LeBron James has the most career games by a player younger than 30, with 871 games.

Interpreted as:

most regular-season games by NBA player before age 30

	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	LeBron James L. James	871	39.5	27.4	7.2	6.9	1.7	0.8	9.9	19.8	49.6	1.4	4.0	34.2	6.4	8.5	74.7	58.1	1.2	6.0	3.3	34,364	23,901	6,239	6,011	1,483	698	2,906	1,615	+4650
2	Kobe Bryant K. Bryant	866	36.5	25.0	5.3	4.6	1.5	0.6	8.6	19.0	45.3	1.3	3.7	34.0	6.5	7.7	83.9	55.7	1.2	4.1	2.9	31,571	21,619	4,590	4,002	1,321	507	2,542	2,338	+3229
3	Josh Smith J. Smith	855	33.2	14.9	7.7	3.2	1.2	2.0	5.8	12.9	45.5	0.5	1.7	28.5	2.7	4.3	63.3	50.6	2.0	5.7	2.5	28,403	12,767	6,541	2,730	1,057	1,691	2,148	2,381	-194
4	Kevin Garnett K. Garnett	851	38.2	20.4	11.2	4.5	1.4	1.7	8.2	16.5	49.3	0.2	0.6	29.7	3.9	5.0	77.3	54.3	2.8	8.4	2.6	32,540	17,337	9,567	3,833	1,193	1,450	2,182	2,171	+2444
5	Dwight Howard D. Howard	824	35.6	18.1	12.7	1.5	1.0	2.1	6.4	11.1	57.9	0.0	0.1	10.4	5.2	9.0	57.3	59.8	3.5	9.2	3.1	29,310	14,876	10,504	1,250	810	1,739	2,540	2,724	+2945
6	Thaddeus Young T. Young	820	30.7	13.4	5.9	1.6	1.5	0.4	5.8	11.6	49.9	0.4	1.3	32.6	1.4	2.1	67.5	53.6	2.0	3.9	1.4	25,201	11,020	4,876	1,287	1,192	331	1,170	1,788	-235
7	Giannis Antetokounmpo G. Antetokounmpo	811	32.8	23.6	9.8	4.9	1.1	1.2	8.6	15.7	54.7	0.7	2.3	28.6	5.7	8.2	69.9	61.0	1.8	8.0	3.0	26,606	19,121	7,953	3,981	913	1,011	2,446	2,426	+2695
8	Tony Parker T. Parker	806	32.9	16.8	3.0	5.9	1.0	0.1	6.7	13.6	49.2	0.4	1.4	31.0	3.0	4.1	73.8	54.7	0.4	2.6	2.5	26,514	13,576	2,447	4,748	782	60	2,035	1,462	+4173
9	Carmelo Anthony C. Anthony	790	36.5	25.3	6.5	3.1	1.1	0.5	9.0	19.7	45.5	1.1	3.1	34.5	6.2	7.7	81.1	54.7	1.9	4.6	2.9	28,838	19,958	5,173	2,423	868	382	2,307	2,368	+1787
10	Mark Olberding M. Olberding	789	26.2	10.0	5.5	2.7			3.5	7.1	49.3	0.0			3.0	3.7	80.7	57.3				20,655	7,891	4,323	2,100				2,739
11	Andre Drummond A. Drummond	785	28.2	13.2	12.7	1.3	1.3	1.4	5.5	10.2	54.2	0.0	0.1	12.8	2.1	4.3	47.5	54.2	4.3	8.4	1.9	22,116	10,337	9,963	1,036	1,021	1,082	1,486	2,365	-598
12	Marvin Williams M. Williams	785	28.8	10.5	5.2	1.3	0.8	0.5	3.8	8.5	44.6	0.8	2.2	35.4	2.2	2.7	80.2	54.2	1.3	3.9	1.0	22,596	8,273	4,086	1,019	603	395	815	1,646	-351
13	Chris Bosh C. Bosh	784	36.0	19.2	8.7	2.0	0.8	1.1	6.9	13.9	49.8	0.2	0.6	31.2	5.2	6.5	80.0	57.3	2.3	6.4	2.1	28,218	15,082	6,825	1,557	636	857	1,610	1,960	+2046
14	Tracy McGrady T. McGrady	784	35.0	22.1	6.1	4.7	1.3	0.9	8.0	18.4	43.6	1.3	3.8	33.9	4.7	6.3	74.9	52.1	1.5	4.6	2.3	27,462	17,289	4,777	3,700	1,039	744	1,830	1,485	+1265
15	Rashard Lewis R. Lewis	777	34.6	16.9	5.8	1.9	1.1	0.6	6.1	13.4	45.8	1.8	4.7	39.1	2.8	3.5	80.8	56.7	1.6	4.2	1.6	26,856	13,128	4,485	1,452	888	451	1,282	1,885	+1408
16	Stephon Marbury S. Marbury	777	38.3	19.8	3.0	7.9	1.2	0.1	7.0	16.2	43.4	1.2	3.6	32.1	4.6	5.8	78.7	52.8	0.7	2.3	3.1	29,791	15,399	2,357	6,171	969	114	2,411	1,874	-789
17	Al Harrington A. Harrington	776	29.9	14.0	5.8	1.8	0.9	0.3	5.4	11.9	44.8	0.8	2.4	35.2	2.4	3.3	73.0	52.2	1.7	4.1	2.0	23,198	10,862	4,520	1,382	721	217	1,535	2,522	-685
18	Kevin Durant K. Durant	771	37.1	27.1	7.1	3.9	1.2	1.1	9.2	18.8	49.0	1.9	4.8	38.4	6.9	7.8	88.2	61.1	0.8	6.4	3.1	28,603	20,913	5,495	3,029	890	857	2,428	1,463	+3022
19	Joe Johnson J. Johnson	771	36.8	17.7	4.2	4.5	1.0	0.2	6.8	15.4	44.3	1.5	4.1	36.6	2.6	3.2	79.3	52.7	1.0	3.2	2.2	28,349	13,628	3,259	3,463	753	180	1,678	1,523	+392
20	Antoine Walker A. Walker	769	37.5	19.0	8.3	3.9	1.3	0.6	7.4	17.8	41.6	1.6	4.9	32.9	2.6	4.1	64.2	48.6	2.3	6.0	3.0	28,821	14,619	6,384	2,995	1,004	444	2,317	2,263	-1086
21	James Harden J. Harden	765	34.1	24.3	5.2	6.2	1.6	0.5	7.2	16.2	44.3	2.6	7.3	36.5	7.3	8.5	85.7	60.9	0.8	4.5	3.6	26,105	18,627	4,000	4,743	1,189	383	2,770	1,977	+3136
22	Isiah Thomas I. Thomas	764	36.5	19.8	3.7	9.7			7.6	16.5	45.9	0.4			4.3	5.6	76.3	52.1				27,924	15,130	2,840	7,431				2,428
23	Shareef Abdur-Rahim S. Abdur-Rahim	763	35.8	18.9	7.8	2.6	1.0	0.8	6.8	14.4	47.2	0.2	0.7	30.0	5.1	6.2	81.4	55.0	2.3	5.5	2.7	27,338	14,438	5,940	2,014	779	609	2,059	2,137	-2773
24	JR Smith	762	26.5	13.2	3.3	2.3	1.0	0.2	4.8	11.2	42.4	1.9	5.2	37.2	1.8	2.4	73.7	53.8	0.5	2.7	1.5	20,180	10,089	2,485	1,720	773	158	1,134	1,725	+1208
25	Dirk Nowitzki D. Nowitzki	758	36.5	22.4	8.6	2.7	0.9	1.0	7.7	16.4	47.1	1.3	3.5	37.9	5.6	6.5	87.0	58.3	1.3	7.3	1.9	27,642	16,990	6,501	2,050	715	794	1,461	2,002	+4402