Tracy McGrady has blocked the most career shots by a player younger than 19, with 61 blocks.

Interpreted as:

most blocks before turning 19 years old by a player

	NAME	BLK	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	TOV	PF	+/-
1	Tracy McGrady T. McGrady	61	64	18.4	7.0	4.2	1.5	0.8	1.0	2.8	6.2	45.0	0.2	0.6	34.1	1.2	1.7	71.2	50.5	1.6	2.6	1.0	1,179	451	269	98	49	66	86	-229
2	Dwight Howard D. Howard	32	17	32.0	10.5	10.4	1.6	1.0	1.9	3.8	6.9	54.7	0.0	0.0		3.0	5.1	58.6	57.6	3.8	6.6	2.2	544	179	177	27	17	38	40	+19
3	Jermaine O'Neal J. O'Neal	26	45	10.2	4.1	2.8	0.2	0.0	0.6	1.5	3.4	45.1	0.0	0.0	0.0	1.0	1.7	60.3	49.4	0.9	1.9	0.6	458	185	124	8	2	27	46	+26
4	LeBron James L. James	23	31	40.2	20.2	5.9	6.1	1.6	0.7	7.6	17.9	42.6	1.0	3.3	31.1	3.8	5.0	77.3	50.1	1.5	4.5	3.9	1,247	625	184	188	49	121	56	-67
5	Kobe Bryant K. Bryant	23	71	15.5	7.6	1.9	1.3	0.7	0.3	2.5	5.9	41.7	0.7	1.9	37.5	1.9	2.3	81.9	54.4	0.7	1.2	1.6	1,103	539	132	91	49	112	102	+60
6	Andrew Bynum A. Bynum	22	46	7.4	1.6	1.7	0.2	0.1	0.5	0.7	1.8	40.2	0.0	0.0		0.2	0.6	29.6	39.4	0.7	1.0	0.4	338	74	80	9	4	17	56	-47
7	Jalen Duren J. Duren	15	13	21.4	6.3	7.4	0.3	0.3	1.2	2.7	4.8	55.6	0.0	0.1	0.0	0.9	2.4	38.7	53.5	2.9	4.5	1.1	279	82	96	4	4	14	27	-69
8	Andris Biedrins A. Biedrins	15	20	11.9	3.7	3.2	0.3	0.5	0.8	1.6	2.6	59.6	0.0	0.1	0.0	0.6	1.3	42.3	57.5	1.2	2.0	0.4	237	73	63	6	9	7	49	+4
9	Darko Milicic D. Milicic	15	34	4.7	1.4	1.3	0.2	0.2	0.4	0.5	1.9	26.2	0.0	0.0	0.0	0.4	0.7	58.3	31.8	0.3	0.9	0.4	159	48	43	7	7	13	33	-45
10	Eddy Curry E. Curry	11	13	12.4	4.4	2.2	0.3	0.2	0.8	1.5	3.6	40.4	0.0	0.0		1.5	2.4	61.3	47.0	0.6	1.6	0.9	161	57	29	4	2	12	23	-44
11	Giannis Antetokounmpo G. Antetokounmpo	9	13	16.2	5.2	3.2	0.9	0.5	0.7	2.1	4.1	50.9	0.5	1.2	40.0	0.6	1.2	50.0	56.6	0.7	2.5	1.0	210	68	42	12	7	13	23	+3
12	Josh Smith J. Smith	9	13	12.7	5.1	2.6	0.8	0.3	0.7	1.9	3.9	49.0	0.0	0.2	0.0	1.2	1.9	64.0	53.2	1.0	1.6	1.2	165	66	34	11	4	16	18	-8
13	Joshua Primo J. Primo	4	8	7.4	2.0	0.8	0.5	0.4	0.5	0.8	1.4	54.5	0.5	1.0	50.0	0.0	0.0		72.7	0.1	0.6	0.0	59	16	6	4	3	0	4	+7
14	Dragan Bender D. Bender	3	9	9.4	3.3	1.0	0.4	0.2	0.3	1.3	3.1	42.9	0.7	1.7	40.0	0.0	0.0		53.6	0.3	0.7	0.3	85	30	9	4	2	3	12	+16
15	Jonathan Bender J. Bender	3	9	4.4	2.2	0.8	0.0	0.0	0.3	0.9	2.3	38.1	0.2	0.6	40.0	0.2	0.4	50.0	43.9	0.0	0.8	0.4	40	20	7	0	0	4	5	-5
16	Cooper Flagg C. Flagg	2	4	31.6	13.0	5.3	2.5	1.0	0.5	4.8	12.5	38.0	1.0	3.8	26.7	2.5	2.5	100.0	47.8	0.5	4.8	2.0	126	52	21	10	4	8	11	-50
17	Amir Johnson A. Johnson	2	3	12.9	6.7	1.3	1.0	0.0	0.7	2.3	3.3	70.0	0.7	1.0	66.7	1.3	1.3	100.0	85.0	1.0	0.3	1.3	39	20	4	3	0	4	7	-22
18	Robert Swift R. Swift	1	7	3.9	0.4	0.0	0.3	0.0	0.1	0.1	0.4	33.3	0.0	0.0		0.1	0.3	50.0	38.7	0.0	0.0	0.0	27	3	0	2	0	0	5	-31