|Full name||Marco Mancosu|
|Date of birth||22 August 1988|
|Place of birth||Cagliari, Italy|
|Height||1.77 m (5 ft 10 in)|
|2008–2009||→ Rimini (loan)||5||(0)|
|2009–2010||→ Empoli (loan)||7||(0)|
|2011–2012||→ Siracusa (loan)||36||(8)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 13:15, 19 August 2020 (UTC)|
Born in Cagliari, Sardinia, Mancosu started his career with hometown club Cagliari Calcio and made his first team debut in the last round of 2006–07 season, also scoring a goal in his first top-flight appearance, and then made 10 first team appearances in the following 2007–08 season.
On 13 August 2010, it was confirmed that Mancosu was sold to Lega Pro Prima Divisione side U.S. Siracusa, on a co-ownership deal. The Sicilian club, recently underwent a second consecutive promotion from the Serie D in 2008 to the Lega Pro Prima Divisione this season.
In June 2011, Cagliari bought back Mancosu from the co-owner.
In August 2011, he returned to Siracusa on a season-long loan deal. Mancosu was a key person for Siracusa successful campaign which was the first before the winter break.
In 2012, he moved to Benevento, where he spent two years.
In 2014, he was signed by Casertana, where he spent two seasons.
In July 2016 he joined Lecce. He made his debut with the giallorossi side on 30 July 2016, in a 2–1 home win against AltoVicentino in the Coppa Italia. He was a regular starter for the team in Lega Pro during the 2016–17 and 2017–18 seasons. On 27 August 2018 he scored in an away fixture against Benevento, in his first Serie B game in eight years. In January 2019, he was named the team's new captain, as his predecessor, Franco Lepore, had recently been sold by the club.
On 12 August 2009, he made his debut with the Italy under-21 team in a friendly game against Russia. Mancosu played all 5 matches of 2005 UEFA European Under-17 Football Championship and all 3 matches of 2005 FIFA U-17 World Championship.
- "Mancosu al Rimini. Rescisso il contratto di Shala" (in Italian). Cagliari Calcio. 10 July 2008. Archived from the original on 17 July 2008. Retrieved 13 July 2008.
- "Marco Mancosu". Sky Sports. Retrieved 18 August 2009.
- Massimo Leotta (2 March 2012). "La Mancosu story Così tre fratelli si sfidano nei gol" (in Italian). La Gazzetta dello Sport. Retrieved 4 March 2017.