|Full name||Lucas Martín Valdemarín|
|Date of birth||May 13, 1978|
|Place of birth||Rio Tercero, Argentina|
|Height||1.73 m (5 ft 8 in)|
|Defensa y Justicia|
|1982–1996||Sportivo 9 de Julio|
|1996||Talleres de Córdoba||2||(0)|
|1999||→ Independiente Rivadavia (loan)||15||(8)|
|2001||→ Unión Española (loan)||2||(0)|
|2005||→ Elche CF (loan)||4||(0)|
|2005–2006||→ Racing Club (loan)||16||(3)|
|2006–2007||Arsenal de Sarandí||32||(8)|
|2008–2009||Colón de Santa Fe||17||(2)|
|2009||→ San Luis (loan)||3||(0)|
|2009–2010||Defensa y Justicia||19||(6)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 16:35, 18 July 2009 (UTC).
Lucas Martín Valdemarín (born 13 May 1978 in Río Tercero, Argentina) is a former footballer from Argentina who played for Vélez, Unión Española (Chile), Elche (Spain), AIK (Sweden) and Club San Luis (Mexico).
Valdemarín developed his career as a youth with Sportivo 9 de Julio. In 1996, he was signed by Talleres de Córdoba, but shortly after Vélez Sársfield acquired his playing rights. During his period at Vélez Valdemarín struggled to earn a spot in the first team, and the club loaned him to other teams multiple times: to Independiente Rivadavia and Racing Club in Argentina, Unión Española of Chile and Elche CF from Spain, with two more spells with Vélez in between.
In 2006, he became a free agent and signed for Arsenal de Sarandí, where he formed a striker partnership with Mauro Óbolo. The following year, both relocated to Sweden to play for AIK Fotboll. In 2008 Valdemarín reached a mutual agreement with AIK to terminate his the contract, and joined Colón de Santa Fe. He was a starter at the beginning, but his due to his lack of effectivity he was relegated to the bench. During the first semester of 2009, he had a brief spell in Mexico with San Luis F.C.  Back in Colón he couldn't secure a place in the squad, and transferred to Defensa y Justicia in July 2009. In June 2010 ends his career.
- (Spanish) Argentine Primera statistics