Gianluigi Donnarumma has made the most career appearances by a player younger than 21 in Serie A, with 166 appearances.

most apearances by a player before turning 21 years old

	NAME	M	MIN	START	G	G/M	A	G+A	PK	FK	SH	SOT	WOOD	TCH	TCH-BOX	OFF
1	Gianluigi Donnarumma G. Donnarumma	166	14,683	166	0	0.00	0	0	0	0	1	1	0	6,316	3	0
2	Gianni Rivera G. Rivera	136	12,240	136	39	0.29			1
3	Silvio Piola S. Piola	127	11,340	127	51	0.40			0
4	Gino Colaussi G. Colaussi	119	10,710	119	17	0.14			0
5	Roberto Mancini R. Mancini	114	8,578	96	25	0.22			2
6	Nereo Rocco N. Rocco	113	10,080	113	19	0.17			0
7	Mario Corso M. Corso	110	9,855	110	30	0.27			1
8	Paolo Maldini P. Maldini	109	9,661	108	3	0.03			0
9	Bruno Nicolè B. Nicolè	104	9,360	104	35	0.34			0
10	Pietro Ferraris P. Ferraris	103	9,225	103	21	0.20			0
11	Giuseppe Bergomi G. Bergomi	101	8,850	100	4	0.04			0
12	Antonio Cassano A. Cassano	97	5,253	52	20	0.21			0
13	Giuseppe Virgili G. Virgili	96	8,640	96	46	0.48			1
14	Paolo Pestrin P. Pestrin	94	8,460	94	10	0.11			0
15	Christian Obodo C. Obodo	93	6,938	76	3	0.03			0
16	Renato Buso R. Buso	92	5,309	55	16	0.17			0
17	Giancarlo Bacci G. Bacci	92	8,190	92	25	0.27			2
18	Onesto Silano O. Silano	91	8,147	91	26	0.29			5
19	Marino Perani M. Perani	89	8,010	89	18	0.20			1
20	Amedeo Amadei A. Amadei	88	7,920	88	39	0.44			0
21	Francesco Totti F. Totti	87	5,291	58	12	0.14			0
22	Valeri Bozhinov V. Bozhinov	86	4,381	52	22	0.26			0
23	Gianluigi Buffon G. Buffon	86	7,606	84	0	0.00			0
24	Giorgio Scalvini G. Scalvini	85	5,666	69	4	0.05	5	9	0	0	52	13	3	4,441	108	10
25	Massimo Mauro M. Mauro	84	6,477	70	2	0.02			0