Edgar Castillo

Castillo began his professional career with Santos Laguna of the Primera División de México. After becoming a first team regular at Santos, and winning the championship in 2008, Castillo transferred mid season to Club América in January 2009. During the off-season, Castillo was placed on loan to Tigres UANL and will play for them during the 2009/10 season. He scored his first goal for Tigres against his former side, Santos Laguna, on August 30, 2009.

With Mexico:
In early August 2007, Mexico national football team coach Hugo Sánchez called Castillo for the three upcoming friendlies with Colombia, Panama, and Brazil.

On August 22, 2007, Castillo made his debut with the Mexican national squad and entered at the 53rd minute in the friendly match against Colombia. In March, 2008 he was also a member of the Mexico U-23 squad which participated in the 2008 CONCACAF Men Pre-Olympic Tournament in order to qualify for the 2008 Summer Olympics.

He was called up by Sven-Göran Eriksson to be on the 23-man roster for the Mexican national team, but he was benched during the game against Honduras on August 20, 2008. On November 12, 2008, Castillo appeared in a friendly match against Ecuador in Phoenix, Arizona. He replaced Francisco Fonseca as Mexico beat Ecuador 2–1. He was called up for the national team again on January 28, 2009, in a friendly against Sweden. Castillo was called up to the national side for World Cup qualifiers against Costa Rica in Mexico City and Honduras in San Pedro Sula on March 28 and April 1, 2009 but was unable to travel to either match because he had "lost" his Mexican passport.

With USA:

Under a recent change in FIFA regulations, Castillo became eligible to play for the United States because he had yet to make an appearance for Mexico in a competitive match at senior level, as opposed to an international friendly or an A-grade international.[2] The new rule allowed players of any age to make a one-time change of footballing nationality if they held citizenship in their new country and have not played in a competitive match at senior level for their previous country. The previous rule only allowed a change if the player was under 21.[1]

On June 29, 2009, he was asked about possibly playing for the United States, saying, "I would play for the United States. I'd want to talk to them first, but I want to play for the U.S. I think it would be a very good opportunity for me, for my career. If they call me I would play for them." Castillo also said, "I have made my decision. I want to represent the country where I was born, the place where I live."[3][4]

In September 2009, Castillo was cleared by FIFA to join the United States national team.[5] On October 31, 2009 Castillo reveals to Mexican media after a Tigres UANL match vs Estudiantes Tecos that he had received a call earlier that day and stated "I was called up for training with the USA team and I am expected to appear to play against Denmark ....I'm hoping to give a good impression".[6]

Castillo made his USA debut as a second-half sub in a friendly against Denmark in which they lost on November 18, 2009. He is now the second player to earn caps for both Mexico and the United States, joining Martin Vasquez, who played non-FIFA-recognized matches with Mexico in 1992 and 1993 before receiving official call-ups to the US starting in 1996. Edgar started at left back for the U.S. in Jurgen Klinsmann's debut 1-1 draw against Mexico in August 2011.