|Date of birth||August 30, 1976|
|Place of birth||Milan, Italy|
|Height||1.77 m (5 ft 9 1⁄2 in)|
|Virtus Entella (head coach)|
|2006–2007||Forte dei Marmi||30||(0)|
|* Senior club appearances and goals counted for the domestic league only.
After his retirement, he switched into a coaching staff role at Virtus Entella, serving as first team assistant and successively as youth coach. Under his guidance, the Primavera Under-19 team managed to reach the final of the Coppa Italia Primavera 2017, then lost to Roma 3–1 on aggregate.
On 30 April 2017, Castorini was promoted to the first team head coaching role until the end of the season after Roberto Breda's dismissal following three consecutive losses in the Serie B league which led Virtus Entella out of the promotion playoff zone. On 31 May 2017, Virtus Entella announced Castorina will serve as permanent head coach for the 2017–18 Serie B season.
- "La Roma Primavera stende l’Entella e vince la sua quinta Coppa Italia: è di nuovo festa all'Olimpico" (in Italian). Il Messaggero. 21 April 2017. Retrieved 1 May 2017.
- "Serie B, l'Entella caccia Breda: al suo posto arriva Castorina" (in Italian). La Repubblica. 30 April 2017. Retrieved 1 May 2017.
- "Mister Castorina confermato in prima squadra" (in Italian). Virtus Entella. 31 May 2017. Retrieved 1 June 2017.
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