Simplify the following text for a Grade 6 native English-speaking person.
Original: Gonzalo Javier RodrÃ guez , sometimes just Gonzalo ( ; born April 10 , 1984 ) , is an Argentine footballer who plays for Villarreal CF in La Liga , as a central defender .
Simplified: Gonzalo Javier RodrÃ guez ( born 10 April 1984 ) is an Argentinae football player . He plays for Villarreal .