Kobe Bryant is the youngest player off the bench in a game with 30+ points. He was 19 years and 113 days old versus the Mavericks on December 14, 1997.

who is the youngest nba player to score 30 points in a game off the bench

Interpreted as:

Who is the youngest NBA player to score 30 or more points in a regular-season game off the bench?

NAME	AGE	PTS	DATE	TM		OPP	MIN	REB	AST	STL	BLK	TOV	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	PF	+/-
Kobe Bryant	19-113	30	12/14/1997	LAL	vs	DAL	32	3	3	0	0	2	12	21	57.1	3	7	42.9	3	4	75.0	3	+13
Kobe Bryant	19-116	33	12/17/1997	LAL	@	CHI	29	3	2	0	0	0	12	20	60.0	3	5	60.0	6	9	66.7	4	0
Ricky Davis	19-224	32	5/5/1999	CHA	@	BOS	41	7	2	1	1	2	12	20	60.0	0	0		8	9	88.9	4	+18
Kevin Porter Jr.	19-296	30	2/24/2020	CLE	vs	MIA	41	8	3	3	0	2	9	18	50.0	4	7	57.1	8	10	80.0	5	+22
Myles Turner	19-304	31	1/22/2016	IND	@	GSW	28	8	0	1	2	1	12	17	70.6	0	1	0.0	7	9	77.8	3	+1
Marvin Bagley III	19-333	32	2/10/2019	SAC	vs	PHX	32	7	1	1	1	1	10	15	66.7	1	2	50.0	11	13	84.6	2	+7
Scoot Henderson	19-364	30	2/2/2024	POR	@	DEN	37	5	2	0	0	2	8	15	53.3	3	7	42.9	11	12	91.7	3	+7
Coby White	20-006	33	2/22/2020	CHI	vs	PHX	34	3	2	1	0	5	11	22	50.0	7	13	53.8	4	4	100.0	5	+7
Coby White	20-007	33	2/23/2020	CHI	vs	WAS	34	6	2	2	1	5	11	18	61.1	5	9	55.6	6	7	85.7	2	+16
Coby White	20-009	35	2/25/2020	CHI	vs	OKC	33	7	3	0	0	1	13	21	61.9	6	9	66.7	3	3	100.0	3	+15
John Drew	20-073	32	12/12/1974	ATL	vs	GSW	37	15	2	2	1		12	24	50.0				8	11	72.7	4
Cam Thomas	20-114	30	2/4/2022	BKN	@	UTA	31	2	4	1	0	2	11	19	57.9	3	7	42.9	5	6	83.3	1	-5
Josh Christopher	20-116	30	4/3/2022	HOU	vs	MIN	30	3	0	2	0	2	11	14	78.6	3	5	60.0	5	7	71.4	2	+2
Bennedict Mathurin	20-132	32	10/29/2022	IND	@	BKN	33	5	2	0	0	2	8	16	50.0	6	9	66.7	10	10	100.0	4	+9
Bennedict Mathurin	20-143	30	11/9/2022	IND	vs	DEN	25	2	0	1	0	4	10	17	58.8	6	9	66.7	4	6	66.7	3	+5
Rashard Lewis	20-185	30	2/9/2000	SEA	@	DAL	34	12	0	2	2	0	13	20	65.0	0	1	0.0	4	6	66.7	3	+9
Tyler Herro	20-205	30	8/12/2020	MIA	@	OKC	38	6	2	1	1	1	9	16	56.3	3	6	50.0	9	9	100.0	2	-8
Andris Biedrins	20-236	31	11/24/2006	GSW	@	DEN	31	10	3	0	1	7	14	17	82.4	0	0		3	4	75.0	3	-1
Zach LaVine	20-323	35	1/27/2016	MIN	vs	OKC	29	2	1	1	0	0	14	17	82.4	5	8	62.5	2	5	40.0	5	-4
Tony Wroten	20-329	30	3/8/2014	PHI	vs	UTA	31	1	1	4	0	3	12	15	80.0	0	2	0.0	6	8	75.0	0	-19
Cliff Robinson	20-339	36	2/15/1981	NJN	vs	GSW	33	11	3	1	1	2	17	28	60.7	0	0		2	3	66.7	3
Cliff Robinson	20-348	32	2/24/1981	NJN	@	DEN	35	11	0	1	0	3	15	25	60.0	0	0		2	5	40.0	2
Skal Labissiere	20-362	32	3/15/2017	SAC	@	PHX	30	11	0	2	0	3	11	15	73.3	1	1	100.0	9	11	81.8	2	+8
Gary Trent Jr.	21	30	1/18/2020	POR	@	OKC	36	5	1	3	1	0	12	18	66.7	5	9	55.6	1	2	50.0	3	+7
Josh Jackson	21-035	36	3/17/2018	PHX	vs	GSW	36	6	4	2	1	4	14	23	60.9	2	4	50.0	6	8	75.0	2	-6