|Full name||Ariel Alfredo Montenegro Casella|
|Date of birth||3 November 1975|
|Place of birth||Buenos Aires, Argentina|
|Height||1.78 m (5 ft 10 in)|
|* Senior club appearances and goals counted for the domestic league only.
Born in Buenos Aires, Montenegro played in his country for San Lorenzo de Almagro, Club Atlético Belgrano and Club Atlético Independiente, teaming up with sibling Daniel in the latter. In 2000, he moved to Spain, signing with Segunda División's Córdoba CF and remaining in the country the following eight years, without however making his debuts in La Liga; he also teamed up for CD Numancia and Hércules CF in the category.
In the latter nation, Montenegro represented Pontevedra CF and Lucena CF in Segunda División B, returning to his homeland in between to play for Gimnasia y Esgrima de Jujuy. In 2010, he moved back to Spain and joined lowly Peñarroya CF, retiring at nearly 37 after one season with the club – his second – in the regional championships.
- Los Montenegro gritaron goles en dos direcciones (The Montenegro shouted goal in two directions); Clarín, 14 March 2009 (in Spanish)