|Full name||Ángel Gastón Casas Jorge|
|Date of birth||10 January 1978|
|Place of birth||Buenos Aires, Argentina|
|Height||1.82 m (6 ft 0 in)|
|2003–2004||→ Racing Club (loan)||13||(2)|
|2010–2011||→ Gimnasia LP (loan)||10||(2)|
|* Senior club appearances and goals counted for the domestic league only.
Born in Buenos Aires, Casas started playing professionally with Club Atlético Huracán, moving in 2000 to Spain with Real Betis and helping the Andalusian team achieve promotion to La Liga in his first season. Due to the years spent in the latter country, he eventually gained dual nationality.
Casas returned to Argentina in 2003, representing Racing Club de Avellaneda and Argentinos Juniors, but made the switch back to Spain two years later, consecutively playing in the country's second division with Recreativo de Huelva, Elche CF, Cádiz CF and Córdoba CF. In the 2005–06 campaign, he finished fifth in the topscorer's chart at 14 as the first club returned to La Liga after a three-year absence.
On 29 August 2009, Casas moved teams again but stayed in the country, joining AE Larissa FC on a one-year contract. However, in January 2010, he returned to Argentina, signing with Club de Gimnasia y Esgrima La Plata on loan.
- "Gastón Casas adquiere la nacionalidad española" [Gastón Casas acquires Spanish nationality] (in Spanish). Diario AS. 16 March 2004. Retrieved 17 February 2016.
- "Gastón Casas se convierte en el segundo fichaje del Cádiz" [Gastón Casas becomes Cádiz's second signing] (in Spanish). Diario AS. 17 July 2007. Retrieved 17 February 2016.
- "Llega más pólvora para el ataque: Gastón Casas" [More firepower for offense: Gastón Casas] (in Spanish). Diario AS. 1 August 2008. Retrieved 17 February 2016.
- "Goleadores de 2005–2006" [2005–2006 top scorers] (in Spanish). El Mundo. 2006. Retrieved 17 February 2016.
- Dos caras nuevas para Gimnasia (LP) (Two new faces for Gimnasia (LP)); Cancha Llena, 25 January 2010 (in Spanish)