LeBron James has the most career games by a player younger than 26, with 582 games.

Interpreted as:

most regular-season games before turning 26 years old by a player

	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	582	40.2	27.6	7.0	7.0	1.7	0.9	9.8	20.6	47.5	1.4	4.2	33.1	6.7	8.9	74.4	56.3	1.2	5.8	3.3	23,378	16,081	4,089	4,057	1,003	496	1,929	1,144	+2601
2	Dwight Howard D. Howard	567	36.0	18.2	12.9	1.5	1.0	2.2	6.4	11.0	57.8	0.0	0.0	3.8	5.4	9.1	59.8	60.5	3.6	9.2	3.1	20,401	10,322	7,287	831	545	1,228	1,755	1,843	+2093
3	Tracy McGrady T. McGrady	565	34.6	22.0	6.4	4.3	1.4	1.1	8.0	18.0	44.4	1.2	3.5	34.8	4.8	6.3	75.9	53.0	1.8	4.5	2.2	19,557	12,423	3,599	2,455	778	622	1,268	1,132	+461
4	Kobe Bryant K. Bryant	561	34.4	21.8	5.0	4.3	1.5	0.6	7.7	16.9	45.4	0.9	2.6	33.1	5.5	6.6	83.4	54.8	1.3	3.8	2.7	19,273	12,215	2,817	2,390	826	348	1,510	1,499	+2329
5	Andre Drummond A. Drummond	542	30.8	14.1	13.7	1.2	1.3	1.6	6.0	11.0	54.3	0.0	0.1	14.7	2.1	4.8	44.8	53.8	4.8	8.9	1.8	16,710	7,661	7,424	626	726	845	969	1,706	-367
6	Kevin Durant K. Durant	542	38.2	27.4	6.9	3.5	1.3	1.0	9.2	19.2	47.9	1.6	4.4	37.7	7.4	8.4	88.2	60.0	0.8	6.1	3.2	20,717	14,851	3,751	1,892	681	529	1,759	1,036	+1149
7	Tony Parker T. Parker	540	33.1	16.0	3.1	5.5	1.0	0.1	6.3	13.0	48.7	0.5	1.7	31.4	2.8	3.9	71.6	54.4	0.5	2.6	2.5	17,879	8,638	1,680	2,959	539	40	1,347	1,046	+2899
8	Josh Smith J. Smith	534	33.8	14.6	7.7	3.0	1.3	2.2	5.6	12.0	46.6	0.3	1.2	28.2	3.1	4.6	67.5	52.2	2.1	5.6	2.5	18,065	7,805	4,136	1,592	670	1,189	1,325	1,568	-323
9	Bismack Biyombo B. Biyombo	529	20.9	5.0	6.5	0.5	0.3	1.4	1.9	3.7	51.3	0.0	0.0	0.0	1.2	2.2	56.6	54.0	2.0	4.5	0.9	11,053	2,644	3,413	255	138	762	495	1,189	-1603
10	Kevin Garnett K. Garnett	529	37.6	18.9	9.9	4.1	1.4	1.7	7.7	15.9	48.4	0.2	0.6	31.3	3.3	4.3	75.7	53.0	2.7	7.2	2.5	19,910	9,994	5,252	2,155	735	924	1,339	1,357	+1227
11	Giannis Antetokounmpo G. Antetokounmpo	528	32.5	20.1	8.9	4.3	1.2	1.3	7.3	13.9	52.6	0.6	2.1	28.4	4.8	6.7	72.2	59.5	1.7	7.2	2.8	17,137	10,602	4,700	2,275	620	692	1,458	1,589	+1194
12	Jermaine O'Neal J. O'Neal	519	25.9	12.3	7.3	1.1	0.5	1.8	4.8	10.3	46.5	0.0	0.1	15.9	2.7	4.0	67.8	51.1	2.1	5.2	1.6	13,436	6,395	3,776	591	251	924	839	1,389	+770
13	Enes Kanter Freedom E. Kanter Freedom	516	21.9	11.7	7.3	0.7	0.4	0.5	4.8	8.8	53.9	0.1	0.2	29.4	2.1	2.7	77.9	58.3	2.8	4.5	1.6	11,309	6,031	3,777	374	204	234	804	1,129	-539
14	Thaddeus Young T. Young	516	30.1	13.7	5.5	1.4	1.4	0.4	5.8	11.7	50.0	0.4	1.3	32.1	1.6	2.3	70.0	53.9	2.0	3.5	1.4	15,516	7,078	2,845	704	708	204	717	1,125	-65
15	Carmelo Anthony C. Anthony	514	36.5	24.7	6.2	3.1	1.1	0.4	8.9	19.3	45.9	0.7	2.3	30.8	6.3	7.9	80.1	54.4	2.0	4.2	3.1	18,747	12,711	3,184	1,589	591	229	1,584	1,559	+1076
16	JR Smith	503	23.9	12.5	2.8	2.0	0.9	0.2	4.4	10.3	42.8	1.8	4.8	37.1	1.9	2.5	74.1	54.7	0.5	2.3	1.5	12,035	6,289	1,410	1,004	472	86	749	1,053	+652
17	Chris Bosh C. Bosh	501	37.0	20.1	9.4	2.2	0.8	1.2	7.1	14.4	49.1	0.1	0.3	29.9	5.9	7.4	79.6	57.0	2.7	6.7	2.2	18,535	10,090	4,702	1,093	388	592	1,108	1,312	+213
18	Eddy Curry E. Curry	501	25.8	13.5	5.4	0.6	0.3	0.8	5.1	9.3	54.6	0.0	0.0	100.0	3.3	5.1	64.3	58.2	1.9	3.5	2.3	12,928	6,750	2,692	286	155	381	1,146	1,520	-1802
19	Spencer Hawes S. Hawes	500	24.9	9.7	6.4	2.0	0.4	1.1	4.1	8.7	46.5	0.5	1.3	36.1	1.1	1.5	70.3	51.4	1.7	4.7	1.6	12,436	4,830	3,200	993	203	542	803	1,348	-1466
20	Jayson Tatum J. Tatum	495	34.2	23.0	7.2	3.5	1.1	0.7	8.0	17.4	46.1	2.5	6.7	37.4	4.4	5.3	84.4	58.2	0.9	6.3	2.3	16,925	11,381	3,546	1,719	545	336	1,134	1,043	+2992
21	Tyson Chandler T. Chandler	492	27.7	8.2	9.0	0.9	0.6	1.4	3.1	5.5	55.5	0.0	0.0	0.0	2.0	3.4	60.0	58.2	3.1	5.9	1.6	13,616	4,016	4,448	446	274	700	775	1,539	-60
22	Bradley Beal B. Beal	488	34.4	19.8	3.9	3.7	1.1	0.4	7.3	16.2	45.2	2.2	5.7	38.4	3.0	3.8	79.8	55.6	0.8	3.1	2.1	16,779	9,684	1,927	1,824	551	191	1,047	1,074	+590
23	Marvin Williams M. Williams	487	30.4	11.5	5.3	1.3	0.8	0.4	4.1	9.1	45.0	0.4	1.3	32.9	2.9	3.6	80.6	53.9	1.4	3.9	1.2	14,822	5,616	2,582	654	385	213	580	1,118	-172
24	Jarrett Allen J. Allen	486	28.2	12.7	9.1	1.6	0.6	1.3	5.1	8.0	63.0	0.0	0.2	17.1	2.6	3.6	71.1	66.2	2.9	6.3	1.4	13,724	6,185	4,441	790	294	630	670	986	+258
25	Andrew Wiggins A. Wiggins	485	35.5	19.6	4.4	2.3	1.0	0.7	7.2	16.4	44.3	1.2	3.7	33.6	3.8	5.3	73.0	52.4	1.2	3.1	2.1	17,242	9,491	2,124	1,132	475	316	1,013	1,056	-689