César Osvaldo Villaluz Martínez (born July 18, 1988) is a Mexican professional footballer who plays as a midfielder for Cancún. At age seventeen, he participated in the U-17 World Cup with the Mexico national team. His efforts as midfielder assisted the team to victory against Brazil, as well as throughout the entire tournament. Fellow team players Carlos Vela and Giovani dos Santos, both of whom are younger than he, played with him in the 2007 FIFA U-20 World Cup that took place in Canada in 2007. The Mexico national team faced off against the national football teams of Portugal, Gambia, New Zealand, in that order in the group round; Mexico was eliminated by Argentina.