He started his senior career in Serie D with Troina. On 31 January 2018, he signed with Parma (in Serie B at the time), who loaned him back to Troina for the rest of the 2017–18 season.[1]
For the 2018–19 season he joined Serie C club Siracusa on loan.
He made his professional Serie C debut for Siracusa on 25 September 2018 in a game against Paganese. He substituted Marco Palermo in the 81st minute.[2] He made his first start for Siracusa on 21 October 2018 in a game against Potenza. He finished the loan with 16 appearances, including 9 in the starting line-up.
On 13 August 2021, he signed with Serie D club Acireale.[4] On 4 December 2021, he moved on loan to Paternò, also in Serie D.[5] On 30 December 2021, he signed for Troina.[6] In July 2022 he then moved to Oratorio S. Ciro E Giorgio,[7] and then to CUS Palermo in January 2023.[8] In the summer 2023, Mustacciolo joined Athletic Club Palermo.[9]
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