Javier Alejandro Mascherano (born 8 June 1984) is an Argentine footballer who plays as a defensive midfielder for FC Barcelona. He can also play as a central defender. Mascherano began his career at River Plate. He earned his first senior honours in 2003–04, winning the Primera División Argentina. He also won an Olympic gold medal with Argentina in the Athens Games and finished runner up in the Copa América 2004. He moved to Brazilian side Corinthians in 2005, winning the Brazilian Série A in his first season. Mascherano moved to Europe, signing for Premier League side West Ham United. However, unusual contract terms with Media Sports Investments blighted his brief time at the club and at the beginning of 2007 he joined Liverpool on loan.
He was runner up in the UEFA Champions League in his first season on Merseyside and again finished runner up in the Copa América with Argentina. He officially signed for Liverpool in February 2008 for £18.6 million, parting ways with Media Sports Investments. He won a second Olympic gold medal with Argentina in the Beijing 2008 Games, the first male footballer to achieve this since 1928. He was appointed captain of the national team by new head coach Diego Maradona in November 2008 who has repeatedly stated that his selection is "Mascherano and 10 more".
Mascherano's two most used nicknames (in Argentina) are Masche and El Jefecito (The little chief). Former Argentine footballers Jorge Valdano and Jorge Solari regard him as possibly the best central midfielder in the world.
He was considered a key part of the national side by past coach Diego Maradona who stated that his team was just Jonás, Mascherano, Messi and eight more.
Mascherano also holds an Italian passport, which makes him eligible as an EU player.
On 10 February, Liverpool added Mascherano to their Champions League squad and gave him the number 20 shirt. Eventually, on 20 February 2007, Mascherano's move to Liverpool became official after the Premier League accepted Liverpool's request to register the player at Anfield.
On 28 August 2010, he agreed terms on a four-year deal contract with Barcelona for £22 million On 30 August 2010, Mascherano passed his medical to complete his transfer to Barça, and told Barça TV "All is fair in fair and love". He made his league debut on 11 September 2010, starting in a home 2–0 defeat against recently promoted Hércules CF, marking the first defeat at the Camp Nou for 16 months. Mascherano had a mixed season at the Camp Nou, spending the first half of the season mainly coming off the bench but for the latter part playing out of position in a center back role. On 28 May 2011, Mascherano started alongside Gerard Piqué in the 2011 Champions League Final against Manchester United. Barcelona went on to win the game 3-1 with Mascherano dedicating the win to Liverpool fans, some of which he had upset during his move. In the run to the final, Mascherano denied Arsenal's Nicklas Bendtner a certain goal with a sliding tackle towards the end of the second round last 16 game, which the Catalan side beat the Gunners 3–1, 4–3 on aggregate.
