Isiah Thomas has the most career assists by a player younger than 27, with 4,992 assists.

Interpreted as:

most assist by a player before age 27

	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	Isiah Thomas I. Thomas	4,992	483	37.1	21.1	3.9	10.3			8.1	17.3	46.7	0.3			4.6	6.0	76.3	52.9				17,919	10,179	1,890				1,642
2	Chris Paul C. Paul	4,771	485	37.0	18.8	4.5	9.8	2.4	0.1	6.6	14.1	47.2	0.9	2.6	36.1	4.6	5.4	85.4	57.3	0.7	3.7	2.5	17,942	9,125	2,164	1,162	40	1,189	1,221	+1194
3	Trae Young T. Young	4,748	483	34.4	25.3	3.5	9.8	1.0	0.2	8.0	18.5	43.3	2.6	7.5	35.2	6.7	7.6	87.3	57.9	0.6	2.9	4.2	16,621	12,220	1,687	505	74	2,051	841	-121
4	John Wall J. Wall	4,610	500	36.1	18.8	4.4	9.2	1.7	0.6	6.8	15.8	43.3	0.9	2.7	32.1	4.3	5.5	79.1	51.8	0.6	3.8	3.8	18,030	9,419	2,217	870	322	1,912	1,138	+173
5	Stephon Marbury S. Marbury	4,584	556	38.5	20.5	3.1	8.2	1.3	0.2	7.3	17.0	43.2	1.2	3.8	31.9	4.6	5.9	78.4	52.4	0.8	2.3	3.3	21,401	11,392	1,707	700	94	1,813	1,353	-307
6	LeBron James L. James	4,382	630	40.1	27.7	7.1	7.0	1.7	0.9	9.9	20.5	47.9	1.4	4.2	32.9	6.6	8.9	74.5	56.6	1.2	5.9	3.3	25,282	17,460	4,473	1,086	537	2,094	1,239	+2960
7	Deron Williams D. Williams	4,156	451	35.7	17.2	3.2	9.2	1.1	0.2	6.2	13.3	46.3	1.2	3.3	35.5	3.7	4.6	80.8	56.0	0.5	2.7	3.1	16,087	7,756	1,462	476	104	1,380	1,219	+939
8	Kevin Johnson K. Johnson	4,090	418	34.6	18.4	3.4	9.8	1.6	0.3	6.5	13.0	49.6	0.1	0.4	19.0	5.4	6.4	84.2	58.0	0.6	2.8	3.2	14,447	7,697	1,415	663	109	1,352	934
9	Rajon Rondo R. Rondo	3,943	475	32.9	11.1	4.5	8.3	1.9	0.1	4.6	9.5	48.1	0.2	0.7	24.1	1.7	2.8	62.1	51.4	1.1	3.4	2.8	15,649	5,251	2,156	913	66	1,314	1,074	+2038
10	Luka Dončić L. Dončić	3,854	467	35.0	28.9	8.6	8.3	1.2	0.5	9.7	20.8	46.8	3.1	8.8	34.9	6.3	8.4	75.4	58.9	0.9	7.7	4.0	16,340	13,473	4,038	582	214	1,851	1,070	+1315
11	Jason Kidd J. Kidd	3,848	414	37.3	13.6	6.2	9.3	2.1	0.3	5.0	12.3	40.3	1.1	3.2	32.7	2.6	3.5	74.0	49.1	1.7	4.5	3.3	15,460	5,628	2,564	860	143	1,357	813	+904
12	John Stockton J. Stockton	3,745	396	27.1	10.3	2.2	9.5	2.3	0.2	3.7	7.1	52.7	0.1	0.5	25.8	2.7	3.3	81.7	60.2	0.5	1.7	2.5	10,739	4,079	873	893	60	994	1,095
13	Russell Westbrook R. Westbrook	3,706	515	34.0	21.2	5.3	7.2	1.7	0.3	7.4	17.2	43.2	0.8	2.7	30.5	5.5	6.7	81.9	52.6	1.6	3.6	3.6	17,511	10,926	2,719	874	147	1,879	1,246	+1687
14	Magic Johnson M. Johnson	3,579	295	36.7	17.8	7.0	12.1			6.6	12.0	54.9	0.1	0.4	17.8	4.6	5.5	83.3	61.9				10,839	5,264	2,077				657
15	Tony Parker T. Parker	3,455	612	33.2	16.7	3.1	5.6	1.0	0.1	6.6	13.5	49.0	0.5	1.6	31.3	2.9	4.0	72.6	54.5	0.5	2.6	2.5	20,335	10,219	1,903	606	44	1,533	1,156	+3225
16	Mike Bibby M. Bibby	3,348	511	36.5	16.1	3.4	6.6	1.4	0.2	6.1	13.5	44.9	1.1	3.1	36.9	2.7	3.5	79.2	53.3	0.7	2.7	2.5	18,661	8,203	1,724	712	103	1,280	1,004	+130
17	Kenny Anderson K. Anderson	3,275	424	33.8	15.7	3.5	7.7	1.6	0.2	5.6	13.5	41.6	0.9	2.6	34.2	3.6	4.6	79.4	50.8	1.0	2.6	2.5	14,345	6,668	1,491	697	78	1,080	993	+342
18	Baron Davis B. Davis	3,268	463	34.9	15.9	3.9	7.1	1.9	0.4	5.7	14.1	40.7	1.7	5.2	32.7	2.7	4.0	66.8	49.9	1.0	2.9	2.7	16,160	7,341	1,806	858	179	1,257	1,326	+892
19	Raymond Felton R. Felton	3,198	474	35.2	13.7	3.4	6.7	1.5	0.2	5.1	12.3	41.2	1.0	3.1	33.3	2.5	3.1	78.6	49.9	0.7	2.8	2.6	16,677	6,475	1,635	690	93	1,242	1,058	-183
20	Terry Porter T. Porter	3,174	395	31.8	14.1	3.7	8.0	1.7	0.1	5.1	10.5	48.4	0.5	1.5	34.7	3.4	4.0	85.1	57.5	0.8	2.9	2.7	12,577	5,558	1,451	673	38	1,079	856
21	Mark Jackson M. Jackson	3,156	379	31.3	12.0	4.0	8.3	1.6	0.1	4.8	10.4	45.8	0.4	1.5	28.9	2.0	2.8	74.2	51.7	1.3	2.7	2.7	11,880	4,550	1,517	616	39	1,013	741
22	Jrue Holiday J. Holiday	3,147	504	32.3	14.3	3.6	6.2	1.5	0.4	5.6	12.8	44.1	1.1	3.1	36.6	1.8	2.3	78.8	51.5	0.8	2.8	2.7	16,256	7,191	1,800	732	198	1,358	1,146	+291
23	Nikola Jokić N. Jokić	3,107	505	30.2	19.2	10.2	6.2	1.2	0.7	7.4	13.7	53.8	1.0	3.0	35.1	3.4	4.1	83.1	61.9	2.6	7.6	2.7	15,251	9,712	5,155	588	351	1,378	1,406	+2078
24	De'Aaron Fox D. Fox	3,041	497	33.1	21.5	3.9	6.1	1.4	0.4	7.9	16.8	47.2	1.5	4.5	33.3	4.1	5.5	74.0	55.8	0.6	3.3	2.8	16,461	10,673	1,924	712	204	1,373	1,294	-402
25	Ricky Rubio R. Rubio	3,011	355	31.8	10.4	4.2	8.5	2.1	0.1	3.2	8.6	37.5	0.7	2.2	31.4	3.2	3.9	83.1	50.3	0.7	3.5	2.8	11,281	3,681	1,508	751	45	983	926	+325