|Full name||Mark Léster Blanco Pineda|
|Date of birth||January 17, 1989|
|Place of birth||Soyapango, El Salvador|
|Height||1.77 m (5 ft 10 in)|
|1997–2004||Fútbol Blanco Sport|
|2008–2009||→ Chalatenango (loan)||28||(5)|
|2012–2012||→ Kongsvinger (loan)||9||(0)|
|2012–2013||→ Marathón (loan)||14||(6)|
|2013–2014||→ Real España (loan)||10||(3)|
|2014||Luis Angel Firpo||17|
|2008–2009||El Salvador U20||6||(3)|
|2010–2011||El Salvador U21||(1)|
|2011–2012||El Salvador U23||6||(4)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 10 March 2013.
† Appearances (Goals).
Blanco came through the youth ranks at the Fútbol Blanco Sport and made his debut at Second division side Atlético Marte in 2004. After a year and another at Telecom he joined Nejapa and later moved on to Chalatenango on loan before returning to Marte. He joined Metapán for the 2010 Clausura.
He was on a trial with Norwegian club Kongsvinger in January 2012, and the club wanted to sign Blanco. However, nothing happened until the Norwegian transfer window closed on 31 March, but Kongsvinger announced on 30 May that Blanco would join them on loan from 1 August until the end of the season in November. The club was close to bankruptcy and was not able to sign Lester on a permanent deal.
On January 2, he signed for a season loan with Marathón. He spent the 2012–13 clasura with them. After he signed another loan deal with Real España. He returned to El Salvador to sign with Firpo at the end of the season.
Blanco made his debut for El Salvador in an October 2007 friendly match against Costa Rica. Lester Blanco Scored his first goal with El Salvador in March 29, 2011 in a 2-3 Lost against Jamaica. Lester Blanco played in the "2011'Gold Cup Tournament" and scored one goal in that event in a 6-1 victory against Cuba. In October 7, 2011 Lester Blanco Scored Goal that lead to a 2-1 Victory against Dominica Republic. In November 2 Lester scored to goals in Suriname's home territory giving the salvadorans a 3-1 Victory. In March 24, 2012 Lester Blanco scored a goal in a Sub23 Victory 4-0 Match Against Cuba in minute '4 in the game. Lester Blanco scored against USA in a Sub23 match leaving USA Eliminated in the Preolympic Tournaments.
- El Salvador 2009/10 - RSSSF
- "Léster Blanco klar for KIL". glomdalen.no (in Norwegian). 30 May 2012. Retrieved 13 July 2012.