|Full name||Paolo Castellini|
|Date of birth||25 March 1979|
|Place of birth||Brescia, Italy|
|Height||1.84 m (6 ft 1⁄2 in)|
|Playing position||Left back|
|2004||→ Brescia (loan)||16||(0)|
|2010–2011||→ Roma (loan)||8||(0)|
|2011–2012||→ Sampdoria (loan)||20||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 26 March 2014.
† Appearances (Goals).
Born in Brescia, Lombardy, Castellini joined made his professional debuts at U.S. Cremonese at only 17, going on to appear for the club in both the Serie B and Serie C1. In the 2000 summer he moved to Torino FC, achieving promotion to Serie A in his debut season whilst appearing in 33 games.
From January 2004, Castellini served a loan at hometown's Brescia Calcio in the top division – Torino had been again relegated – after which he was released by Toro. In the ensuing summer he moved abroad and signed with Real Betis of Spain, on a five-year contract; however, his spell in Andalusia would be disastrous, as he never dislodged veteran Luis Fernández from his starting position, also suffering with injuries (torn ligaments and cartilage in his right knee).
After cancelling his link to Betis, Castellini returned to his country in the summer of 2006, joining Parma F.C. and being an automatic first-choice from the beginning. In his third season he played in 41 out of 42 matches, helping the club return to Serie A after only one year.
In the 2009–10 campaign, Castellini often played as wingback in a 3–5–2 or 5–3–2 formation, with Cristian Zaccardo in the other flank. He helped Parma to a final eighth position, narrowly missing out on qualification to the UEFA Europa League.
- Vitesse agree Yakubu loan; UEFA.com, 13 July 2004
- Acquisto a titolo temporaneo, con diritto di opzione per l’acquisizione a titolo definitivo, dei diritti alle prestazioni sportive del calciatore Paolo Castellini (Temporary acquisition, with option for permanent transfer of footballer Paolo Castellini); Roma's official website, 26 August 2010 (Italian)
- Castellini resta alla Sampdoria, Biabiany al Parma (Castellini stays with Sampdoria, Biabiany to Parma); Sampdoria's official website, 9 July 2012 (Italian)