Jayson Tatum had the highest plus/minus for the Celtics in 2020-21, at +161.

boston celtics player with best plus minus 2021

NAME	+/-	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
Jayson Tatum	+161	2020-21	BOS	64	35.8	26.4	7.4	4.3	1.2	0.5	2.7	9.5	20.6	45.9	2.9	7.6	38.6	4.6	5.3	86.8	2,290	1,692	472	276	75	31	171	122
Kemba Walker	+93	2020-21	BOS	43	31.8	19.3	4.0	4.9	1.1	0.3	2.0	6.6	15.7	42.0	3.0	8.2	36.0	3.1	3.5	89.9	1,369	829	170	212	48	12	88	61
Marcus Smart	+93	2020-21	BOS	48	32.9	13.1	3.5	5.7	1.5	0.5	2.0	4.2	10.6	39.8	1.9	5.9	33.0	2.7	3.4	79.0	1,581	627	167	273	72	23	96	126
Jaylen Brown	+69	2020-21	BOS	58	34.5	24.7	6.0	3.4	1.2	0.6	2.7	9.3	19.2	48.4	2.8	7.1	39.7	3.3	4.3	76.4	1,999	1,430	347	195	72	32	158	168
Daniel Theis	+68	2020-21	BOS	42	24.5	9.5	5.2	1.6	0.6	1.0	1.0	3.8	6.9	55.2	0.8	2.3	34.7	1.1	1.6	68.7	1,027	397	220	67	25	43	41	120
Jeff Teague	+57	2020-21	BOS	34	18.1	6.9	1.7	2.1	0.8	0.2	1.1	2.3	5.5	41.5	0.8	1.6	46.4	1.5	1.8	83.6	616	233	57	73	26	7	39	43
Evan Fournier	+44	2020-21	BOS	16	29.5	13.0	3.3	3.1	1.3	0.6	1.2	4.8	10.8	44.8	2.8	5.9	46.3	0.6	0.9	71.4	472	208	53	49	20	10	19	41
Luke Kornet	+44	2020-21	BOS	18	14.1	4.4	2.9	1.1	0.1	1.4	0.3	1.9	4.1	47.3	0.5	2.0	25.0	0.1	0.1	50.0	254	80	52	20	2	25	6	19
Payton Pritchard	+40	2020-21	BOS	66	19.2	7.7	2.4	1.8	0.6	0.1	0.8	2.8	6.3	44.0	1.5	3.8	41.1	0.6	0.7	88.9	1,268	510	158	120	37	9	53	104
Tacko Fall	+26	2020-21	BOS	18	7.6	2.6	2.9	0.2	0.1	1.1	0.3	1.2	1.6	72.4	0.0	0.0		0.3	0.8	33.3	136	47	52	3	1	20	6	22
Tristan Thompson	+24	2020-21	BOS	54	23.8	7.6	8.1	1.2	0.4	0.6	1.1	3.1	6.0	51.8	0.0	0.1	0.0	1.3	2.2	59.2	1,287	409	439	67	24	33	62	119
Jabari Parker	+9	2020-21	BOS	10	13.8	6.4	3.6	1.0	0.1	0.4	0.7	2.6	4.8	54.2	0.2	1.0	20.0	1.0	1.3	76.9	138	64	36	10	1	4	7	9
Robert Williams III	+8	2020-21	BOS	52	18.9	8.0	6.9	1.8	0.8	1.8	1.0	3.6	5.0	72.1	0.0	0.0	0.0	0.9	1.4	61.6	985	417	358	94	43	91	52	105
Semi Ojeleye	+5	2020-21	BOS	56	17.0	4.6	2.6	0.7	0.3	0.0	0.4	1.6	3.9	40.3	1.0	2.8	36.7	0.4	0.6	75.0	950	260	147	37	17	0	21	56
Aaron Nesmith	-7	2020-21	BOS	46	14.5	4.7	2.8	0.5	0.3	0.2	0.5	1.7	3.9	43.8	0.9	2.3	37.0	0.5	0.6	78.6	669	218	127	23	15	9	23	87
Tremont Waters	-10	2020-21	BOS	26	9.2	3.8	0.8	2.4	0.6	0.0	1.0	1.3	3.2	40.5	0.6	1.5	39.5	0.6	0.7	94.1	238	99	21	62	15	1	27	17
Moritz Wagner	-20	2020-21	BOS	9	6.8	1.2	2.1	0.7	0.0	0.1	1.0	0.4	1.6	28.6	0.2	0.7	33.3	0.1	0.2	50.0	61	11	19	6	0	1	9	10
Carsen Edwards	-25	2020-21	BOS	31	8.9	4.0	0.8	0.5	0.2	0.0	0.2	1.5	3.6	42.3	0.6	2.0	28.6	0.4	0.4	84.6	276	123	26	14	7	1	7	25
Javonte Green	-39	2020-21	BOS	25	13.8	4.2	2.1	0.4	0.7	0.1	0.5	1.6	2.8	54.9	0.3	0.9	31.8	0.8	1.2	66.7	345	105	52	11	18	2	13	32
Grant Williams	-48	2020-21	BOS	63	18.1	4.7	2.8	1.0	0.5	0.4	0.9	1.7	3.9	43.7	0.8	2.0	37.2	0.5	0.8	58.8	1,138	294	178	64	32	24	56	161
Romeo Langford	-67	2020-21	BOS	18	15.7	3.1	1.9	0.7	0.3	0.3	0.6	1.2	3.3	35.6	0.3	1.0	27.8	0.5	0.7	75.0	283	56	35	13	6	5	10	24