Larry Bird had the most games for the Celtics with 40+ points, with 47 games.

Interpreted as:

most 40 or more point regular-season games by a celtics player

NAME	GP	PTS	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	REB	AST	STL	BLK	TOV	PF	+/-
Larry Bird	47	2,077	42.5	44.2	10.7	6.2	1.9			17.2	28.5	60.3	1.5	3.4	44.1	8.3	8.9	93.1	1,996	504	293	87			117
Jayson Tatum	25	1,113	38.9	44.5	8.0	4.2	1.0	0.7	2.0	14.5	25.0	58.0	5.8	10.8	54.3	9.6	10.8	89.6	973	201	104	25	18	51	55	+343
Paul Pierce	21	894	42.9	42.6	7.0	3.4	2.4	1.0	3.6	13.1	24.4	53.9	3.0	6.3	48.5	13.2	15.8	84.0	900	147	72	50	22	75	59	+164
John Havlicek	12	495		41.3			2.0	1.0		16.6	29.9	55.4				8.1	9.5	85.1				2	1		28
Jaylen Brown	10	426	37.8	42.6	9.2	3.1	1.1	0.6	4.0	16.5	25.8	64.0	4.2	8.4	50.0	5.4	7.3	74.0	378	92	31	11	6	40	24	+128
Tom Heinsohn	8	338		42.3						17.6	31.3	56.4				7.0	9.3	75.7							33
Isaiah Thomas	5	222	38.8	44.4	2.4	5.4	1.0	0.2	3.0	12.4	23.0	53.9	5.8	11.4	50.9	13.8	14.4	95.8	194	12	27	5	1	15	11	+15
Sam Jones	5	221		44.2						17.6						9.0	10.2	88.2
Kyrie Irving	4	170	39.2	42.5	5.5	6.0	1.3	0.5	2.3	16.3	26.0	62.5	4.5	7.5	60.0	5.5	6.5	84.6	157	22	24	5	2	9	10	+55
Antoine Walker	4	181	43.5	45.3	7.5	6.5	2.5	0.3	3.0	17.3	31.0	55.6	6.3	10.8	58.1	4.5	8.0	56.3	174	30	26	10	1	12	17	+3
Dee Brown	3	122	47.3	40.7	5.7	5.7	2.0	1.7	1.7	13.0	21.7	60.0	4.0	6.3	63.2	10.7	12.3	86.5	142	17	17	6	5	5	9
Bob Cousy	3	128		42.7						16.3	32.0	51.0				10.0	11.0	90.9							6
Bill Sharman	3	127	37.3	42.3	4.3					16.7	28.3	58.8				9.0	9.7	93.1	112	13					8
Kemba Walker	2	84	36.8	42.0	7.0	5.0	1.0	0.5	2.0	15.0	25.5	58.8	5.5	13.0	42.3	6.5	8.0	81.3	74	14	10	2	1	4	3	-5
Kevin McHale	2	98	42.5	49.0	12.5	3.0	0.5	2.0	4.0	18.5	24.5	75.5	0.0	0.0		12.0	14.5	82.8	85	25	6	1	4	8	8
Jeff Green	1	43	40.1	43.0	7.0	2.0	2.0	4.0	2.0	14.0	21.0	66.7	5.0	7.0	71.4	10.0	13.0	76.9	40	7	2	2	4	2	2	+3
Todd Day	1	41	38.0	41.0	3.0	3.0	3.0	0.0	3.0	11.0	18.0	61.1	5.0	8.0	62.5	14.0	16.0	87.5	38	3	3	3	0	3	5
Dominique Wilkins	1	43	41.0	43.0	9.0	2.0	1.0	0.0	7.0	16.0	27.0	59.3	5.0	6.0	83.3	6.0	9.0	66.7	41	9	2	1	0	7	5
Reggie Lewis	1	42	39.0	42.0	5.0	3.0	1.0	0.0	1.0	16.0	24.0	66.7	0.0	0.0		10.0	12.0	83.3	39	5	3	1	0	1	2
Danny Ainge	1	45	37.0	45.0	3.0	6.0	2.0	0.0	3.0	20.0	29.0	69.0	2.0	4.0	50.0	3.0	4.0	75.0	37	3	6	2	0	3	1
Robert Parish	1	40	33.0	40.0	13.0	1.0	0.0	1.0		15.0	23.0	65.2	0.0	0.0		10.0	15.0	66.7	33	13	1	0	1		2
Bob McAdoo	1	42	46.0	42.0	12.0	5.0	1.0	1.0	9.0	18.0	22.0	81.8				6.0	7.0	85.7	46	12	5	1	1	9	5
Jo Jo White	1	41	42.0	41.0	4.0	8.0	0.0	0.0		18.0	25.0	72.0				5.0	5.0	100.0	42	4	8	0	0		0
Don Nelson	1	40	38.0	40.0	12.0	5.0				13.0	18.0	72.2				14.0	15.0	93.3	38	12	5				3
Ed Macauley	1	46	41.0	46.0						18.0	29.0	62.1				10.0	17.0	58.8	41						3