Career
Youth career
Born in Crema, Lombardy, Piras started his career at hometown club PergoCrema. In August 2008 Piras left for AlbinoLeffe. Piras also received his only call-up from Italy national team in February 2009, for the U-17 team
On 11 August 2009 Piras was signed by Genoa in co-ownership deal for €100,000.
Senior career
In June 2011 Pergocrema gave up the remain 50% registration rights of Piras to Genoa for free. In July 2011 Piras was transferred to Lega Pro Prima Divisione club SPAL in another co-ownership deal, for a peppercorn fee of €500, rejoining former Leffe teammate Andrea Beduschi.
Piras also selected to the prima divisione Group A under-21 representative team, for 2012 Lega Pro Quadrangular Tournament.