Udonis Haslem is the oldest player off the bench in a game with 20+ points. He was 42 years and 304 days old against the Magic on April 9, 2023.

who is the oldest nba player to score 20 points in a game off the bench

Interpreted as:

Who is the oldest NBA player to score 20 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	+/-
Udonis Haslem	42-304	24	4/9/2023	MIA	vs	ORL	25	3	0	0	1	1	9	17	52.9	3	7	42.9	3	3	100.0	3	+1
Vince Carter	42-037	21	3/4/2019	ATL	@	MIA	26	4	1	1	0	0	7	14	50.0	7	11	63.6	0	0		1	+1
Vince Carter	41-337	21	12/29/2018	ATL	vs	CLE	23	4	0	1	0	1	7	11	63.6	4	7	57.1	3	4	75.0	4	-1
Vince Carter	41-002	21	1/28/2018	SAC	@	SAS	27	6	1	1	1	0	7	12	58.3	5	7	71.4	2	3	66.7	3	+5
Vince Carter	40-335	24	12/27/2017	SAC	vs	CLE	30	5	3	1	1	1	10	12	83.3	4	5	80.0	0	0		1	+21
Manu Ginobili	40-163	26	1/7/2018	SAS	@	POR	27	4	2	1	2	2	9	16	56.3	6	9	66.7	2	3	66.7	1	-3
Manu Ginobili	40-161	21	1/5/2018	SAS	vs	PHX	19	1	3	2	1	1	7	10	70.0	3	4	75.0	4	4	100.0	3	-2
Vince Carter	39-293	20	11/14/2016	MEM	@	UTA	31	7	2	1	0	3	6	11	54.5	3	5	60.0	5	6	83.3	3	+8
Vince Carter	39-287	20	11/8/2016	MEM	vs	DEN	31	3	5	0	2	0	8	13	61.5	3	7	42.9	1	2	50.0	3	-3
Michael Jordan	39-282	28	11/26/2002	WAS	vs	IND	34	1	2	3	0	1	10	21	47.6	3	3	100.0	5	8	62.5	2	+2
Michael Jordan	39-279	20	11/23/2002	WAS	@	MEM	32	6	5	2	0	3	9	18	50.0	0	0		2	2	100.0	1	-6
Michael Jordan	39-268	27	11/12/2002	WAS	vs	SEA	31	6	4	1	1	4	13	22	59.1	0	0		1	2	50.0	1	+8
Michael Jordan	39-264	25	11/8/2002	WAS	vs	LAL	30	3	3	2	0	2	9	14	64.3	0	0		7	12	58.3	4	-7
Michael Jordan	39-258	21	11/2/2002	WAS	vs	NJN	27	2	2	2	0	0	7	16	43.8	1	2	50.0	6	8	75.0	2	+1
Michael Jordan	39-256	21	10/31/2002	WAS	vs	BOS	21	4	5	2	1	0	8	15	53.3	0	0		5	5	100.0	1	+29
Patrick Ewing	39-101	22	11/14/2001	ORL	@	PHX	30	15	1	0	0	3	10	16	62.5	0	0		2	2	100.0	1	+18
Clifford Robinson	39-042	22	1/27/2006	NJN	@	POR	23	4	0	1	0	0	8	10	80.0	4	5	80.0	2	2	100.0	1	+10
Michael Jordan	39-040	34	3/29/2002	WAS	vs	MIL	26	3	1	0	0	0	12	22	54.5	0	0		10	12	83.3	1	-7
Jamal Crawford	39-020	51	4/9/2019	PHX	@	DAL	38	5	5	1	1	4	18	30	60.0	7	13	53.8	8	9	88.9	4	-5
Jamal Crawford	39-018	27	4/7/2019	PHX	@	HOU	27	4	6	1	0	2	9	17	52.9	4	8	50.0	5	5	100.0	0	-20
Jamal Crawford	39-016	28	4/5/2019	PHX	vs	NOP	34	2	7	3	0	3	9	21	42.9	4	9	44.4	6	6	100.0	0	-3
Kyle Korver	38-358	23	3/9/2020	MIL	@	DEN	24	4	4	1	1	2	8	15	53.3	5	11	45.5	2	3	66.7	2	0
Jamal Crawford	38-315	22	1/29/2019	PHX	@	SAS	30	2	7	1	0	2	8	12	66.7	3	5	60.0	3	4	75.0	3	+7
Eddie Johnson	38-312	37	3/9/1998	HOU	@	UTA	42	3	2	2	0	3	13	18	72.2	4	7	57.1	7	7	100.0	2	-3
Sam Perkins	38-293	22	4/2/2000	IND	@	TOR	27	7	2	1	2	0	7	8	87.5	6	6	100.0	2	2	100.0	2	+24