Ty-Shon Alexander had the best PER in the 2021 playoffs, with a 79.1 rating in his rookie season.

highest nba player efficiency rating 2021 playoffs

Interpreted as:

highest NBA player efficiency rating by a player 2021 playoffs

NAME	PER	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Ty-Shon Alexander	79.1	2020-21	PHX	1	1.0	2.0	0.0	0.0	0.0	0.0	0.0	1.0	1.0	100.0	0.0	0.0		0.0	0.0		1	2	0	0	0	0	0	0	-1
Kevin Knox II	43.6	2020-21	NYK	1	4.0	2.0	1.0	1.0	0.0	1.0	0.0	0.0	0.0		0.0	0.0		2.0	2.0	100.0	4	2	1	1	0	1	0	0	+9
Ersan Ilyasova	41.8	2020-21	UTA	1	3.0	4.0	0.0	0.0	0.0	0.0	0.0	1.0	2.0	50.0	0.0	1.0	0.0	2.0	2.0	100.0	3	4	0	0	0	0	0	0	-4
TJ Leaf	41.7	2020-21	POR	3	2.3	2.0	1.0	0.0	0.0	0.0	0.0	1.0	1.3	75.0	0.0	0.0		0.0	0.0		7	6	3	0	0	0	0	0	0
Carsen Edwards	34.9	2020-21	BOS	2	2.5	2.5	0.5	0.0	0.0	0.0	0.0	1.0	1.5	66.7	0.5	1.0	50.0	0.0	0.0		5	5	1	0	0	0	0	0	+1
Serge Ibaka	30.8	2020-21	LAC	2	9.0	5.0	2.0	1.0	0.5	1.5	0.5	1.5	3.0	50.0	0.0	1.0	0.0	2.0	2.0	100.0	18	10	4	2	1	3	1	1	+17
Kawhi Leonard	30.6	2020-21	LAC	11	39.3	30.4	7.7	4.4	2.1	0.8	2.2	11.1	19.4	57.3	2.2	5.5	39.3	6.0	6.8	88.0	432	334	85	48	23	9	24	29	+28
Damian Lillard	30.4	2020-21	POR	6	41.3	34.3	4.3	10.2	1.0	0.7	2.2	10.3	22.3	46.3	5.8	13.0	44.9	7.8	8.3	94.0	248	206	26	61	6	4	13	9	+27
Nikola Jokic	29.6	2020-21	DEN	10	34.5	29.8	11.6	5.0	0.6	0.9	2.4	11.6	22.8	50.9	2.0	5.3	37.7	4.6	5.5	83.6	345	298	116	50	6	9	24	23	-57
Giannis Antetokounmpo	27.6	2020-21	MIL	21	38.1	30.2	12.8	5.1	1.0	1.2	3.0	11.9	20.9	56.9	0.6	3.3	18.6	5.8	9.8	58.7	800	634	269	108	21	25	64	61	+130
Luka Doncic	27.4	2020-21	DAL	7	40.1	35.7	7.9	10.3	1.3	0.4	4.6	13.7	28.0	49.0	4.4	10.9	40.8	3.9	7.3	52.9	281	250	55	72	9	3	32	17	+7
Luke Kornet	27.3	2020-21	BOS	2	2.5	1.5	1.5	0.0	0.0	0.0	0.0	0.5	0.5	100.0	0.0	0.0		0.5	1.0	50.0	5	3	3	0	0	0	0	0	+1
Robert Williams III	27.3	2020-21	BOS	3	15.3	6.3	5.0	0.7	0.3	3.0	0.3	3.0	4.7	64.3	0.0	0.0		0.3	0.7	50.0	46	19	15	2	1	9	1	7	+14
Kevin Durant	26.9	2020-21	BKN	12	40.4	34.3	9.3	4.4	1.5	1.6	3.5	12.1	23.5	51.4	2.8	6.8	40.2	7.3	8.4	87.1	485	411	111	53	18	19	42	31	+34
Donovan Mitchell	26.3	2020-21	UTA	10	34.6	32.3	4.2	5.5	1.1	0.2	2.8	10.5	23.5	44.7	5.0	11.5	43.5	6.3	7.6	82.9	346	323	42	55	11	2	28	20	+19
Joel Embiid	26.2	2020-21	PHI	11	32.5	28.1	10.5	3.4	1.0	1.5	3.8	9.2	17.9	51.3	1.5	3.7	39.0	8.3	9.9	83.5	357	309	116	37	11	16	42	33	+121
Zeke Nnaji	25.7	2020-21	DEN	5	3.6	2.4	0.4	0.4	0.2	0.0	0.0	0.8	1.6	50.0	0.6	1.4	42.9	0.2	0.4	50.0	18	12	2	2	1	0	0	1	+9
DeMarcus Cousins	25.6	2020-21	LAC	7	8.3	7.6	2.0	0.7	0.3	0.4	0.7	2.7	6.0	45.2	0.6	1.4	40.0	1.6	2.0	78.6	58	53	14	5	2	3	5	13	-18
Vlatko Cancar	25.6	2020-21	DEN	5	4.2	2.2	0.6	0.2	0.2	0.2	0.2	0.6	0.6	100.0	0.2	0.2	100.0	0.8	1.0	80.0	21	11	3	1	1	1	1	0	+10
Daniel Gafford	25.2	2020-21	WAS	5	23.4	11.8	5.8	0.6	1.0	2.0	0.6	4.4	5.2	84.6	0.0	0.0		3.0	4.8	62.5	117	59	29	3	5	10	3	17	+7
Paul Reed	24.7	2020-21	PHI	3	3.7	1.3	2.7	0.0	0.0	0.3	0.0	0.7	1.3	50.0	0.0	0.0		0.0	0.0		11	4	8	0	0	1	0	1	0
Jayson Tatum	24.1	2020-21	BOS	5	37.0	30.6	5.8	4.6	1.2	1.6	2.6	9.4	22.2	42.3	2.8	7.2	38.9	9.0	9.8	91.8	185	153	29	23	6	8	13	15	-58
James Harden	23.9	2020-21	BKN	9	35.8	20.2	6.3	8.6	1.7	0.7	2.9	5.7	12.0	47.2	2.7	7.3	36.4	6.2	6.9	90.3	322	182	57	77	15	6	26	23	+55
Dwight Powell	22.8	2020-21	DAL	7	7.4	2.7	1.9	0.9	0.3	0.0	0.1	1.0	1.1	87.5	0.0	0.0		0.7	0.9	83.3	52	19	13	6	2	0	1	8	+10
Axel Toupane	22.8	2020-21	MIL	4	2.5	1.3	1.0	0.0	0.0	0.0	0.0	0.5	1.0	50.0	0.3	0.5	50.0	0.0	0.0		10	5	4	0	0	0	0	0	-5