Kobe Bryant has the most career games by a player younger than 20, with 150 games.

Interpreted as:

most regular-season games by NBA player before age 20

	NAME	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Kobe Bryant K. Bryant	150	21.1	11.7	2.5	1.9	0.8	0.4	3.8	8.9	42.5	0.8	2.4	35.4	3.3	4.2	80.1	54.7	0.8	1.7	1.8	3,159	1,759	374	290	123	63	269	282	+324
2	Andrew Bynum A. Bynum	128	16.7	5.6	4.4	0.8	0.1	1.2	2.2	4.1	53.3	0.0	0.0	0.0	1.2	1.9	62.7	56.3	1.4	3.1	1.0	2,132	711	564	103	16	150	132	305	-159
3	Tracy McGrady T. McGrady	113	20.2	8.0	4.8	1.9	0.9	1.1	3.1	6.9	44.3	0.2	0.7	28.9	1.7	2.4	72.0	50.4	2.0	2.8	1.3	2,285	909	547	211	101	127	146	180	-258
4	LeBron James L. James	108	39.9	21.9	5.9	6.2	1.9	0.8	8.2	18.8	43.5	0.8	2.7	30.8	4.6	6.1	75.6	50.8	1.3	4.6	3.4	4,307	2,362	634	673	202	83	367	202	-11
5	Jermaine O'Neal J. O'Neal	105	12.1	4.3	3.1	0.2	0.2	0.8	1.7	3.7	47.1	0.0	0.0	0.0	0.9	1.6	55.1	49.6	1.1	2.0	0.8	1,266	454	325	25	17	84	82	147	+40
6	Bill Willoughby B. Willoughby	101		4.8					1.9						1.1	1.6	66.9						485
7	Dwight Howard D. Howard	100	33.3	12.4	10.6	1.0	0.9	1.6	4.5	8.8	51.1	0.0	0.0	0.0	3.5	5.3	65.2	55.9	3.5	7.1	2.0	3,327	1,243	1,061	100	94	163	203	297	-216
8	Giannis Antetokounmpo G. Antetokounmpo	98	25.1	7.9	4.7	2.0	0.7	0.7	2.7	6.2	43.3	0.4	1.3	32.8	2.0	2.9	69.6	52.3	1.1	3.7	1.6	2,460	770	463	194	73	73	156	225	-183
9	Andris Biedrins A. Biedrins	91	13.8	3.6	3.8	0.3	0.4	0.7	1.6	2.5	64.0	0.0	0.0	0.0	0.4	1.1	36.7	60.5	1.6	2.2	0.5	1,255	328	349	30	33	66	41	259	+80
10	Josh Smith J. Smith	90	27.2	9.5	5.9	1.6	0.8	2.0	3.6	8.2	44.1	0.0	0.3	14.8	2.2	3.2	69.8	49.5	1.9	4.0	1.8	2,447	851	531	143	71	176	164	198	-466
11	Eddy Curry E. Curry	90	16.3	6.8	3.8	0.4	0.2	0.6	2.7	5.4	49.5	0.0	0.0		1.5	2.3	63.5	53.1	1.5	2.3	1.0	1,464	614	342	32	18	58	94	217	-369
12	Bub Carrington B. Carrington	82	30.0	9.8	4.2	4.4	0.7	0.3	3.7	9.1	40.1	1.7	5.0	33.9	0.8	1.0	81.2	51.4	0.4	3.8	1.7	2,458	807	341	364	54	21	141	190	-798
13	Marquese Chriss M. Chriss	82	21.3	9.2	4.2	0.7	0.8	0.9	3.5	7.7	44.9	0.9	2.7	32.1	1.4	2.2	62.4	52.9	1.2	3.1	1.3	1,743	753	348	60	67	70	108	263	-380
14	Danté Exum D. Exum	82	22.2	4.8	1.6	2.4	0.5	0.2	1.8	5.1	34.9	1.0	3.2	31.4	0.2	0.4	62.5	45.7	0.3	1.3	1.4	1,817	393	131	198	41	14	118	147	+91
15	Carmelo Anthony C. Anthony	82	36.5	21.0	6.1	2.8	1.2	0.5	7.6	17.9	42.6	0.8	2.6	32.2	5.0	6.4	77.7	50.9	2.2	3.8	3.0	2,995	1,725	498	227	97	41	247	225	+65
16	Ronald Holland II R. Holland II	81	15.6	6.4	2.7	1.0	0.6	0.2	2.4	5.1	47.4	0.4	1.9	23.8	1.1	1.5	75.4	55.6	0.5	2.2	0.9	1,266	522	218	82	49	17	72	141	-55
17	Darius Miles D. Miles	81	26.3	9.4	5.9	1.2	0.6	1.5	3.9	7.8	50.5	0.0	0.2	5.3	1.5	2.9	52.1	51.8	1.6	4.3	1.8	2,133	761	477	99	51	125	147	191	+30
18	Shaedon Sharpe S. Sharpe	80	22.2	9.9	3.0	1.2	0.5	0.3	3.8	8.1	47.2	1.3	3.5	36.0	0.9	1.3	71.4	56.8	0.8	2.2	1.0	1,779	789	236	94	38	24	83	136	-297
19	Kevin Durant K. Durant	80	34.6	20.3	4.4	2.4	1.0	0.9	7.3	17.1	43.0	0.7	2.6	28.8	4.9	5.6	87.3	51.9	0.9	3.5	2.9	2,768	1,624	348	192	78	75	232	122	-651
20	Trevor Ariza T. Ariza	80	17.3	5.9	3.0	1.1	0.9	0.2	2.2	4.9	44.2	0.0	0.2	23.1	1.5	2.2	69.5	50.3	1.1	1.9	0.9	1,382	468	242	85	70	18	73	150	-26
21	Kevin Garnett K. Garnett	80	28.7	10.4	6.3	1.8	1.1	1.6	4.5	9.2	49.1	0.1	0.4	28.6	1.3	1.9	70.5	52.2	2.2	4.1	1.4	2,293	835	501	145	86	131	110	189
22	Jabari Smith Jr. J. Smith Jr.	79	31.0	12.8	7.2	1.3	0.5	0.9	4.6	11.3	40.8	1.5	4.9	30.7	2.1	2.6	78.6	51.4	1.5	5.7	1.3	2,450	1,010	569	101	43	74	104	227	-555
23	Brandon Ingram B. Ingram	79	28.9	9.4	4.0	2.1	0.6	0.5	3.5	8.7	40.2	0.7	2.4	29.4	1.7	2.7	62.1	47.4	0.8	3.2	1.5	2,279	740	316	166	50	36	116	158	-381
24	Martell Webster M. Webster	79	18.7	6.7	2.2	0.6	0.4	0.3	2.3	5.7	40.2	1.2	3.1	37.4	1.0	1.2	83.2	54.2	0.4	1.8	0.8	1,476	533	174	45	32	20	64	126	-272
25	Marvin Williams M. Williams	79	24.7	8.5	4.8	0.8	0.6	0.3	3.0	6.7	44.3	0.2	0.7	24.5	2.4	3.2	74.7	52.3	1.5	3.3	1.1	1,952	672	383	63	48	24	83	227	-87