LeBron James has the most career assists by a player younger than 19, with 188 assists.

Interpreted as:

most assists before turning 19 years old by a player

	NAME	AST	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	STL	BLK	TOV	PF	+/-
1	LeBron James L. James	188	31	40.2	20.2	5.9	6.1	1.6	0.7	7.6	17.9	42.6	1.0	3.3	31.1	3.8	5.0	77.3	50.1	1.5	4.5	3.9	1,247	625	184	49	23	121	56	-67
2	Tracy McGrady T. McGrady	98	64	18.4	7.0	4.2	1.5	0.8	1.0	2.8	6.2	45.0	0.2	0.6	34.1	1.2	1.7	71.2	50.5	1.6	2.6	1.0	1,179	451	269	49	61	66	86	-229
3	Kobe Bryant K. Bryant	91	71	15.5	7.6	1.9	1.3	0.7	0.3	2.5	5.9	41.7	0.7	1.9	37.5	1.9	2.3	81.9	54.4	0.7	1.2	1.6	1,103	539	132	49	23	112	102	+60
4	Cooper Flagg C. Flagg	73	22	33.8	17.3	6.6	3.3	1.4	0.6	6.7	14.1	47.6	0.9	3.5	25.6	2.9	3.6	80.0	54.9	1.2	5.4	2.2	743	380	145	30	14	48	52	-153
5	Dwight Howard D. Howard	27	17	32.0	10.5	10.4	1.6	1.0	1.9	3.8	6.9	54.7	0.0	0.0		3.0	5.1	58.6	57.6	3.8	6.6	2.2	544	179	177	17	32	38	40	+19
6	Giannis Antetokounmpo G. Antetokounmpo	12	13	16.2	5.2	3.2	0.9	0.5	0.7	2.1	4.1	50.9	0.5	1.2	40.0	0.6	1.2	50.0	56.6	0.7	2.5	1.0	210	68	42	7	9	13	23	+3
7	Josh Smith J. Smith	11	13	12.7	5.1	2.6	0.8	0.3	0.7	1.9	3.9	49.0	0.0	0.2	0.0	1.2	1.9	64.0	53.2	1.0	1.6	1.2	165	66	34	4	9	16	18	-8
8	CJ Miles	9	17	7.9	2.4	1.5	0.5	0.2	0.0	0.8	2.9	28.6	0.2	0.8	21.4	0.6	0.8	76.9	37.5	0.6	0.8	0.4	134	41	25	4	0	6	15	+16
9	Yaroslav Korolev Y. Korolev	9	24	5.3	1.1	0.5	0.4	0.1	0.0	0.4	1.3	30.0	0.1	0.3	28.6	0.3	0.4	70.0	39.2	0.2	0.3	0.3	127	27	13	3	0	6	11	-8
10	Andrew Bynum A. Bynum	9	46	7.4	1.6	1.7	0.2	0.1	0.5	0.7	1.8	40.2	0.0	0.0		0.2	0.6	29.6	39.4	0.7	1.0	0.4	338	74	80	4	22	17	56	-47
11	Jermaine O'Neal J. O'Neal	8	45	10.2	4.1	2.8	0.2	0.0	0.6	1.5	3.4	45.1	0.0	0.0	0.0	1.0	1.7	60.3	49.4	0.9	1.9	0.6	458	185	124	2	26	27	46	+26
12	Darko Milicic D. Milicic	7	34	4.7	1.4	1.3	0.2	0.2	0.4	0.5	1.9	26.2	0.0	0.0	0.0	0.4	0.7	58.3	31.8	0.3	0.9	0.4	159	48	43	7	15	13	33	-45
13	Andris Biedrins A. Biedrins	6	20	11.9	3.7	3.2	0.3	0.5	0.8	1.6	2.6	59.6	0.0	0.1	0.0	0.6	1.3	42.3	57.5	1.2	2.0	0.4	237	73	63	9	15	7	49	+4
14	Jalen Duren J. Duren	4	13	21.4	6.3	7.4	0.3	0.3	1.2	2.7	4.8	55.6	0.0	0.1	0.0	0.9	2.4	38.7	53.5	2.9	4.5	1.1	279	82	96	4	15	14	27	-69
15	Joshua Primo J. Primo	4	8	7.4	2.0	0.8	0.5	0.4	0.5	0.8	1.4	54.5	0.5	1.0	50.0	0.0	0.0		72.7	0.1	0.6	0.0	59	16	6	3	4	0	4	+7
16	Dragan Bender D. Bender	4	9	9.4	3.3	1.0	0.4	0.2	0.3	1.3	3.1	42.9	0.7	1.7	40.0	0.0	0.0		53.6	0.3	0.7	0.3	85	30	9	2	3	3	12	+16
17	Eddy Curry E. Curry	4	13	12.4	4.4	2.2	0.3	0.2	0.8	1.5	3.6	40.4	0.0	0.0		1.5	2.4	61.3	47.0	0.6	1.6	0.9	161	57	29	2	11	12	23	-44
18	Amir Johnson A. Johnson	3	3	12.9	6.7	1.3	1.0	0.0	0.7	2.3	3.3	70.0	0.7	1.0	66.7	1.3	1.3	100.0	85.0	1.0	0.3	1.3	39	20	4	0	2	4	7	-22
19	Robert Swift R. Swift	2	7	3.9	0.4	0.0	0.3	0.0	0.1	0.1	0.4	33.3	0.0	0.0		0.1	0.3	50.0	38.7	0.0	0.0	0.0	27	3	0	0	1	0	5	-31
20	Ulrich Chomche U. Chomche	1	3	4.5	0.7	1.3	0.3	0.0	0.0	0.3	0.7	50.0	0.0	0.0		0.0	0.0		50.0	0.7	0.7	0.7	14	2	4	0	0	2	2	-1
21	Martell Webster M. Webster	1	9	9.2	4.0	0.7	0.1	0.1	0.0	1.6	3.6	43.8	0.9	2.0	44.4	0.0	0.0		56.3	0.1	0.6	1.0	83	36	6	1	0	9	8	-29