The 21-year-old Castillo, who was born and raised in the USA, plays left back for Santos and wide left in the midfield for Mexico's U-23 team. On Sunday, he played 90 minutes for Santos in its 3-0 win against Atlante. The win upped its Clausura 2008 record to 2-3-1 (win-loss-tie) and put it in first place of Group 2.
Castillo's goal against Chivas tied the game at 2-2 with 10 minutes left, but an 85th minute Omar Bravo goal gave Chivas a 3-2 win.
As part of its preparation for the Olympic qualifying tournament, the Mexican U-23s play Australia on Sunday in Oakland, Calif., and meet Finland March 6 in Frisco, Texas.
The USA is in a group with Panama, Honduras and Cuba in the CONCACAF Olympic qualifying tournament. The top two finishers from each four-team group advance to the semifinals, whose winners will qualifying for the Games in China next summer.
MEXICO U-23 ROSTER
Guillermo Ochoa (Club América), Jorge Villalpando (Puebla), Jonathan Orozco (Monterrey).
Omar Esparza (Chivas), Luis Robles (Atlas), Julio César Domínguez (Cruz Azul), Rodrigo Iñigo (Club América), Luis Omar Hernández (Necaxa), Hugo Ayala (Atlas), Francisco Gamboa (Toluca), Efraín Velarde (Pumas).
Jorge Hernández (Atlas), Patricio Araujo (Chivas), Alan Zamora (Atlante), Gerardo Rodríguez (Pachuca), Juan Carlos Silva (Club América), Edgar Castillo (Santos), César Villaluz (Cruz Azul), Sergio Ávila (Chivas).
Enrique Esqueda (Club América), Pablo Barrera (Pumas), Edgar Andrade (Cruz Azul), Santiago Fernández (Toluca), Luis Ángel Landín (Morelia), Omar Arellano (Chivas).