Valoti lahir di [[Vicenza]] pada 6 September 1993, anak dari seorang pesepakbola [[Aladino Valoti]], yang pernah bermain di beberapa klub [[Serie A]] dan [[Serie B]] pada akhir 80-an dan 90-an dan sekarang menjadi direktur olahraga di [[U.C. AlbinoLeffe|Albinoleffe]].<ref>{{cite news |title=Mattia Valoti |url=http://sport.sky.it/sport/calcio_italiano/2011/01/26/giovani_talenti_serie_b_mattia_valoti_albinoleffe.html |work=skt.it |publisher=[[SKY Italia]] |date=31 January 2011 |accessdate=2 September 2011 |language=Italian}}</ref> Mattia mulai bermain sepakbola pada umur 5 tahun di akademi [[A.S. Lucchese Libertas|Lucchese]], the club where his father was playing at the time. Over the next eight years, Mattia played for several clubs, namely [[Nuova Cosenza Calcio|Cosenza]], [[U.S. Città di Palermo|Palermo]], [[F.C. Crotone|Crotone]], [[A.S.D. Martina Franca|Martina Franca]] and Dalmine Futura, as a result of his father's [[Transfer (association football)|transfers]].<ref name="bio">{{cite news |title=Mattia Valoti |url=http://www.tuttonazionali.com/?action=read&idnotizia=617 |author=Alessandro Paoli |work=tuttonazionali.com |date=14 July 2011 |accessdate=2 September 2011 |language=Italian}}</ref>
=== Albinoleffe ===
Pada 2006, Valoti berlabuh ke [[U.C. AlbinoLeffe|Albinoleffe]], menghabiskan lima musim di level junior. Kemudian dia memulai debut profesional saat usia 17, datang sebagai [[Substitute (association football)|substitute]] pada laga [[Coppa Italia]] lawan Crotone, pada 27 Oktober 2010. Tiga hari kemudian, dia juga memulai debut senior di [[Serie B]] , sebagai pemain pengganti pada laga melawan [[Novara Calcio|Novara]].<ref name="bio"/> Pada Januari 2011 [[transfer window]], klub [[Serie A]] [[A.C. Milan|Milan]] mengontrak Valoti dengan kepemilikan bersama, though allowing him to stay at Albinoleffe for the remainder of the season.<ref>{{cite news |title=Mattia Valoti al Milan |url=http://www.albinoleffe.com/settore-giovanile/news-settore-giovanile/2151-mattia-valoti-al-milan.html |work=albinoleffe.com |publisher=[[U.C. AlbinoLeffe|Unione Calcio Albinoleffe]] |date=19 January 2011 |accessdate=2 September 2011 |language=Italian}}</ref>
At the beginning of the 2011–12 campaign, the [[Co-ownership (football)|co-ownership]] deal was renewed and Valoti joined Milan,<ref>{{cite web |title=Risoluzione accordi di partecipazione |url=http://www.legaseriea.it/c/document_library/get_file?uuid=03906b62-a7b9-4a9d-b2f8-4e87e36e4c8e&groupId=10192 |format=PDF |work=legaseriea.it |publisher=[[Lega Serie A|Lega Nazionale Professionisti Serie A]] |accessdate=2 September 2011 |language=Italian}}</ref> taking part in the [[Pre-season#Preseason|pre-season]] trainings and [[Exhibition game|friendlies]] with the first team.<ref>{{cite news |title=Buona la pre-season dei "canterani" rossoneri in prima squadra |url=http://www.milannews.it/?action=read&idnotizia=59197 |author=Pietro Mazzara |work=milannews.it |date=17 August 2011 |accessdate=2 September 2011 |language=Italian}}</ref> He was named as a substitute for the first time on the 18th of September, 2011 in a match against [[SSC Napoli]] but was an unused substitute.
