Sosa in action for Peñarol in 2010
|Full name||Marcelo Fabián Sosa Farías|
|Date of birth||2 June 1978|
|Place of birth||Montevideo, Uruguay|
|Height||1.78 m (5 ft 10 in)|
|2005–2006||→ Osasuna (loan)||11||(0)|
|2006||→ River Plate (loan)||2||(0)|
|* Senior club appearances and goals counted for the domestic league only.
Born in Montevideo, Sosa started his career at Danubio FC, being a mainstay for several seasons. In January 2004 he joined FC Spartak Moscow on a four-year deal, but only six months later he moved to Atlético Madrid in Spain on a free transfer, signing a three-year link with the La Liga club.
Although he appeared in 28 league games during the campaign, Sosa failed to impress, being loaned to fellow league side CA Osasuna where he was used rarely during the Navarrese's historical season (a fourth place). He added two contests in the UEFA Cup.
After another loan, at Club Atlético River Plate in January 2007, Sosa was allowed to join hometown's Club Nacional de Football on another free transfer, despite still having a six-month contract left with Atlético Madrid. On 7 January 2008, Tecos UAG officially presented him to the Guadalajara-area media.
In the 2009 summer 31-year-old Sosa returned to his country, signing with national powerhouse C.A. Peñarol. In early February 2011 he joined fellow Primera División team Racing Club de Montevideo, on a six-month contract.