Dwight Howard has the most career games by a player younger than 25, with 508 games.

Interpreted as:

most regular-season game by a player before age 25

	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	Dwight Howard D. Howard	508	35.7	17.6	12.6	1.5	0.9	2.1	6.2	10.7	57.5	0.0	0.0	5.0	5.2	8.8	59.6	60.2	3.6	9.1	3.0	18,130	8,936	6,419	745	461	1,088	1,540	1,650	+1731
2	LeBron James L. James	505	40.4	27.6	7.0	6.8	1.7	0.9	9.9	20.9	47.2	1.4	4.2	33.0	6.5	8.8	74.0	55.8	1.3	5.7	3.3	20,402	13,927	3,537	3,419	879	432	1,663	1,011	+1927
3	Kobe Bryant K. Bryant	496	33.9	21.5	5.0	4.2	1.4	0.6	7.7	16.8	45.6	0.8	2.5	33.2	5.3	6.4	83.1	54.8	1.2	3.7	2.7	16,826	10,658	2,458	2,060	714	320	1,339	1,323	+2020
4	Giannis Antetokounmpo G. Antetokounmpo	487	32.7	19.4	8.5	4.2	1.2	1.3	7.1	13.5	52.4	0.5	1.9	28.2	4.7	6.4	73.0	59.3	1.7	6.8	2.7	15,917	9,427	4,135	2,042	589	656	1,313	1,465	+760
5	Tracy McGrady T. McGrady	487	33.6	21.4	6.4	4.1	1.3	1.2	7.8	17.4	44.7	1.1	3.2	35.4	4.7	6.2	75.6	53.0	2.0	4.4	2.2	16,375	10,420	3,115	2,007	643	570	1,067	965	+169
6	Josh Smith J. Smith	478	33.7	14.3	7.7	3.0	1.3	2.3	5.4	11.7	46.4	0.3	1.1	27.6	3.1	4.7	66.9	51.9	2.2	5.5	2.5	16,103	6,843	3,665	1,417	601	1,116	1,183	1,416	-347
7	Tony Parker T. Parker	471	33.1	15.6	3.1	5.4	1.0	0.1	6.2	12.7	48.6	0.6	1.8	31.8	2.7	3.7	71.6	54.4	0.5	2.6	2.5	15,567	7,343	1,459	2,548	484	32	1,183	953	+2554
8	Andre Drummond A. Drummond	463	30.4	13.6	13.4	1.1	1.3	1.5	5.8	10.6	54.5	0.0	0.1	16.7	2.0	4.7	42.1	53.4	4.7	8.7	1.7	14,063	6,291	6,192	514	590	707	794	1,434	-543
9	Kevin Durant K. Durant	461	38.2	26.6	6.8	3.1	1.3	1.0	9.0	18.9	47.5	1.5	4.1	37.3	7.2	8.1	88.4	59.3	0.9	6.0	3.2	17,595	12,258	3,153	1,447	578	470	1,474	862	+640
10	Eddy Curry E. Curry	458	26.0	13.6	5.5	0.6	0.3	0.8	5.2	9.4	54.7	0.0	0.0	100.0	3.3	5.1	64.4	58.2	1.9	3.6	2.3	11,894	6,234	2,512	263	145	362	1,054	1,414	-1494
11	Kevin Garnett K. Garnett	448	37.4	18.5	9.5	3.9	1.4	1.8	7.6	15.7	48.7	0.2	0.5	31.0	3.0	4.1	74.6	52.8	2.7	6.9	2.5	16,735	8,280	4,271	1,733	639	798	1,110	1,173	+869
12	Bismack Biyombo B. Biyombo	447	21.4	4.9	6.6	0.4	0.3	1.5	1.8	3.5	51.2	0.0	0.0	0.0	1.2	2.3	55.3	53.7	2.0	4.6	0.9	9,558	2,176	2,945	189	117	667	411	1,031	-1170
13	Andrew Wiggins A. Wiggins	446	35.8	19.7	4.3	2.3	1.0	0.6	7.3	16.5	44.2	1.2	3.6	33.4	4.0	5.4	73.4	52.3	1.2	3.1	2.1	15,966	8,801	1,933	1,034	444	268	938	963	-616
14	Enes Kanter Freedom E. Kanter Freedom	445	21.3	11.3	6.7	0.6	0.4	0.4	4.6	8.7	53.0	0.1	0.2	29.9	2.1	2.7	76.8	57.5	2.7	4.1	1.5	9,479	5,031	2,997	269	168	197	682	942	-354
15	Carmelo Anthony C. Anthony	445	36.2	24.2	6.1	3.1	1.1	0.4	8.7	18.9	46.0	0.7	2.3	30.7	6.1	7.7	79.6	54.3	2.0	4.2	3.1	16,113	10,768	2,730	1,367	503	199	1,375	1,334	+790
16	Jermaine O'Neal J. O'Neal	441	24.1	11.0	6.8	1.0	0.4	1.6	4.3	9.0	47.6	0.0	0.1	17.8	2.4	3.7	65.6	51.8	2.0	4.8	1.5	10,648	4,829	2,998	427	192	725	658	1,141	+324
17	Thaddeus Young T. Young	437	29.3	13.0	5.4	1.2	1.2	0.4	5.6	10.9	51.2	0.3	0.8	33.2	1.5	2.2	69.7	54.7	2.0	3.5	1.3	12,798	5,661	2,369	522	541	168	552	912	+585
18	Marvin Williams M. Williams	430	31.0	11.7	5.3	1.4	0.8	0.5	4.2	9.3	45.2	0.4	1.2	31.1	3.0	3.7	80.8	53.8	1.4	3.9	1.3	13,323	5,037	2,288	583	338	195	541	1,034	-242
19	Darryl Dawkins D. Dawkins	430		11.3	6.8				4.7			0.0			2.0	2.9	67.7						4,864	2,935
20	Derrick Favors D. Favors	429	26.0	11.7	7.3	1.1	0.8	1.4	4.7	9.1	51.2	0.0	0.0	6.3	2.3	3.5	66.8	54.8	2.5	4.8	1.5	11,162	5,003	3,130	454	343	585	663	1,234	-440
21	Chris Bosh C. Bosh	427	37.1	19.5	9.0	2.1	0.8	1.2	6.8	14.0	48.6	0.1	0.3	30.1	5.8	7.3	79.4	56.6	2.6	6.4	2.2	15,829	8,324	3,864	912	341	515	929	1,131	+195
22	Jayson Tatum J. Tatum	424	33.9	22.2	6.9	3.3	1.1	0.7	7.8	17.1	45.7	2.4	6.4	37.7	4.2	5.0	84.8	57.7	0.9	6.0	2.3	14,385	9,429	2,936	1,386	470	297	954	894	+2404
23	JR Smith	424	23.7	12.5	2.6	2.0	0.9	0.2	4.4	10.4	42.7	1.8	5.0	36.8	1.8	2.5	74.2	54.6	0.5	2.1	1.5	10,067	5,320	1,088	829	380	70	649	880	+404
24	Spencer Hawes S. Hawes	420	23.7	9.0	6.0	1.8	0.4	1.1	3.9	8.3	46.7	0.3	0.9	31.5	1.0	1.4	68.3	50.4	1.8	4.3	1.5	9,966	3,777	2,540	753	159	448	630	1,111	-983
25	Maurice Harkless M. Harkless	415	23.0	7.3	3.6	0.9	1.0	0.6	2.9	6.1	47.4	0.6	1.9	33.0	0.9	1.5	60.7	54.1	1.2	2.4	0.9	9,541	3,031	1,488	363	399	269	370	791	-777