|Date of birth||19 July 1986|
|Place of birth||Rome, Italy|
|Height||1.84 m (6 ft 1⁄2 in)|
|2003–2004||→ Astrea (loan)||18||(1)|
|2006–2008||→ Verona (loan)||41||(3)|
|2009–2010||→ Pisa (loan)||8||(0)|
|2010–2011||→ Piacenza (loan)||22||(0)|
|2015||→ Hellas Verona (loan)||18||(0)|
|2018||→ Foggia (loan)||17||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 18 January 2019|
A midfielder, Greco was a regular in the Roma youth squad. He made his Serie A debut for AS Roma in 2004–05. In 2005–06, Greco managed to make only a handful of appearances, all as a substitute player.
Verona, Pisa & Piacenza
He was farmed to Hellas Verona for the following two seasons, playing a total of 40 games (26 in his first season, 14 in his second). Verona acquired half of the registration rights in June 2007 for €300,000, but bought back by Roma in June 2008 for just €150,000.
He played the second half of 2008–09 on loan to Pisa of Serie B. His loan stint was cut short in January 2010, and Greco was successively sent to another Serie B club, Piacenza, for the remainder of the season.
Return to Roma
Greco returned to Roma for the 2010–11 season and was immediately put on transfer list, but no club showed interest in signing him, so he was placed on the first team instead. An injury crisis head coach Claudio Ranieri to bring him on the bench for a UEFA Champions League game against FC Basel, during which Greco entered as a substitute for the final 15 minutes and scored a goal only one minute after entering; the game ended in a 3–2 win for Roma. Greco's good performances led Ranieri to call him up for the Rome derby, during which he came on for injured Jérémy Menez during the first half and provided a solid performance in a 2–0 win for his side. He was promoted to the starting lineup for subsequent games against Fiorentina and Juventus.
Greco's contract was extended along with Daniele De Rossi and Simone Perrotta in February 2012. Greco signed a new 3-year contract with annual gross salary of €1.254 million plus bonuses, moreover, 2011–12 season gross salary also increased to €0.8 million.
In July 2012, Greek Champions Olympiacos signed the 26 year old Leandro Greco for three years on a free transfer. Leandro scored his first goal for the Peireus outfit in the Champions League game against Montpellier HSC (3–1 home win).
- "BIRINDELLI, MASIERO, PIT E GRECO: UN POKER D'ASSI PER IL PISA DI MISTER VENTURA" (in Italian). Pisa Calcio. 21 July 2008. Archived from the original on 23 July 2008. Retrieved 21 July 2008.
- "Greco: "È andata bene e sono molto contento"" (in Italian). Corriere dello Sport – Stadio. Archived from the original on 13 October 2012. Retrieved 7 November 2010.
- "Restorative win has Totti looking forward". UEFA.com. 4 November 2010. Retrieved 7 November 2010.
- "Prolungato Il Contratto Economico Per Le Prestazioni Sportive Del Calciatore Leandro Greco" (PDF) (in Italian). AS Roma. 13 February 2012. Retrieved 1 May 2012.
- "Pre-season training camp in Riscone: AS Roma squad list". AS Roma. 4 July 2012. Retrieved 30 June 2014.
- "last afternoon session with tactical focus". AS Roma. 16 July 2012. Retrieved 30 June 2014.
- "Leandro Greco joins Olympiacos FC". Olympiacos. 24 July 2012. Retrieved 30 June 2014.
- "Greco: il Livorno mi voleva da tempo" (in Italian). AS Livorno Calcio. 31 July 2013. Archived from the original on 2 July 2014. Retrieved 30 June 2014.
- "Risoluzione consensuale con Greco" (in Italian). AS Livorno Calcio. 20 June 2014. Archived from the original on 30 June 2014. Retrieved 30 June 2014.
- "LEANDRO GRECO UFFICIALE AL GENOA" (in Italian). Genoa CFC. 20 June 2014. Retrieved 30 June 2014.
- "IL CENTROCAMPISTA LEANDRO GRECO IN GRIGIOROSSO" (in Italian). Cremonese. 6 July 2018.
- "UFFICIALE: Foggia, torna il centrocampista Greco" (in Italian). Retrieved 18 January 2019.