Paul Westphal had his most career points per game against the Celtics, with 20.6 per game.

paul westphal highest career ppg by opponent

OPP	PPG	GP	MPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
Celtics	20.6	30	30.6	1.9	5.4				7.9	15.3	51.4	0.4	0.7	50.0	4.7	5.3	89.3	918	619	56	162				59
Spurs	19.5	23	28.6	1.8	6.3	1.8	0.3	2.8	8.0	15.1	53.2	0.1	0.5	16.7	3.3	4.1	81.1	657	448	41	144	41	6	53	47
Nuggets	19.3	26	28.0	1.8	5.5			2.2	7.4	15.3	48.1	0.1			4.4	5.3	83.9	728	501	46	144			48	50
Jazz	18.8	33	29.8	1.7	4.3				7.5	13.8	54.3	0.1	0.5	16.7	3.8	4.5	85.0	983	622	56	141
Lakers	17.7	42	26.6	2.1	4.2				7.1	14.1	50.4	0.2	1.1	18.8	3.4	4.2	79.7	1,118	742	89	176				81
Kings	17.7	42		2.1	4.1			2.8	6.9	13.2	52.4	0.1			3.8	4.7	79.8		742	89	171			62	104
Pacers	16.6	24	28.9	1.8	6.4				6.5	13.2	48.9	0.3	0.3	75.0	3.6	4.1	87.8	693	399	43	153				46
Bulls	16.6	40	27.8	1.7	4.9				6.6	13.6	48.3	0.3	0.5	50.0	3.4	4.1	82.2	1,110	662	68	196				105
Warriors	16.2	41	26.4	2.1	4.1			2.6	6.7	13.4	49.8	0.3	0.9	33.3	2.8	3.5	80.3	1,082	666	85	170			55	83
Rockets	15.9	40		2.0				2.1	6.6	11.7	56.7	0.3	0.5	50.0	2.6	3.3	79.4		634	81				33
Knicks	15.7	42	23.1	2.4	3.6			2.3	6.3	12.3	51.5	0.2	1.6	12.5	3.0	3.6	82.8	972	658	100	153			30	82
Bucks	15.6	42	25.8	1.7	4.2			2.8	6.2	12.6	49.0	0.4	1.7	22.2	3.2	3.6	86.9	1,082	657	72	176			68	70
Bullets	15.6	42	25.3	2.4	4.3				6.7	13.0	51.3	0.1			2.2	2.9	78.3	1,062	657	99	179				85
Nets	15.1	22	27.0	1.4	4.2				5.9	12.0	49.1	0.1			3.3	4.0	81.8	593	333	30	93				58
Pistons	14.8	39	23.4	1.7	4.3				6.1	11.5	53.0	0.2			2.6	3.3	80.5	913	579	65	168
Trail Blazers	14.8	47	26.2	2.0	4.7	1.2	0.3	2.4	5.6	11.1	51.0	0.1	0.2	33.3	3.5	4.3	83.0	1,232	697	94	222	54	13	59	99
SuperSonics	14.8	41	24.9	1.9	4.0			2.6	5.8	11.8	48.9	0.1			3.2	3.9	84.2	1,020	606	79	163			50	77
Hawks	14.2	42							5.4			0.3			3.4	4.6	74.1		598
Mavericks	14.1	10	23.3	1.1	4.3		0.5	1.2	5.4	10.2	52.9	0.3	0.7	42.9	3.0	3.4	88.2	233	141	11	43		5	12	20
Clippers	13.4	49	23.1	1.8	3.9				5.2	10.1	51.7	0.3			2.8	3.4	84.2	1,130	656	87	190				81
Cavaliers	13.2	40	23.2	2.0	4.1			3.2	5.3	10.9	48.6	0.3	0.9	27.3	2.6	3.1	82.3	927	527	81	162			60	88
76ers	10.8	50		1.8	4.1				4.1	9.5	43.3	0.2	0.6	37.5	2.5	3.2	79.7		541	91	203				108
Suns	7.8	16	17.9	2.3	2.8	0.6		2.2	2.8	7.1	39.8	0.0	0.6	0.0	2.1	2.9	72.3	286	124	37	45	8		11	30