	2,632	1,320	660	301	58	22	175	262
Lou Williams	15.5	1	2014-15	TOR	80	25.2	1.9	2.1	1.1	0.1	1.3	4.7	11.6	40.4	1.9	5.6	34.0	4.3	4.9	86.1	2,016	1,242	151	164	88	10	101	103	+295
Bobby Jackson	15.2	1	2002-03	SAC	59	28.4	3.7	3.1	1.2	0.1	1.8	5.8	12.4	46.4	1.5	4.0	37.9	2.1	2.5	84.6	1,676	895	219	182	71	3	106	126	+172
Ben Gordon	15.1	1	2004-05	CHI	82	24.4	2.6	2.0	0.6	0.1	2.3	5.3	12.9	41.1	1.6	4.0	40.5	2.8	3.3	86.3	2,002	1,235	215	164	53	10	186	224	+146