|Date of birth||3 June 1993|
|Date of death||3 October 2021(aged 28)|
|2012–2013||→ Pontedera (loan)||32||(0)|
|2013–2014||→ Reggiana (loan)||2||(0)|
|2014||→ Torres (loan)||19||(0)|
|* Senior club appearances and goals counted for the domestic league only|
Leone played for Reggina, Pontedera, Reggiana, Torres, Latina and Catanzaro. Two of the clubs were in Serie B, but he never played higher than Serie C. He retired in 2017 after being diagnosed with a tumour in 2014. He died in October 2021 aged 28.
- Daniel Leone at Soccerway. Retrieved 5 October 2021.
- "Morto a 28 anni Daniel Leone, l'ex portiere di Reggina e Catanzaro stroncato da un tumore". La Gazzetta dello Sport.