Rick Barry has posted the most points by a 21-year-old player in a game, with 57 points against the Knicks on December 14, 1965.

Interpreted as:

most points by a player in a regular-season game with 21 years old

	NAME	PTS	AGE	DATE	TM		OPP	MIN	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Rick Barry R. Barry	57	21-261	12/14/1965	SFW	@	NYK	44	15	3			18	29	62.1				21	22	95.5	73.7				5
2	LeBron James L. James	51	21-022	1/21/2006	CLE	@	UTA	43	5	8	2	0	19	35	54.3	4	8	50.0	9	11	81.8	64.0	0	5	3	4	+19
3	Paolo Banchero P. Banchero	50	21-351	10/28/2024	ORL	vs	IND	40	13	9	1	2	16	26	61.5	3	9	33.3	15	22	68.2	70.1	4	9	4	4	+3
4	Trae Young T. Young	50	21-154	2/20/2020	ATL	vs	MIA	40	2	8	2	1	12	25	48.0	8	15	53.3	18	19	94.7	74.9	0	2	7	4	+10
5	Allen Iverson A. Iverson	50	21-309	4/12/1997	PHI	@	CLE	46	5	6	2	0	17	32	53.1	5	9	55.6	11	18	61.1	62.6	2	3	9	5	-4
6	Jamal Mashburn J. Mashburn	50	21-348	11/12/1994	DAL	@	CHI	43	10	2	0	0	19	31	61.3	3	3	100.0	9	13	69.2	68.1	5	5	8	4
7	Trae Young T. Young	49	21-071	11/29/2019	ATL	@	IND	43	1	6	2	0	16	28	57.1	8	15	53.3	9	9	100.0	76.7	0	1	9	1	+1
8	Tracy McGrady T. McGrady	49	21-324	4/13/2001	ORL	@	WAS	44	8	7	2	4	19	31	61.3	2	5	40.0	9	14	64.3	65.9	3	5	6	3	+3
9	Antoine Walker A. Walker	49	21-148	1/7/1998	BOS	@	WAS	42	12	0	1	0	21	36	58.3	5	5	100.0	2	7	28.6	62.7	2	10	5	6	+2
10	Shaquille O'Neal S. O'Neal	49	21-278	12/9/1993	ORL	@	IND	45	11	3	2	0	17	25	68.0	0	0		15	18	83.3	74.4	3	8	2	3
11	Michael Jordan M. Jordan	49	21-361	2/12/1985	CHI	vs	DET	45	15	5	4	0	19	31	61.3	0	0		11	13	84.6	66.7	7	8	6	5
12	Trae Young T. Young	48	21-143	2/9/2020	ATL	vs	NYK	48	1	13	2	0	13	30	43.3	6	13	46.2	16	16	100.0	64.8	0	1	7	1	+10
13	Jamal Murray J. Murray	48	21-255	11/5/2018	DEN	vs	BOS	38	5	4	0	0	19	30	63.3	5	11	45.5	5	5	100.0	74.5	1	4	5	1	-4
14	Charlie Villanueva C. Villanueva	48	21-214	3/26/2006	TOR	@	MIL	46	9	3	1	0	20	32	62.5	6	11	54.5	2	3	66.7	72.0	4	5	3	4	-6
15	Cam Thomas C. Thomas	47	21-116	2/6/2023	BKN	vs	LAC	39	4	3	0	0	15	29	51.7	7	11	63.6	10	11	90.9	69.4	1	3	4	3	+3
16	Trae Young T. Young	47	21-093	12/21/2019	ATL	@	BKN	40	8	6	1	0	14	30	46.7	3	12	25.0	16	19	84.2	61.3	1	7	5	1	+5
17	Karl-Anthony Towns K. Towns	47	21-015	11/30/2016	MIN	vs	NYK	42	18	2	1	3	15	22	68.2	0	3	0.0	17	20	85.0	76.3	3	15	4	2	+7
18	Andrew Wiggins A. Wiggins	47	21-264	11/13/2016	MIN	vs	LAL	41	4	3	0	1	14	21	66.7	2	5	40.0	17	22	77.3	76.6	1	3	2	2	+34
19	Blake Griffin B. Griffin	47	21-307	1/17/2011	LAC	vs	IND	37	14	3	0	1	19	24	79.2	0	0		9	11	81.8	81.5	3	11	4	3	+17
20	LeBron James L. James	47	21-092	4/1/2006	CLE	vs	MIA	45	12	9	2	0	16	25	64.0	2	6	33.3	13	14	92.9	75.4	4	8	4	3	+13
21	LeBron James L. James	47	21-072	3/12/2006	CLE	@	MIA	45	7	4	0	1	11	27	40.7	1	6	16.7	24	28	85.7	59.8	2	5	5	2	-7
22	Cam Thomas C. Thomas	46	21-178	4/9/2023	BKN	vs	PHI	43	2	1	1	1	16	29	55.2	6	8	75.0	8	8	100.0	70.7	0	2	4	1	-20
23	RJ Barrett	46	21-256	2/25/2022	NYK	vs	MIA	38	9	2	0	0	13	22	59.1	6	11	54.5	14	22	63.6	72.6	0	9	3	5	-3
24	Luka Dončić L. Dončić	46	21-350	2/12/2021	DAL	vs	NOP	40	8	12	1	1	17	30	56.7	5	8	62.5	7	9	77.8	67.7	1	7	3	4	+13
25	Jamal Murray J. Murray	46	21-309	12/29/2018	DEN	@	PHX	40	6	8	0	1	16	24	66.7	9	11	81.8	5	6	83.3	86.3	0	6	5	2	+6