Career
Youth career
Born in Tradate, Lombardy region, Casarini was a player for Legnano"s under-15 team in 2008-2009 season. He then signed by Novara, which he was the captain of the reserve team in 2012-2013 season. Parma
On 29 August 2013 he was swapped with Federico Davighi of Parma in co-ownership deal.
The 50% registration rights of the players were valued at €600,000.
Casarini signed a 5-year contract, while Davighi signed a 3-year contract. He also received a call-up from Italy under-20 team on 2 September, However along with Benassi, Insigne and Nicolao, they were axed from the final 20-men line-up on 6 September, with Padovan as an additional call-up.
Casarini also joined Viareggio in temporary deal on 2 September. However Casarini only played once in 2013-2014 Lega Pro Prima Divisione season.
On 30 January 2014 Casarini returned to Novara Calcio in temporary deal.
Casarini did not play any game in 2014-2015 Serie B either. On 20 June 2014 the co-ownership deals were renewed. On 1 September 2014 he was signed by another third division club Savona.
On 2 February 2015 he was swapped with Nicolò Tonon, whom on loan at Bassano from Atalanta.
