|Full name||Marcos Sebastián Aguirre|
|Date of birth||March 30, 1984|
|Place of birth||Arroyito, Córdoba, Argentina|
|Height||1.70 m (5 ft 7 in)|
|2008–2009||→ Valladolid (loan)||24||(1)|
|2011||→ Arsenal de Sarandí (loan)||8||(0)|
|2011||→ San Martín de San Juan (loan)||13||(0)|
* Senior club appearances and goals counted for the domestic league only and correct as of 01:12, 14 August 2011 (UTC).
Aguirre started his professional career in 2004 with Club Atlético Lanús, gradually establishing himself as an important member of the first team. In 2007, he was part of the squad that won the Apertura 2007 tournament, Lanús' first ever top flight title.
In January 2008, Aguirre was loaned to Real Valladolid, being unsuccessful during a one 1/2 year stint, as he was mainly used as a substitute. He did, however, score on the last day of the 2008–09 season in a crucial relegation match away to Real Betis which ended 1–1, after having replaced injured Pedro León. Betis eventually relegated with that draw, but the Castile and León outfit maintained its status. Upon the end of his loan spell, Aguirre returned to Lanús in 2009.
Back in Argentina, Aguirre scored the first goal of the 2010–11 Argentine Primera División season in a 2–1 win over Arsenal de Sarandí. At the end of the semester, the winger was loaned again by Lanús, this time to Arsenal de Sarandí.
|Apertura 2007||Lanús||Argentine League|
- Martín Manrupe (2010-08-06). "Arsenal vs Lanús" (in Spanish). Goal.com. Retrieved 2010-09-22.
- "Arsenal sumó a Marcos Aguirre, de Lanús, a préstamo" (in Spanish). Yahoo! Deportes. 2010-12-26. Retrieved 2011-01-02.